<header class="entry-header" style="box-sizing: inherit; border: 0px; font-family: Domine, Arial, Helvetica, sans-serif; font-size: 13px; margin: 0px; outline: 0px; padding: 0px; vertical-align: baseline; color: #555555;">
   <h1 class="post-title entry-title" style="box-sizing: inherit; border: 0px; font-variant-numeric: normal; font-variant-east-asian: normal; font-weight: normal; font-stretch: normal; font-size: 28px; line-height: 1.2; font-family: Oswald, Arial, Helvetica, sans-serif; margin: 0px 0px 10px; outline: 0px; padding: 0px; vertical-align: baseline; clear: both; color: #000000; position: relative; text-align: center;"><a href="https://stoppi-homemade-physics.de/dopplerradar/" rel="bookmark" style="box-sizing: inherit; border: 0px; font-family: inherit; font-style: inherit; font-weight: inherit; margin: 0px; outline: 0px; padding: 0px; vertical-align: baseline; color: #000000; text-decoration-line: none; transition: all 0.2s linear 0s;" target="_blank">Dopplerradar</a></h1>
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<div class="entry-content clearfix" style="box-sizing: inherit; border: 0px; margin: 10px 0px; outline: 0px; padding: 0px; vertical-align: baseline; position: relative; line-height: 1.7; overflow: hidden;">
   <p style="color: #555555; font-family: inherit; font-size: 13px; box-sizing: inherit; border: 0px; font-style: inherit; font-weight: inherit; margin-bottom: 12px; outline: 0px; padding: 0px; vertical-align: baseline;">Mittels Dopplerradar lassen sich Geschwindigkeiten von bewegten Objekten bestimmen. Basis bildet der Dopplereffekt. Vom Sensor wird eine elektromagnetische Welle mit einer bestimmten Frequenz ausgesendet. Trifft diese auf ein ruhendes Objekt, so wird eine Welle mit gleicher Frequenz reflektiert. Diese trifft dann wieder auf den Sensor und wird mit der ausgesandten Welle im sog. Mixer überlagert. Das Resultat ist eine sog. Schwebung. Besitzen die beiden Wellen die selbe Frequenz, so besitzt die überlagerte Schwebung eine Frequenz von 0 Hz.</p>
   <p style="color: #555555; font-family: inherit; font-size: 13px; box-sizing: inherit; border: 0px; font-style: inherit; font-weight: inherit; margin-bottom: 12px; outline: 0px; padding: 0px; vertical-align: baseline;">Trifft die ausgestrahlte Welle aber auf ein bewegtes Objekt, so wird je nach Bewegungsrichtung die reflektierte Welle eine höhere (bei Annäherung des Objekts) bzw. niedrigere (bei Entfernung des Objekts) Frequenz besitzen.</p>
   <p style="color: #555555; font-family: inherit; font-size: 13px; box-sizing: inherit; border: 0px; font-style: inherit; font-weight: inherit; margin-bottom: 12px; outline: 0px; padding: 0px; vertical-align: baseline;">Überlagert sich nun diese reflektierte Welle mit der ausgesandten, so entsteht eine Schwebung mit der Frequenz (f_ausgesandt – f_reflektiert). Diese wird an den Arduino weitergeleitet und von diesem gemessen. Die Frequenz der reflektierten Wellen bzw. in weiterer Folge auch die Frequenz der Schwebung hängt von der Geschwindigkeit v des bewegten Objekts ab. Aus der Schwebungsfrequenz lässt sich also die Geschwindigkeit des bewegten Objekts berechnen.</p>
   <p style="color: #555555; font-family: inherit; font-size: 13px; box-sizing: inherit; border: 0px; font-style: inherit; font-weight: inherit; margin-bottom: 12px; outline: 0px; padding: 0px; vertical-align: baseline;">Als Sensor kommt das weit verbreitete Modul HB100 zum Einsatz. Dieses kann für wenige Euro auf ebay erstanden werden.</p>
   <p style="color: #555555; font-family: inherit; font-size: 13px; box-sizing: inherit; border: 0px; font-style: inherit; font-weight: inherit; margin-bottom: 12px; outline: 0px; padding: 0px; vertical-align: baseline;">Hinweis: Probleme hatte ich mit der Spannungsversorgung des HB100. Verwendete ich direkt den +5V-pin des Arduino, so konnte ich damit keine gute Sensibilität erzielen. Deshalb wählte ich für beide Schaltungsvarianten einen LM317 Spannungsregler und wählte die Widerstände so, dass der LM317 ca. +5.1V lieferte. Damit versorgte ich dann den HB100.</p>
   <h3 style="color: #111111; font-family: &quot;Playfair Display&quot;, Arial, sans-serif; font-size: 24px; box-sizing: inherit; border: 0px; font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; line-height: 1; margin: 0.6em 0px; outline: 0px; padding: 0px; vertical-align: baseline; clear: both;">Variante 1:</h3>
   <p style="color: #555555; font-family: inherit; font-size: 13px; box-sizing: inherit; border: 0px; font-style: inherit; font-weight: inherit; margin-bottom: 12px; outline: 0px; padding: 0px; vertical-align: baseline;"><img loading="lazy" class=" wp-image-254 aligncenter" src="https://stoppi-homemade-physics.de/wp-content/uploads/2021/02/Doppler_HB100_Arduino_b_18-300x186.jpg" alt="" width="705" srcset="https://stoppi-homemade-physics.de/wp-content/uploads/2021/02/Doppler_HB100_Arduino_b_18-300x186.jpg 300w, https://stoppi-homemade-physics.de/wp-content/uploads/2021/02/Doppler_HB100_Arduino_b_18-1024x634.jpg 1024w, https://stoppi-homemade-physics.de/wp-content/uploads/2021/02/Doppler_HB100_Arduino_b_18-768x476.jpg 768w, https://stoppi-homemade-physics.de/wp-content/uploads/2021/02/Doppler_HB100_Arduino_b_18.jpg 1167w" sizes="(max-width: 705px) 100vw, 705px" style="box-sizing: inherit; border: 0px; font-family: inherit; font-style: inherit; font-weight: inherit; margin: 0px auto 10px; outline: 0px; padding: 0px; vertical-align: baseline; max-width: 100%; height: auto; clear: both; display: block;" /></p>
   <p style="color: #555555; font-family: inherit; font-size: 13px; box-sizing: inherit; border: 0px; font-style: inherit; font-weight: inherit; margin-bottom: 12px; outline: 0px; padding: 0px; vertical-align: baseline;"><img loading="lazy" class=" wp-image-248 aligncenter" src="https://stoppi-homemade-physics.de/wp-content/uploads/2021/02/Doppler_HB100_Arduino_b_01-300x171.jpg" alt="" width="885" srcset="https://stoppi-homemade-physics.de/wp-content/uploads/2021/02/Doppler_HB100_Arduino_b_01-300x171.jpg 300w, https://stoppi-homemade-physics.de/wp-content/uploads/2021/02/Doppler_HB100_Arduino_b_01-1024x584.jpg 1024w, https://stoppi-homemade-physics.de/wp-content/uploads/2021/02/Doppler_HB100_Arduino_b_01-768x438.jpg 768w, https://stoppi-homemade-physics.de/wp-content/uploads/2021/02/Doppler_HB100_Arduino_b_01.jpg 1302w" sizes="(max-width: 885px) 100vw, 885px" style="box-sizing: inherit; border: 0px; font-family: inherit; font-style: inherit; font-weight: inherit; margin: 0px auto 10px; outline: 0px; padding: 0px; vertical-align: baseline; max-width: 100%; height: auto; clear: both; display: block;" /></p>
   <p style="color: #555555; font-family: inherit; font-size: 13px; box-sizing: inherit; border: 0px; font-style: inherit; font-weight: inherit; margin-bottom: 12px; outline: 0px; padding: 0px; vertical-align: baseline;"><img loading="lazy" class=" wp-image-262 aligncenter" src="https://stoppi-homemade-physics.de/wp-content/uploads/2021/02/Doppler_HB100_Arduino_b_13-300x225.jpg" alt="" width="704" srcset="https://stoppi-homemade-physics.de/wp-content/uploads/2021/02/Doppler_HB100_Arduino_b_13-300x225.jpg 300w, https://stoppi-homemade-physics.de/wp-content/uploads/2021/02/Doppler_HB100_Arduino_b_13-768x576.jpg 768w, https://stoppi-homemade-physics.de/wp-content/uploads/2021/02/Doppler_HB100_Arduino_b_13-480x360.jpg 480w, https://stoppi-homemade-physics.de/wp-content/uploads/2021/02/Doppler_HB100_Arduino_b_13.jpg 1024w" sizes="(max-width: 704px) 100vw, 704px" style="box-sizing: inherit; border: 0px; font-family: inherit; font-style: inherit; font-weight: inherit; margin: 0px auto 10px; outline: 0px; padding: 0px; vertical-align: baseline; max-width: 100%; height: auto; clear: both; display: block;" /></p>
   <p style="color: #555555; font-family: inherit; font-size: 13px; box-sizing: inherit; border: 0px; font-style: inherit; font-weight: inherit; margin-bottom: 12px; outline: 0px; padding: 0px; vertical-align: baseline;"><img loading="lazy" class=" wp-image-263 aligncenter" src="https://stoppi-homemade-physics.de/wp-content/uploads/2021/02/Doppler_HB100_Arduino_b_17-300x225.jpg" alt="" width="705" srcset="https://stoppi-homemade-physics.de/wp-content/uploads/2021/02/Doppler_HB100_Arduino_b_17-300x225.jpg 300w, https://stoppi-homemade-physics.de/wp-content/uploads/2021/02/Doppler_HB100_Arduino_b_17-768x576.jpg 768w, https://stoppi-homemade-physics.de/wp-content/uploads/2021/02/Doppler_HB100_Arduino_b_17-480x360.jpg 480w, https://stoppi-homemade-physics.de/wp-content/uploads/2021/02/Doppler_HB100_Arduino_b_17.jpg 1024w" sizes="(max-width: 705px) 100vw, 705px" style="box-sizing: inherit; border: 0px; font-family: inherit; font-style: inherit; font-weight: inherit; margin: 0px auto 10px; outline: 0px; padding: 0px; vertical-align: baseline; max-width: 100%; height: auto; clear: both; display: block;" /></p>
   <p style="color: #555555; font-family: inherit; font-size: 13px; box-sizing: inherit; border: 0px; font-style: inherit; font-weight: inherit; margin-bottom: 12px; outline: 0px; padding: 0px; vertical-align: baseline;"><img loading="lazy" class=" wp-image-251 aligncenter" src="https://stoppi-homemade-physics.de/wp-content/uploads/2021/02/Doppler_HB100_Arduino_b_08-300x225.jpg" alt="" width="705" srcset="https://stoppi-homemade-physics.de/wp-content/uploads/2021/02/Doppler_HB100_Arduino_b_08-300x225.jpg 300w, https://stoppi-homemade-physics.de/wp-content/uploads/2021/02/Doppler_HB100_Arduino_b_08-768x576.jpg 768w, https://stoppi-homemade-physics.de/wp-content/uploads/2021/02/Doppler_HB100_Arduino_b_08-480x360.jpg 480w, https://stoppi-homemade-physics.de/wp-content/uploads/2021/02/Doppler_HB100_Arduino_b_08.jpg 1024w" sizes="(max-width: 705px) 100vw, 705px" style="box-sizing: inherit; border: 0px; font-family: inherit; font-style: inherit; font-weight: inherit; margin: 0px auto 10px; outline: 0px; padding: 0px; vertical-align: baseline; max-width: 100%; height: auto; clear: both; display: block;" /></p>
   <p style="color: #555555; font-family: inherit; font-size: 13px; box-sizing: inherit; border: 0px; font-style: inherit; font-weight: inherit; margin-bottom: 12px; outline: 0px; padding: 0px; vertical-align: baseline;"><img loading="lazy" class=" wp-image-253 aligncenter" src="https://stoppi-homemade-physics.de/wp-content/uploads/2021/02/Doppler_HB100_Arduino_b_15-225x300.jpg" alt="" width="617" srcset="https://stoppi-homemade-physics.de/wp-content/uploads/2021/02/Doppler_HB100_Arduino_b_15-225x300.jpg 225w, https://stoppi-homemade-physics.de/wp-content/uploads/2021/02/Doppler_HB100_Arduino_b_15.jpg 768w" sizes="(max-width: 617px) 100vw, 617px" style="box-sizing: inherit; border: 0px; font-family: inherit; font-style: inherit; font-weight: inherit; margin: 0px auto 10px; outline: 0px; padding: 0px; vertical-align: baseline; max-width: 100%; height: auto; clear: both; display: block;" /></p>
   <p style="color: #555555; font-family: inherit; font-size: 13px; box-sizing: inherit; border: 0px; font-style: inherit; font-weight: inherit; margin-bottom: 12px; outline: 0px; padding: 0px; vertical-align: baseline;">&nbsp;</p>
   <hr style="color: #555555; font-family: Domine, Arial, Helvetica, sans-serif; font-size: 13px; box-sizing: content-box; height: 1px; background-color: #cccccc; border: 0px; margin-bottom: 1.5em;" />
   <h3 style="color: #111111; font-family: &quot;Playfair Display&quot;, Arial, sans-serif; font-size: 24px; box-sizing: inherit; border: 0px; font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; line-height: 1; margin: 0.6em 0px; outline: 0px; padding: 0px; vertical-align: baseline; clear: both;">Variante 2:</h3>
   <p style="color: #555555; font-family: inherit; font-size: 13px; box-sizing: inherit; border: 0px; font-style: inherit; font-weight: inherit; margin-bottom: 12px; outline: 0px; padding: 0px; vertical-align: baseline;"><img loading="lazy" class=" wp-image-255 aligncenter" src="https://stoppi-homemade-physics.de/wp-content/uploads/2021/02/Doppler_HB100_Arduino_c_01-300x131.jpg" alt="" width="1034" srcset="https://stoppi-homemade-physics.de/wp-content/uploads/2021/02/Doppler_HB100_Arduino_c_01-300x131.jpg 300w, https://stoppi-homemade-physics.de/wp-content/uploads/2021/02/Doppler_HB100_Arduino_c_01-1024x448.jpg 1024w, https://stoppi-homemade-physics.de/wp-content/uploads/2021/02/Doppler_HB100_Arduino_c_01-768x336.jpg 768w, https://stoppi-homemade-physics.de/wp-content/uploads/2021/02/Doppler_HB100_Arduino_c_01.jpg 1201w" sizes="(max-width: 1034px) 100vw, 1034px" style="box-sizing: inherit; border: 0px; font-family: inherit; font-style: inherit; font-weight: inherit; margin: 0px auto 10px; outline: 0px; padding: 0px; vertical-align: baseline; max-width: 100%; height: auto; clear: both; display: block;" /></p>
   <p style="color: #555555; font-family: inherit; font-size: 13px; box-sizing: inherit; border: 0px; font-style: inherit; font-weight: inherit; margin-bottom: 12px; outline: 0px; padding: 0px; vertical-align: baseline;"><img loading="lazy" class=" wp-image-256 aligncenter" src="https://stoppi-homemade-physics.de/wp-content/uploads/2021/02/Doppler_HB100_Arduino_c_03-300x225.jpg" alt="" width="704" srcset="https://stoppi-homemade-physics.de/wp-content/uploads/2021/02/Doppler_HB100_Arduino_c_03-300x225.jpg 300w, https://stoppi-homemade-physics.de/wp-content/uploads/2021/02/Doppler_HB100_Arduino_c_03-768x576.jpg 768w, https://stoppi-homemade-physics.de/wp-content/uploads/2021/02/Doppler_HB100_Arduino_c_03-480x360.jpg 480w, https://stoppi-homemade-physics.de/wp-content/uploads/2021/02/Doppler_HB100_Arduino_c_03.jpg 1024w" sizes="(max-width: 704px) 100vw, 704px" style="box-sizing: inherit; border: 0px; font-family: inherit; font-style: inherit; font-weight: inherit; margin: 0px auto 10px; outline: 0px; padding: 0px; vertical-align: baseline; max-width: 100%; height: auto; clear: both; display: block;" /></p>
   <p style="color: #555555; font-family: inherit; font-size: 13px; box-sizing: inherit; border: 0px; font-style: inherit; font-weight: inherit; margin-bottom: 12px; outline: 0px; padding: 0px; vertical-align: baseline;"><img loading="lazy" class=" wp-image-257 aligncenter" src="https://stoppi-homemade-physics.de/wp-content/uploads/2021/02/Doppler_HB100_Arduino_c_05-300x225.jpg" alt="" width="705" srcset="https://stoppi-homemade-physics.de/wp-content/uploads/2021/02/Doppler_HB100_Arduino_c_05-300x225.jpg 300w, https://stoppi-homemade-physics.de/wp-content/uploads/2021/02/Doppler_HB100_Arduino_c_05-768x576.jpg 768w, https://stoppi-homemade-physics.de/wp-content/uploads/2021/02/Doppler_HB100_Arduino_c_05-480x360.jpg 480w, https://stoppi-homemade-physics.de/wp-content/uploads/2021/02/Doppler_HB100_Arduino_c_05.jpg 1024w" sizes="(max-width: 705px) 100vw, 705px" style="box-sizing: inherit; border: 0px; font-family: inherit; font-style: inherit; font-weight: inherit; margin: 0px auto 10px; outline: 0px; padding: 0px; vertical-align: baseline; max-width: 100%; height: auto; clear: both; display: block;" /></p>
   <p style="color: #555555; font-family: inherit; font-size: 13px; box-sizing: inherit; border: 0px; font-style: inherit; font-weight: inherit; margin-bottom: 12px; outline: 0px; padding: 0px; vertical-align: baseline;"><img loading="lazy" class=" wp-image-258 aligncenter" src="https://stoppi-homemade-physics.de/wp-content/uploads/2021/02/Doppler_HB100_Arduino_c_07-300x225.jpg" alt="" width="704" srcset="https://stoppi-homemade-physics.de/wp-content/uploads/2021/02/Doppler_HB100_Arduino_c_07-300x225.jpg 300w, https://stoppi-homemade-physics.de/wp-content/uploads/2021/02/Doppler_HB100_Arduino_c_07-768x576.jpg 768w, https://stoppi-homemade-physics.de/wp-content/uploads/2021/02/Doppler_HB100_Arduino_c_07-480x360.jpg 480w, https://stoppi-homemade-physics.de/wp-content/uploads/2021/02/Doppler_HB100_Arduino_c_07.jpg 1024w" sizes="(max-width: 704px) 100vw, 704px" style="box-sizing: inherit; border: 0px; font-family: inherit; font-style: inherit; font-weight: inherit; margin: 0px auto 10px; outline: 0px; padding: 0px; vertical-align: baseline; max-width: 100%; height: auto; clear: both; display: block;" /></p>
   <p style="color: #555555; font-family: inherit; font-size: 13px; box-sizing: inherit; border: 0px; font-style: inherit; font-weight: inherit; margin-bottom: 12px; outline: 0px; padding: 0px; vertical-align: baseline;"><iframe loading="lazy" width="673" height="505" src="https://www.youtube.com/embed/TwmwfbFrPk4" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture" allowfullscreen="allowfullscreen" style="box-sizing: inherit; border-width: 0px; border-style: initial; font-family: inherit; font-style: inherit; font-weight: inherit; margin: 0px; outline: 0px; padding: 0px; vertical-align: baseline; max-width: 100%;"></iframe></p>
   <hr style="color: #555555; font-family: Domine, Arial, Helvetica, sans-serif; font-size: 13px; box-sizing: content-box; height: 1px; background-color: #cccccc; border: 0px; margin-bottom: 1.5em;" />
   <div id="urvanov-syntax-highlighter-60541efd2ccbe523492353" class="urvanov-syntax-highlighter-syntax crayon-theme-classic urvanov-syntax-highlighter-font-monaco urvanov-syntax-highlighter-os-pc print-yes notranslate" data-settings=" minimize scroll-mouseover" style="box-sizing: border-box; border-image: initial; margin: 12px 0px; outline: 0px; padding: 0px; vertical-align: baseline; text-size-adjust: none; width: 631.312px; height: auto; border-width: 1px !important; border-style: solid !important; border-color: #999999 !important; overflow: hidden !important; position: relative !important; direction: ltr !important; text-shadow: none !important; background: rgb(253, 253, 253) !important; line-height: 15px !important;">
      <header class="entry-header" style="color: #555555; font-family: Domine, Arial, Helvetica, sans-serif; font-size: 13px; font-style: inherit; box-sizing: inherit; border: 0px; margin: 0px; outline: 0px; padding: 0px; vertical-align: baseline;">
         <h1 class="post-title entry-title" style="box-sizing: inherit; border: 0px; font-variant-numeric: normal; font-variant-east-asian: normal; font-weight: normal; font-stretch: normal; font-size: 28px; line-height: 1.2; font-family: Oswald, Arial, Helvetica, sans-serif; margin: 0px 0px 10px; outline: 0px; padding: 0px; vertical-align: baseline; clear: both; color: #000000; position: relative; text-align: center;"><a href="https://stoppi-homemade-physics.de/dopplerradar/" rel="bookmark" style="box-sizing: inherit; border: 0px; font-family: inherit; font-style: inherit; font-weight: inherit; margin: 0px; outline: 0px; padding: 0px; vertical-align: baseline; background-color: transparent; color: #000000; text-decoration-line: none; transition: all 0.2s linear 0s;" target="_blank">Dopplerradar</a></h1>
         </header>
      <div class="entry-content clearfix" style="box-sizing: inherit; border: 0px; margin: 10px 0px; outline: 0px; padding: 0px; vertical-align: baseline; position: relative; line-height: 1.7; overflow: hidden;">
         <p style="color: #555555; font-family: inherit; font-size: 13px; font-style: inherit; box-sizing: inherit; border: 0px; font-weight: inherit; margin-bottom: 12px; outline: 0px; padding: 0px; vertical-align: baseline;">Mittels Dopplerradar lassen sich Geschwindigkeiten von bewegten Objekten bestimmen. Basis bildet der Dopplereffekt. Vom Sensor wird eine elektromagnetische Welle mit einer bestimmten Frequenz ausgesendet. Trifft diese auf ein ruhendes Objekt, so wird eine Welle mit gleicher Frequenz reflektiert. Diese trifft dann wieder auf den Sensor und wird mit der ausgesandten Welle im sog. Mixer überlagert. Das Resultat ist eine sog. Schwebung. Besitzen die beiden Wellen die selbe Frequenz, so besitzt die überlagerte Schwebung eine Frequenz von 0 Hz.</p>
         <p style="color: #555555; font-family: inherit; font-size: 13px; font-style: inherit; box-sizing: inherit; border: 0px; font-weight: inherit; margin-bottom: 12px; outline: 0px; padding: 0px; vertical-align: baseline;">Trifft die ausgestrahlte Welle aber auf ein bewegtes Objekt, so wird je nach Bewegungsrichtung die reflektierte Welle eine höhere (bei Annäherung des Objekts) bzw. niedrigere (bei Entfernung des Objekts) Frequenz besitzen.</p>
         <p style="color: #555555; font-family: inherit; font-size: 13px; font-style: inherit; box-sizing: inherit; border: 0px; font-weight: inherit; margin-bottom: 12px; outline: 0px; padding: 0px; vertical-align: baseline;">Überlagert sich nun diese reflektierte Welle mit der ausgesandten, so entsteht eine Schwebung mit der Frequenz (f_ausgesandt – f_reflektiert). Diese wird an den Arduino weitergeleitet und von diesem gemessen. Die Frequenz der reflektierten Wellen bzw. in weiterer Folge auch die Frequenz der Schwebung hängt von der Geschwindigkeit v des bewegten Objekts ab. Aus der Schwebungsfrequenz lässt sich also die Geschwindigkeit des bewegten Objekts berechnen.</p>
         <p style="color: #555555; font-family: inherit; font-size: 13px; font-style: inherit; box-sizing: inherit; border: 0px; font-weight: inherit; margin-bottom: 12px; outline: 0px; padding: 0px; vertical-align: baseline;">Als Sensor kommt das weit verbreitete Modul HB100 zum Einsatz. Dieses kann für wenige Euro auf ebay erstanden werden.</p>
         <p style="color: #555555; font-family: inherit; font-size: 13px; font-style: inherit; box-sizing: inherit; border: 0px; font-weight: inherit; margin-bottom: 12px; outline: 0px; padding: 0px; vertical-align: baseline;">Hinweis: Probleme hatte ich mit der Spannungsversorgung des HB100. Verwendete ich direkt den +5V-pin des Arduino, so konnte ich damit keine gute Sensibilität erzielen. Deshalb wählte ich für beide Schaltungsvarianten einen LM317 Spannungsregler und wählte die Widerstände so, dass der LM317 ca. +5.1V lieferte. Damit versorgte ich dann den HB100.</p>
         <h3 style="color: #111111; font-family: &quot;Playfair Display&quot;, Arial, sans-serif; font-size: 24px; font-style: inherit; box-sizing: inherit; border: 0px; font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; line-height: 1; margin: 0.6em 0px; outline: 0px; padding: 0px; vertical-align: baseline; clear: both;">Variante 1:</h3>
         <p style="color: #555555; font-family: inherit; font-size: 13px; font-style: inherit; box-sizing: inherit; border: 0px; font-weight: inherit; margin-bottom: 12px; outline: 0px; padding: 0px; vertical-align: baseline;"><img loading="lazy" class=" wp-image-254 aligncenter" src="https://stoppi-homemade-physics.de/wp-content/uploads/2021/02/Doppler_HB100_Arduino_b_18-300x186.jpg" alt="" width="705" srcset="https://stoppi-homemade-physics.de/wp-content/uploads/2021/02/Doppler_HB100_Arduino_b_18-300x186.jpg 300w, https://stoppi-homemade-physics.de/wp-content/uploads/2021/02/Doppler_HB100_Arduino_b_18-1024x634.jpg 1024w, https://stoppi-homemade-physics.de/wp-content/uploads/2021/02/Doppler_HB100_Arduino_b_18-768x476.jpg 768w, https://stoppi-homemade-physics.de/wp-content/uploads/2021/02/Doppler_HB100_Arduino_b_18.jpg 1167w" sizes="(max-width: 705px) 100vw, 705px" style="box-sizing: inherit; border: 0px; font-family: inherit; font-style: inherit; font-weight: inherit; margin: 0px auto 10px; outline: 0px; padding: 0px; vertical-align: baseline; max-width: 100%; height: auto; clear: both; display: block;" /></p>
         <p style="color: #555555; font-family: inherit; font-size: 13px; font-style: inherit; box-sizing: inherit; border: 0px; font-weight: inherit; margin-bottom: 12px; outline: 0px; padding: 0px; vertical-align: baseline;"><img loading="lazy" class=" wp-image-248 aligncenter" src="https://stoppi-homemade-physics.de/wp-content/uploads/2021/02/Doppler_HB100_Arduino_b_01-300x171.jpg" alt="" width="885" srcset="https://stoppi-homemade-physics.de/wp-content/uploads/2021/02/Doppler_HB100_Arduino_b_01-300x171.jpg 300w, https://stoppi-homemade-physics.de/wp-content/uploads/2021/02/Doppler_HB100_Arduino_b_01-1024x584.jpg 1024w, https://stoppi-homemade-physics.de/wp-content/uploads/2021/02/Doppler_HB100_Arduino_b_01-768x438.jpg 768w, https://stoppi-homemade-physics.de/wp-content/uploads/2021/02/Doppler_HB100_Arduino_b_01.jpg 1302w" sizes="(max-width: 885px) 100vw, 885px" style="box-sizing: inherit; border: 0px; font-family: inherit; font-style: inherit; font-weight: inherit; margin: 0px auto 10px; outline: 0px; padding: 0px; vertical-align: baseline; max-width: 100%; height: auto; clear: both; display: block;" /></p>
         <p style="color: #555555; font-family: inherit; font-size: 13px; font-style: inherit; box-sizing: inherit; border: 0px; font-weight: inherit; margin-bottom: 12px; outline: 0px; padding: 0px; vertical-align: baseline;"><img loading="lazy" class=" wp-image-262 aligncenter" src="https://stoppi-homemade-physics.de/wp-content/uploads/2021/02/Doppler_HB100_Arduino_b_13-300x225.jpg" alt="" width="704" srcset="https://stoppi-homemade-physics.de/wp-content/uploads/2021/02/Doppler_HB100_Arduino_b_13-300x225.jpg 300w, https://stoppi-homemade-physics.de/wp-content/uploads/2021/02/Doppler_HB100_Arduino_b_13-768x576.jpg 768w, https://stoppi-homemade-physics.de/wp-content/uploads/2021/02/Doppler_HB100_Arduino_b_13-480x360.jpg 480w, https://stoppi-homemade-physics.de/wp-content/uploads/2021/02/Doppler_HB100_Arduino_b_13.jpg 1024w" sizes="(max-width: 704px) 100vw, 704px" style="box-sizing: inherit; border: 0px; font-family: inherit; font-style: inherit; font-weight: inherit; margin: 0px auto 10px; outline: 0px; padding: 0px; vertical-align: baseline; max-width: 100%; height: auto; clear: both; display: block;" /></p>
         <p style="color: #555555; font-family: inherit; font-size: 13px; font-style: inherit; box-sizing: inherit; border: 0px; font-weight: inherit; margin-bottom: 12px; outline: 0px; padding: 0px; vertical-align: baseline;"><img loading="lazy" class=" wp-image-263 aligncenter" src="https://stoppi-homemade-physics.de/wp-content/uploads/2021/02/Doppler_HB100_Arduino_b_17-300x225.jpg" alt="" width="705" srcset="https://stoppi-homemade-physics.de/wp-content/uploads/2021/02/Doppler_HB100_Arduino_b_17-300x225.jpg 300w, https://stoppi-homemade-physics.de/wp-content/uploads/2021/02/Doppler_HB100_Arduino_b_17-768x576.jpg 768w, https://stoppi-homemade-physics.de/wp-content/uploads/2021/02/Doppler_HB100_Arduino_b_17-480x360.jpg 480w, https://stoppi-homemade-physics.de/wp-content/uploads/2021/02/Doppler_HB100_Arduino_b_17.jpg 1024w" sizes="(max-width: 705px) 100vw, 705px" style="box-sizing: inherit; border: 0px; font-family: inherit; font-style: inherit; font-weight: inherit; margin: 0px auto 10px; outline: 0px; padding: 0px; vertical-align: baseline; max-width: 100%; height: auto; clear: both; display: block;" /></p>
         <p style="color: #555555; font-family: inherit; font-size: 13px; font-style: inherit; box-sizing: inherit; border: 0px; font-weight: inherit; margin-bottom: 12px; outline: 0px; padding: 0px; vertical-align: baseline;"><img loading="lazy" class=" wp-image-251 aligncenter" src="https://stoppi-homemade-physics.de/wp-content/uploads/2021/02/Doppler_HB100_Arduino_b_08-300x225.jpg" alt="" width="705" srcset="https://stoppi-homemade-physics.de/wp-content/uploads/2021/02/Doppler_HB100_Arduino_b_08-300x225.jpg 300w, https://stoppi-homemade-physics.de/wp-content/uploads/2021/02/Doppler_HB100_Arduino_b_08-768x576.jpg 768w, https://stoppi-homemade-physics.de/wp-content/uploads/2021/02/Doppler_HB100_Arduino_b_08-480x360.jpg 480w, https://stoppi-homemade-physics.de/wp-content/uploads/2021/02/Doppler_HB100_Arduino_b_08.jpg 1024w" sizes="(max-width: 705px) 100vw, 705px" style="box-sizing: inherit; border: 0px; font-family: inherit; font-style: inherit; font-weight: inherit; margin: 0px auto 10px; outline: 0px; padding: 0px; vertical-align: baseline; max-width: 100%; height: auto; clear: both; display: block;" /></p>
         <p style="color: #555555; font-family: inherit; font-size: 13px; font-style: inherit; box-sizing: inherit; border: 0px; font-weight: inherit; margin-bottom: 12px; outline: 0px; padding: 0px; vertical-align: baseline;"><img loading="lazy" class=" wp-image-253 aligncenter" src="https://stoppi-homemade-physics.de/wp-content/uploads/2021/02/Doppler_HB100_Arduino_b_15-225x300.jpg" alt="" width="617" srcset="https://stoppi-homemade-physics.de/wp-content/uploads/2021/02/Doppler_HB100_Arduino_b_15-225x300.jpg 225w, https://stoppi-homemade-physics.de/wp-content/uploads/2021/02/Doppler_HB100_Arduino_b_15.jpg 768w" sizes="(max-width: 617px) 100vw, 617px" style="box-sizing: inherit; border: 0px; font-family: inherit; font-style: inherit; font-weight: inherit; margin: 0px auto 10px; outline: 0px; padding: 0px; vertical-align: baseline; max-width: 100%; height: auto; clear: both; display: block;" /></p>
         <p style="color: #555555; font-family: inherit; font-size: 13px; font-style: inherit; box-sizing: inherit; border: 0px; font-weight: inherit; margin-bottom: 12px; outline: 0px; padding: 0px; vertical-align: baseline;">&nbsp;</p>
         <hr style="color: #555555; font-family: Domine, Arial, Helvetica, sans-serif; font-size: 13px; font-style: inherit; box-sizing: content-box; height: 1px; background-color: #cccccc; border: 0px; margin-bottom: 1.5em;" />
         <h3 style="color: #111111; font-family: &quot;Playfair Display&quot;, Arial, sans-serif; font-size: 24px; font-style: inherit; box-sizing: inherit; border: 0px; font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; line-height: 1; margin: 0.6em 0px; outline: 0px; padding: 0px; vertical-align: baseline; clear: both;">Variante 2:</h3>
         <p style="color: #555555; font-family: inherit; font-size: 13px; font-style: inherit; box-sizing: inherit; border: 0px; font-weight: inherit; margin-bottom: 12px; outline: 0px; padding: 0px; vertical-align: baseline;"><img loading="lazy" class=" wp-image-255 aligncenter" src="https://stoppi-homemade-physics.de/wp-content/uploads/2021/02/Doppler_HB100_Arduino_c_01-300x131.jpg" alt="" width="1034" srcset="https://stoppi-homemade-physics.de/wp-content/uploads/2021/02/Doppler_HB100_Arduino_c_01-300x131.jpg 300w, https://stoppi-homemade-physics.de/wp-content/uploads/2021/02/Doppler_HB100_Arduino_c_01-1024x448.jpg 1024w, https://stoppi-homemade-physics.de/wp-content/uploads/2021/02/Doppler_HB100_Arduino_c_01-768x336.jpg 768w, https://stoppi-homemade-physics.de/wp-content/uploads/2021/02/Doppler_HB100_Arduino_c_01.jpg 1201w" sizes="(max-width: 1034px) 100vw, 1034px" style="box-sizing: inherit; border: 0px; font-family: inherit; font-style: inherit; font-weight: inherit; margin: 0px auto 10px; outline: 0px; padding: 0px; vertical-align: baseline; max-width: 100%; height: auto; clear: both; display: block;" /></p>
         <p style="color: #555555; font-family: inherit; font-size: 13px; font-style: inherit; box-sizing: inherit; border: 0px; font-weight: inherit; margin-bottom: 12px; outline: 0px; padding: 0px; vertical-align: baseline;"><img loading="lazy" class=" wp-image-256 aligncenter" src="https://stoppi-homemade-physics.de/wp-content/uploads/2021/02/Doppler_HB100_Arduino_c_03-300x225.jpg" alt="" width="704" srcset="https://stoppi-homemade-physics.de/wp-content/uploads/2021/02/Doppler_HB100_Arduino_c_03-300x225.jpg 300w, https://stoppi-homemade-physics.de/wp-content/uploads/2021/02/Doppler_HB100_Arduino_c_03-768x576.jpg 768w, https://stoppi-homemade-physics.de/wp-content/uploads/2021/02/Doppler_HB100_Arduino_c_03-480x360.jpg 480w, https://stoppi-homemade-physics.de/wp-content/uploads/2021/02/Doppler_HB100_Arduino_c_03.jpg 1024w" sizes="(max-width: 704px) 100vw, 704px" style="box-sizing: inherit; border: 0px; font-family: inherit; font-style: inherit; font-weight: inherit; margin: 0px auto 10px; outline: 0px; padding: 0px; vertical-align: baseline; max-width: 100%; height: auto; clear: both; display: block;" /></p>
         <p style="color: #555555; font-family: inherit; font-size: 13px; font-style: inherit; box-sizing: inherit; border: 0px; font-weight: inherit; margin-bottom: 12px; outline: 0px; padding: 0px; vertical-align: baseline;"><img loading="lazy" class=" wp-image-257 aligncenter" src="https://stoppi-homemade-physics.de/wp-content/uploads/2021/02/Doppler_HB100_Arduino_c_05-300x225.jpg" alt="" width="705" srcset="https://stoppi-homemade-physics.de/wp-content/uploads/2021/02/Doppler_HB100_Arduino_c_05-300x225.jpg 300w, https://stoppi-homemade-physics.de/wp-content/uploads/2021/02/Doppler_HB100_Arduino_c_05-768x576.jpg 768w, https://stoppi-homemade-physics.de/wp-content/uploads/2021/02/Doppler_HB100_Arduino_c_05-480x360.jpg 480w, https://stoppi-homemade-physics.de/wp-content/uploads/2021/02/Doppler_HB100_Arduino_c_05.jpg 1024w" sizes="(max-width: 705px) 100vw, 705px" style="box-sizing: inherit; border: 0px; font-family: inherit; font-style: inherit; font-weight: inherit; margin: 0px auto 10px; outline: 0px; padding: 0px; vertical-align: baseline; max-width: 100%; height: auto; clear: both; display: block;" /></p>
         <p style="color: #555555; font-family: inherit; font-size: 13px; font-style: inherit; box-sizing: inherit; border: 0px; font-weight: inherit; margin-bottom: 12px; outline: 0px; padding: 0px; vertical-align: baseline;"><img loading="lazy" class=" wp-image-258 aligncenter" src="https://stoppi-homemade-physics.de/wp-content/uploads/2021/02/Doppler_HB100_Arduino_c_07-300x225.jpg" alt="" width="704" srcset="https://stoppi-homemade-physics.de/wp-content/uploads/2021/02/Doppler_HB100_Arduino_c_07-300x225.jpg 300w, https://stoppi-homemade-physics.de/wp-content/uploads/2021/02/Doppler_HB100_Arduino_c_07-768x576.jpg 768w, https://stoppi-homemade-physics.de/wp-content/uploads/2021/02/Doppler_HB100_Arduino_c_07-480x360.jpg 480w, https://stoppi-homemade-physics.de/wp-content/uploads/2021/02/Doppler_HB100_Arduino_c_07.jpg 1024w" sizes="(max-width: 704px) 100vw, 704px" style="box-sizing: inherit; border: 0px; font-family: inherit; font-style: inherit; font-weight: inherit; margin: 0px auto 10px; outline: 0px; padding: 0px; vertical-align: baseline; max-width: 100%; height: auto; clear: both; display: block;" /></p>
         <p style="color: #555555; font-family: inherit; font-size: 13px; font-style: inherit; box-sizing: inherit; border: 0px; font-weight: inherit; margin-bottom: 12px; outline: 0px; padding: 0px; vertical-align: baseline;"><iframe loading="lazy" width="673" height="505" src="https://www.youtube.com/embed/TwmwfbFrPk4" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture" allowfullscreen="allowfullscreen" style="box-sizing: inherit; border-width: 0px; border-style: initial; font-family: inherit; font-style: inherit; font-weight: inherit; margin: 0px; outline: 0px; padding: 0px; vertical-align: baseline; max-width: 100%;"></iframe></p>
         <hr style="color: #555555; font-family: Domine, Arial, Helvetica, sans-serif; font-size: 13px; font-style: inherit; box-sizing: content-box; height: 1px; background-color: #cccccc; border: 0px; margin-bottom: 1.5em;" />
         <p style="color: #555555; font-family: inherit; font-size: 13px; font-style: inherit; box-sizing: inherit; border: 0px; font-weight: inherit; margin-bottom: 12px; outline: 0px; padding: 0px; vertical-align: baseline;">Arduino-Code:</p>
         <p style="box-sizing: inherit; border: 0px; margin-bottom: 12px; outline: 0px; padding: 0px; vertical-align: baseline;"><font color="#555555" face="Domine, Arial, Helvetica, sans-serif"><span style="font-size: 13px;">/* FreqMeasure - Example with LCD output</span></font></p>
         <p style="box-sizing: inherit; border: 0px; margin-bottom: 12px; outline: 0px; padding: 0px; vertical-align: baseline;"><font color="#555555" face="Domine, Arial, Helvetica, sans-serif"><span style="font-size: 13px;">&nbsp;* http://www.pjrc.com/teensy/td_libs_FreqMeasure.html</span></font></p>
         <p style="box-sizing: inherit; border: 0px; margin-bottom: 12px; outline: 0px; padding: 0px; vertical-align: baseline;"><font color="#555555" face="Domine, Arial, Helvetica, sans-serif"><span style="font-size: 13px;">&nbsp;*&nbsp;</span></font></p>
         <p style="box-sizing: inherit; border: 0px; margin-bottom: 12px; outline: 0px; padding: 0px; vertical-align: baseline;"><font color="#555555" face="Domine, Arial, Helvetica, sans-serif"><span style="font-size: 13px;">&nbsp;* Slightly modified by @3zuli for use with HB100 doppler radar module</span></font></p>
         <p style="box-sizing: inherit; border: 0px; margin-bottom: 12px; outline: 0px; padding: 0px; vertical-align: baseline;"><font color="#555555" face="Domine, Arial, Helvetica, sans-serif"><span style="font-size: 13px;">&nbsp;*</span></font></p>
         <p style="box-sizing: inherit; border: 0px; margin-bottom: 12px; outline: 0px; padding: 0px; vertical-align: baseline;"><font color="#555555" face="Domine, Arial, Helvetica, sans-serif"><span style="font-size: 13px;">&nbsp;* This example code is in the public domain.</span></font></p>
         <p style="box-sizing: inherit; border: 0px; margin-bottom: 12px; outline: 0px; padding: 0px; vertical-align: baseline;"><font color="#555555" face="Domine, Arial, Helvetica, sans-serif"><span style="font-size: 13px;">&nbsp;*</span></font></p>
         <p style="box-sizing: inherit; border: 0px; margin-bottom: 12px; outline: 0px; padding: 0px; vertical-align: baseline;"><font color="#555555" face="Domine, Arial, Helvetica, sans-serif"><span style="font-size: 13px;">&nbsp;* Frequency input pin: 8. Connect the IF pin from the preamp board to this pin.</span></font></p>
         <p style="box-sizing: inherit; border: 0px; margin-bottom: 12px; outline: 0px; padding: 0px; vertical-align: baseline;"><font color="#555555" face="Domine, Arial, Helvetica, sans-serif"><span style="font-size: 13px;">&nbsp;* This should work with Arduino Uno, Nano, Pro mini and simillar.</span></font></p>
         <p style="box-sizing: inherit; border: 0px; margin-bottom: 12px; outline: 0px; padding: 0px; vertical-align: baseline;"><font color="#555555" face="Domine, Arial, Helvetica, sans-serif"><span style="font-size: 13px;">&nbsp;* For other boards, see the FreqMeasure documentation (link above).</span></font></p>
         <p style="box-sizing: inherit; border: 0px; margin-bottom: 12px; outline: 0px; padding: 0px; vertical-align: baseline;"><font color="#555555" face="Domine, Arial, Helvetica, sans-serif"><span style="font-size: 13px;">&nbsp;*</span></font></p>
         <p style="box-sizing: inherit; border: 0px; margin-bottom: 12px; outline: 0px; padding: 0px; vertical-align: baseline;"><font color="#555555" face="Domine, Arial, Helvetica, sans-serif"><span style="font-size: 13px;">&nbsp;*/</span></font></p>
         <p style="box-sizing: inherit; border: 0px; margin-bottom: 12px; outline: 0px; padding: 0px; vertical-align: baseline;"><font color="#555555" face="Domine, Arial, Helvetica, sans-serif"><span style="font-size: 13px;">&nbsp;</span></font></p>
         <p style="box-sizing: inherit; border: 0px; margin-bottom: 12px; outline: 0px; padding: 0px; vertical-align: baseline;"><font color="#555555" face="Domine, Arial, Helvetica, sans-serif"><span style="font-size: 13px;">#include &lt;Wire.h&gt;</span></font></p>
         <p style="box-sizing: inherit; border: 0px; margin-bottom: 12px; outline: 0px; padding: 0px; vertical-align: baseline;"><font color="#555555" face="Domine, Arial, Helvetica, sans-serif"><span style="font-size: 13px;">#include &lt;FreqMeasure.h&gt;</span></font></p>
         <p style="box-sizing: inherit; border: 0px; margin-bottom: 12px; outline: 0px; padding: 0px; vertical-align: baseline;"><font color="#555555" face="Domine, Arial, Helvetica, sans-serif"><span style="font-size: 13px;">#include &lt;LiquidCrystal_I2C.h&gt;</span></font></p>
         <p style="box-sizing: inherit; border: 0px; margin-bottom: 12px; outline: 0px; padding: 0px; vertical-align: baseline;"><font color="#555555" face="Domine, Arial, Helvetica, sans-serif"><span style="font-size: 13px;"><br /></span></font></p>
         <p style="box-sizing: inherit; border: 0px; margin-bottom: 12px; outline: 0px; padding: 0px; vertical-align: baseline;"><font color="#555555" face="Domine, Arial, Helvetica, sans-serif"><span style="font-size: 13px;">//LiquidCrystal_I2C lcd(0x27,16,2);&nbsp; // set the LCD address to 0x27 for a 16 chars and 2 line display. ACHTUNG: Adresse kann auch 0x3F sein !!!</span></font></p>
         <p style="box-sizing: inherit; border: 0px; margin-bottom: 12px; outline: 0px; padding: 0px; vertical-align: baseline;"><font color="#555555" face="Domine, Arial, Helvetica, sans-serif"><span style="font-size: 13px;">LiquidCrystal_I2C lcd(0x3F,16,2);</span></font></p>
         <p style="box-sizing: inherit; border: 0px; margin-bottom: 12px; outline: 0px; padding: 0px; vertical-align: baseline;"><font color="#555555" face="Domine, Arial, Helvetica, sans-serif"><span style="font-size: 13px;"><br /></span></font></p>
         <p style="box-sizing: inherit; border: 0px; margin-bottom: 12px; outline: 0px; padding: 0px; vertical-align: baseline;"><font color="#555555" face="Domine, Arial, Helvetica, sans-serif"><span style="font-size: 13px;">// Anschlüsse:</span></font></p>
         <p style="box-sizing: inherit; border: 0px; margin-bottom: 12px; outline: 0px; padding: 0px; vertical-align: baseline;"><font color="#555555" face="Domine, Arial, Helvetica, sans-serif"><span style="font-size: 13px;">// GND - GND</span></font></p>
         <p style="box-sizing: inherit; border: 0px; margin-bottom: 12px; outline: 0px; padding: 0px; vertical-align: baseline;"><font color="#555555" face="Domine, Arial, Helvetica, sans-serif"><span style="font-size: 13px;">// VCC - 5V</span></font></p>
         <p style="box-sizing: inherit; border: 0px; margin-bottom: 12px; outline: 0px; padding: 0px; vertical-align: baseline;"><font color="#555555" face="Domine, Arial, Helvetica, sans-serif"><span style="font-size: 13px;">// SDA - ANALOG Pin 4</span></font></p>
         <p style="box-sizing: inherit; border: 0px; margin-bottom: 12px; outline: 0px; padding: 0px; vertical-align: baseline;"><font color="#555555" face="Domine, Arial, Helvetica, sans-serif"><span style="font-size: 13px;">// SCL - ANALOG pin 5</span></font></p>
         <p style="box-sizing: inherit; border: 0px; margin-bottom: 12px; outline: 0px; padding: 0px; vertical-align: baseline;"><font color="#555555" face="Domine, Arial, Helvetica, sans-serif"><span style="font-size: 13px;"><br /></span></font></p>
         <p style="box-sizing: inherit; border: 0px; margin-bottom: 12px; outline: 0px; padding: 0px; vertical-align: baseline;"><font color="#555555" face="Domine, Arial, Helvetica, sans-serif"><span style="font-size: 13px;"><br /></span></font></p>
         <p style="box-sizing: inherit; border: 0px; margin-bottom: 12px; outline: 0px; padding: 0px; vertical-align: baseline;"><font color="#555555" face="Domine, Arial, Helvetica, sans-serif"><span style="font-size: 13px;">double sum = 0;</span></font></p>
         <p style="box-sizing: inherit; border: 0px; margin-bottom: 12px; outline: 0px; padding: 0px; vertical-align: baseline;"><font color="#555555" face="Domine, Arial, Helvetica, sans-serif"><span style="font-size: 13px;">int count = 0;</span></font></p>
         <p style="box-sizing: inherit; border: 0px; margin-bottom: 12px; outline: 0px; padding: 0px; vertical-align: baseline;"><font color="#555555" face="Domine, Arial, Helvetica, sans-serif"><span style="font-size: 13px;"><br /></span></font></p>
         <p style="box-sizing: inherit; border: 0px; margin-bottom: 12px; outline: 0px; padding: 0px; vertical-align: baseline;"><font color="#555555" face="Domine, Arial, Helvetica, sans-serif"><span style="font-size: 13px;">float f;&nbsp; &nbsp;// Frequenz</span></font></p>
         <p style="box-sizing: inherit; border: 0px; margin-bottom: 12px; outline: 0px; padding: 0px; vertical-align: baseline;"><font color="#555555" face="Domine, Arial, Helvetica, sans-serif"><span style="font-size: 13px;">float v;&nbsp; &nbsp;// Geschwindigkeit</span></font></p>
         <p style="box-sizing: inherit; border: 0px; margin-bottom: 12px; outline: 0px; padding: 0px; vertical-align: baseline;"><font color="#555555" face="Domine, Arial, Helvetica, sans-serif"><span style="font-size: 13px;"><br /></span></font></p>
         <p style="box-sizing: inherit; border: 0px; margin-bottom: 12px; outline: 0px; padding: 0px; vertical-align: baseline;"><font color="#555555" face="Domine, Arial, Helvetica, sans-serif"><span style="font-size: 13px;"><br /></span></font></p>
         <p style="box-sizing: inherit; border: 0px; margin-bottom: 12px; outline: 0px; padding: 0px; vertical-align: baseline;"><font color="#555555" face="Domine, Arial, Helvetica, sans-serif"><span style="font-size: 13px;">// ========================</span></font></p>
         <p style="box-sizing: inherit; border: 0px; margin-bottom: 12px; outline: 0px; padding: 0px; vertical-align: baseline;"><font color="#555555" face="Domine, Arial, Helvetica, sans-serif"><span style="font-size: 13px;">// ======== SETUP =========</span></font></p>
         <p style="box-sizing: inherit; border: 0px; margin-bottom: 12px; outline: 0px; padding: 0px; vertical-align: baseline;"><font color="#555555" face="Domine, Arial, Helvetica, sans-serif"><span style="font-size: 13px;">// ========================</span></font></p>
         <p style="box-sizing: inherit; border: 0px; margin-bottom: 12px; outline: 0px; padding: 0px; vertical-align: baseline;"><font color="#555555" face="Domine, Arial, Helvetica, sans-serif"><span style="font-size: 13px;"><br /></span></font></p>
         <p style="box-sizing: inherit; border: 0px; margin-bottom: 12px; outline: 0px; padding: 0px; vertical-align: baseline;"><font color="#555555" face="Domine, Arial, Helvetica, sans-serif"><span style="font-size: 13px;">void setup()</span></font></p>
         <p style="box-sizing: inherit; border: 0px; margin-bottom: 12px; outline: 0px; padding: 0px; vertical-align: baseline;"><font color="#555555" face="Domine, Arial, Helvetica, sans-serif"><span style="font-size: 13px;">&nbsp; &nbsp;{</span></font></p>
         <p style="box-sizing: inherit; border: 0px; margin-bottom: 12px; outline: 0px; padding: 0px; vertical-align: baseline;"><font color="#555555" face="Domine, Arial, Helvetica, sans-serif"><span style="font-size: 13px;">&nbsp; &nbsp; Serial.begin(57600);</span></font></p>
         <p style="box-sizing: inherit; border: 0px; margin-bottom: 12px; outline: 0px; padding: 0px; vertical-align: baseline;"><font color="#555555" face="Domine, Arial, Helvetica, sans-serif"><span style="font-size: 13px;">&nbsp; &nbsp;&nbsp;</span></font></p>
         <p style="box-sizing: inherit; border: 0px; margin-bottom: 12px; outline: 0px; padding: 0px; vertical-align: baseline;"><font color="#555555" face="Domine, Arial, Helvetica, sans-serif"><span style="font-size: 13px;">&nbsp; &nbsp; lcd.init();&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; // initialize the lcd</span></font></p>
         <p style="box-sizing: inherit; border: 0px; margin-bottom: 12px; outline: 0px; padding: 0px; vertical-align: baseline;"><font color="#555555" face="Domine, Arial, Helvetica, sans-serif"><span style="font-size: 13px;"><br /></span></font></p>
         <p style="box-sizing: inherit; border: 0px; margin-bottom: 12px; outline: 0px; padding: 0px; vertical-align: baseline;"><font color="#555555" face="Domine, Arial, Helvetica, sans-serif"><span style="font-size: 13px;">&nbsp; &nbsp; // Print a message to the LCD.</span></font></p>
         <p style="box-sizing: inherit; border: 0px; margin-bottom: 12px; outline: 0px; padding: 0px; vertical-align: baseline;"><font color="#555555" face="Domine, Arial, Helvetica, sans-serif"><span style="font-size: 13px;">&nbsp; &nbsp; lcd.backlight();</span></font></p>
         <p style="box-sizing: inherit; border: 0px; margin-bottom: 12px; outline: 0px; padding: 0px; vertical-align: baseline;"><font color="#555555" face="Domine, Arial, Helvetica, sans-serif"><span style="font-size: 13px;">&nbsp; &nbsp;&nbsp;</span></font></p>
         <p style="box-sizing: inherit; border: 0px; margin-bottom: 12px; outline: 0px; padding: 0px; vertical-align: baseline;"><font color="#555555" face="Domine, Arial, Helvetica, sans-serif"><span style="font-size: 13px;">&nbsp; &nbsp; lcd.setCursor(0,0);</span></font></p>
         <p style="box-sizing: inherit; border: 0px; margin-bottom: 12px; outline: 0px; padding: 0px; vertical-align: baseline;"><font color="#555555" face="Domine, Arial, Helvetica, sans-serif"><span style="font-size: 13px;">&nbsp; &nbsp; lcd.print("Dopplerradar");</span></font></p>
         <p style="box-sizing: inherit; border: 0px; margin-bottom: 12px; outline: 0px; padding: 0px; vertical-align: baseline;"><font color="#555555" face="Domine, Arial, Helvetica, sans-serif"><span style="font-size: 13px;">&nbsp; &nbsp; lcd.setCursor(0,1);</span></font></p>
         <p style="box-sizing: inherit; border: 0px; margin-bottom: 12px; outline: 0px; padding: 0px; vertical-align: baseline;"><font color="#555555" face="Domine, Arial, Helvetica, sans-serif"><span style="font-size: 13px;">&nbsp; &nbsp; lcd.print("Version 1.0");</span></font></p>
         <p style="box-sizing: inherit; border: 0px; margin-bottom: 12px; outline: 0px; padding: 0px; vertical-align: baseline;"><font color="#555555" face="Domine, Arial, Helvetica, sans-serif"><span style="font-size: 13px;">&nbsp; &nbsp;&nbsp;</span></font></p>
         <p style="box-sizing: inherit; border: 0px; margin-bottom: 12px; outline: 0px; padding: 0px; vertical-align: baseline;"><font color="#555555" face="Domine, Arial, Helvetica, sans-serif"><span style="font-size: 13px;">&nbsp; &nbsp; delay(4000);</span></font></p>
         <p style="box-sizing: inherit; border: 0px; margin-bottom: 12px; outline: 0px; padding: 0px; vertical-align: baseline;"><font color="#555555" face="Domine, Arial, Helvetica, sans-serif"><span style="font-size: 13px;">&nbsp; &nbsp;&nbsp;</span></font></p>
         <p style="box-sizing: inherit; border: 0px; margin-bottom: 12px; outline: 0px; padding: 0px; vertical-align: baseline;"><font color="#555555" face="Domine, Arial, Helvetica, sans-serif"><span style="font-size: 13px;">&nbsp; &nbsp; lcd.setCursor(0,0);</span></font></p>
         <p style="box-sizing: inherit; border: 0px; margin-bottom: 12px; outline: 0px; padding: 0px; vertical-align: baseline;"><font color="#555555" face="Domine, Arial, Helvetica, sans-serif"><span style="font-size: 13px;">&nbsp; &nbsp; lcd.print("&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;");</span></font></p>
         <p style="box-sizing: inherit; border: 0px; margin-bottom: 12px; outline: 0px; padding: 0px; vertical-align: baseline;"><font color="#555555" face="Domine, Arial, Helvetica, sans-serif"><span style="font-size: 13px;">&nbsp; &nbsp; lcd.setCursor(0,1);</span></font></p>
         <p style="box-sizing: inherit; border: 0px; margin-bottom: 12px; outline: 0px; padding: 0px; vertical-align: baseline;"><font color="#555555" face="Domine, Arial, Helvetica, sans-serif"><span style="font-size: 13px;">&nbsp; &nbsp; lcd.print("&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;");&nbsp;&nbsp;</span></font></p>
         <p style="box-sizing: inherit; border: 0px; margin-bottom: 12px; outline: 0px; padding: 0px; vertical-align: baseline;"><font color="#555555" face="Domine, Arial, Helvetica, sans-serif"><span style="font-size: 13px;">&nbsp; &nbsp;&nbsp;</span></font></p>
         <p style="box-sizing: inherit; border: 0px; margin-bottom: 12px; outline: 0px; padding: 0px; vertical-align: baseline;"><font color="#555555" face="Domine, Arial, Helvetica, sans-serif"><span style="font-size: 13px;">&nbsp; &nbsp; lcd.setCursor(0,0);</span></font></p>
         <p style="box-sizing: inherit; border: 0px; margin-bottom: 12px; outline: 0px; padding: 0px; vertical-align: baseline;"><font color="#555555" face="Domine, Arial, Helvetica, sans-serif"><span style="font-size: 13px;">&nbsp; &nbsp; lcd.print("f = ");</span></font></p>
         <p style="box-sizing: inherit; border: 0px; margin-bottom: 12px; outline: 0px; padding: 0px; vertical-align: baseline;"><font color="#555555" face="Domine, Arial, Helvetica, sans-serif"><span style="font-size: 13px;">&nbsp; &nbsp; lcd.setCursor(0,1);</span></font></p>
         <p style="box-sizing: inherit; border: 0px; margin-bottom: 12px; outline: 0px; padding: 0px; vertical-align: baseline;"><font color="#555555" face="Domine, Arial, Helvetica, sans-serif"><span style="font-size: 13px;">&nbsp; &nbsp; lcd.print("v = ");</span></font></p>
         <p style="box-sizing: inherit; border: 0px; margin-bottom: 12px; outline: 0px; padding: 0px; vertical-align: baseline;"><font color="#555555" face="Domine, Arial, Helvetica, sans-serif"><span style="font-size: 13px;">&nbsp; &nbsp;&nbsp;</span></font></p>
         <p style="box-sizing: inherit; border: 0px; margin-bottom: 12px; outline: 0px; padding: 0px; vertical-align: baseline;"><font color="#555555" face="Domine, Arial, Helvetica, sans-serif"><span style="font-size: 13px;">&nbsp; &nbsp; FreqMeasure.begin();</span></font></p>
         <p style="box-sizing: inherit; border: 0px; margin-bottom: 12px; outline: 0px; padding: 0px; vertical-align: baseline;"><font color="#555555" face="Domine, Arial, Helvetica, sans-serif"><span style="font-size: 13px;">&nbsp; &nbsp;}</span></font></p>
         <p style="box-sizing: inherit; border: 0px; margin-bottom: 12px; outline: 0px; padding: 0px; vertical-align: baseline;"><font color="#555555" face="Domine, Arial, Helvetica, sans-serif"><span style="font-size: 13px;"><br /></span></font></p>
         <p style="box-sizing: inherit; border: 0px; margin-bottom: 12px; outline: 0px; padding: 0px; vertical-align: baseline;"><font color="#555555" face="Domine, Arial, Helvetica, sans-serif"><span style="font-size: 13px;"><br /></span></font></p>
         <p style="box-sizing: inherit; border: 0px; margin-bottom: 12px; outline: 0px; padding: 0px; vertical-align: baseline;"><font color="#555555" face="Domine, Arial, Helvetica, sans-serif"><span style="font-size: 13px;">// ================================</span></font></p>
         <p style="box-sizing: inherit; border: 0px; margin-bottom: 12px; outline: 0px; padding: 0px; vertical-align: baseline;"><font color="#555555" face="Domine, Arial, Helvetica, sans-serif"><span style="font-size: 13px;">// ======== HAUPTSCHLEIFE =========</span></font></p>
         <p style="box-sizing: inherit; border: 0px; margin-bottom: 12px; outline: 0px; padding: 0px; vertical-align: baseline;"><font color="#555555" face="Domine, Arial, Helvetica, sans-serif"><span style="font-size: 13px;">// ================================</span></font></p>
         <p style="box-sizing: inherit; border: 0px; margin-bottom: 12px; outline: 0px; padding: 0px; vertical-align: baseline;"><font color="#555555" face="Domine, Arial, Helvetica, sans-serif"><span style="font-size: 13px;"><br /></span></font></p>
         <p style="box-sizing: inherit; border: 0px; margin-bottom: 12px; outline: 0px; padding: 0px; vertical-align: baseline;"><font color="#555555" face="Domine, Arial, Helvetica, sans-serif"><span style="font-size: 13px;">void loop()</span></font></p>
         <p style="box-sizing: inherit; border: 0px; margin-bottom: 12px; outline: 0px; padding: 0px; vertical-align: baseline;"><font color="#555555" face="Domine, Arial, Helvetica, sans-serif"><span style="font-size: 13px;">&nbsp; &nbsp;{</span></font></p>
         <p style="box-sizing: inherit; border: 0px; margin-bottom: 12px; outline: 0px; padding: 0px; vertical-align: baseline;"><font color="#555555" face="Domine, Arial, Helvetica, sans-serif"><span style="font-size: 13px;">&nbsp; &nbsp; if (FreqMeasure.available())</span></font></p>
         <p style="box-sizing: inherit; border: 0px; margin-bottom: 12px; outline: 0px; padding: 0px; vertical-align: baseline;"><font color="#555555" face="Domine, Arial, Helvetica, sans-serif"><span style="font-size: 13px;">&nbsp; &nbsp; &nbsp; &nbsp;{</span></font></p>
         <p style="box-sizing: inherit; border: 0px; margin-bottom: 12px; outline: 0px; padding: 0px; vertical-align: baseline;"><font color="#555555" face="Domine, Arial, Helvetica, sans-serif"><span style="font-size: 13px;">&nbsp; &nbsp; &nbsp; &nbsp; // average the readings together</span></font></p>
         <p style="box-sizing: inherit; border: 0px; margin-bottom: 12px; outline: 0px; padding: 0px; vertical-align: baseline;"><font color="#555555" face="Domine, Arial, Helvetica, sans-serif"><span style="font-size: 13px;">&nbsp; &nbsp; &nbsp; &nbsp; sum = sum + FreqMeasure.read();</span></font></p>
         <p style="box-sizing: inherit; border: 0px; margin-bottom: 12px; outline: 0px; padding: 0px; vertical-align: baseline;"><font color="#555555" face="Domine, Arial, Helvetica, sans-serif"><span style="font-size: 13px;">&nbsp; &nbsp; &nbsp; &nbsp;&nbsp;</span></font></p>
         <p style="box-sizing: inherit; border: 0px; margin-bottom: 12px; outline: 0px; padding: 0px; vertical-align: baseline;"><font color="#555555" face="Domine, Arial, Helvetica, sans-serif"><span style="font-size: 13px;">&nbsp; &nbsp; &nbsp; &nbsp; count = count + 1;</span></font></p>
         <p style="box-sizing: inherit; border: 0px; margin-bottom: 12px; outline: 0px; padding: 0px; vertical-align: baseline;"><font color="#555555" face="Domine, Arial, Helvetica, sans-serif"><span style="font-size: 13px;">&nbsp; &nbsp;&nbsp;</span></font></p>
         <p style="box-sizing: inherit; border: 0px; margin-bottom: 12px; outline: 0px; padding: 0px; vertical-align: baseline;"><font color="#555555" face="Domine, Arial, Helvetica, sans-serif"><span style="font-size: 13px;">&nbsp; &nbsp; &nbsp; &nbsp; if (count &gt;= 10)</span></font></p>
         <p style="box-sizing: inherit; border: 0px; margin-bottom: 12px; outline: 0px; padding: 0px; vertical-align: baseline;"><font color="#555555" face="Domine, Arial, Helvetica, sans-serif"><span style="font-size: 13px;">&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;{</span></font></p>
         <p style="box-sizing: inherit; border: 0px; margin-bottom: 12px; outline: 0px; padding: 0px; vertical-align: baseline;"><font color="#555555" face="Domine, Arial, Helvetica, sans-serif"><span style="font-size: 13px;">&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; f = FreqMeasure.countToFrequency(sum / count);</span></font></p>
         <p style="box-sizing: inherit; border: 0px; margin-bottom: 12px; outline: 0px; padding: 0px; vertical-align: baseline;"><font color="#555555" face="Domine, Arial, Helvetica, sans-serif"><span style="font-size: 13px;">&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp;</span></font></p>
         <p style="box-sizing: inherit; border: 0px; margin-bottom: 12px; outline: 0px; padding: 0px; vertical-align: baseline;"><font color="#555555" face="Domine, Arial, Helvetica, sans-serif"><span style="font-size: 13px;">&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; v = f / 19.49;&nbsp; &nbsp; &nbsp; &nbsp;// conversion from frequency to kilometers per hour</span></font></p>
         <p style="box-sizing: inherit; border: 0px; margin-bottom: 12px; outline: 0px; padding: 0px; vertical-align: baseline;"><font color="#555555" face="Domine, Arial, Helvetica, sans-serif"><span style="font-size: 13px;">&nbsp; &nbsp; &nbsp;&nbsp;</span></font></p>
         <p style="box-sizing: inherit; border: 0px; margin-bottom: 12px; outline: 0px; padding: 0px; vertical-align: baseline;"><font color="#555555" face="Domine, Arial, Helvetica, sans-serif"><span style="font-size: 13px;">&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; lcd.setCursor(4,0);</span></font></p>
         <p style="box-sizing: inherit; border: 0px; margin-bottom: 12px; outline: 0px; padding: 0px; vertical-align: baseline;"><font color="#555555" face="Domine, Arial, Helvetica, sans-serif"><span style="font-size: 13px;">&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; lcd.print("&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; ");</span></font></p>
         <p style="box-sizing: inherit; border: 0px; margin-bottom: 12px; outline: 0px; padding: 0px; vertical-align: baseline;"><font color="#555555" face="Domine, Arial, Helvetica, sans-serif"><span style="font-size: 13px;">&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; lcd.setCursor(4,0);</span></font></p>
         <p style="box-sizing: inherit; border: 0px; margin-bottom: 12px; outline: 0px; padding: 0px; vertical-align: baseline;"><font color="#555555" face="Domine, Arial, Helvetica, sans-serif"><span style="font-size: 13px;">&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; lcd.print(f);</span></font></p>
         <p style="box-sizing: inherit; border: 0px; margin-bottom: 12px; outline: 0px; padding: 0px; vertical-align: baseline;"><font color="#555555" face="Domine, Arial, Helvetica, sans-serif"><span style="font-size: 13px;">&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; lcd.print(" Hz");</span></font></p>
         <p style="box-sizing: inherit; border: 0px; margin-bottom: 12px; outline: 0px; padding: 0px; vertical-align: baseline;"><font color="#555555" face="Domine, Arial, Helvetica, sans-serif"><span style="font-size: 13px;">&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp;</span></font></p>
         <p style="box-sizing: inherit; border: 0px; margin-bottom: 12px; outline: 0px; padding: 0px; vertical-align: baseline;"><font color="#555555" face="Domine, Arial, Helvetica, sans-serif"><span style="font-size: 13px;">&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; lcd.setCursor(4,1);</span></font></p>
         <p style="box-sizing: inherit; border: 0px; margin-bottom: 12px; outline: 0px; padding: 0px; vertical-align: baseline;"><font color="#555555" face="Domine, Arial, Helvetica, sans-serif"><span style="font-size: 13px;">&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; lcd.print("&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; ");</span></font></p>
         <p style="box-sizing: inherit; border: 0px; margin-bottom: 12px; outline: 0px; padding: 0px; vertical-align: baseline;"><font color="#555555" face="Domine, Arial, Helvetica, sans-serif"><span style="font-size: 13px;">&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; lcd.setCursor(4,1);</span></font></p>
         <p style="box-sizing: inherit; border: 0px; margin-bottom: 12px; outline: 0px; padding: 0px; vertical-align: baseline;"><font color="#555555" face="Domine, Arial, Helvetica, sans-serif"><span style="font-size: 13px;">&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; lcd.print(v);</span></font></p>
         <p style="box-sizing: inherit; border: 0px; margin-bottom: 12px; outline: 0px; padding: 0px; vertical-align: baseline;"><font color="#555555" face="Domine, Arial, Helvetica, sans-serif"><span style="font-size: 13px;">&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; lcd.print(" km/h");</span></font></p>
         <p style="box-sizing: inherit; border: 0px; margin-bottom: 12px; outline: 0px; padding: 0px; vertical-align: baseline;"><font color="#555555" face="Domine, Arial, Helvetica, sans-serif"><span style="font-size: 13px;">&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp;</span></font></p>
         <p style="box-sizing: inherit; border: 0px; margin-bottom: 12px; outline: 0px; padding: 0px; vertical-align: baseline;"><font color="#555555" face="Domine, Arial, Helvetica, sans-serif"><span style="font-size: 13px;">&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; Serial.print("v = ");</span></font></p>
         <p style="box-sizing: inherit; border: 0px; margin-bottom: 12px; outline: 0px; padding: 0px; vertical-align: baseline;"><font color="#555555" face="Domine, Arial, Helvetica, sans-serif"><span style="font-size: 13px;">&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; Serial.println(v,1);</span></font></p>
         <p style="box-sizing: inherit; border: 0px; margin-bottom: 12px; outline: 0px; padding: 0px; vertical-align: baseline;"><font color="#555555" face="