{"id":86,"date":"2017-06-04T10:39:57","date_gmt":"2017-06-04T10:39:57","guid":{"rendered":"http:\/\/fambach.net\/?p=86"},"modified":"2026-10-18T21:43:00","modified_gmt":"2026-10-18T21:43:00","slug":"sr-04-ultraschall-entfernungsmesser","status":"publish","type":"post","link":"https:\/\/www.fambach.net\/en\/sr-04-ultraschall-entfernungsmesser\/","title":{"rendered":"HC-SR04 Distance Sensor"},"content":{"rendered":"<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_89 ez-toc-wrap-left counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Contents\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewbox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewbox=\"0 0 24 24\" version=\"1.2\" baseprofile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/www.fambach.net\/en\/us-015-ultraschall-entfernungsmesser\/#Ansichten\" >Views<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/www.fambach.net\/en\/us-015-ultraschall-entfernungsmesser\/#Technische_Daten\" >Technical Data<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/www.fambach.net\/en\/us-015-ultraschall-entfernungsmesser\/#Pin-Belegung\" >Pin assignment<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/www.fambach.net\/en\/us-015-ultraschall-entfernungsmesser\/#Funktionsweise\" >How it works<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/www.fambach.net\/en\/us-015-ultraschall-entfernungsmesser\/#Probleme\" >Problems<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/www.fambach.net\/en\/us-015-ultraschall-entfernungsmesser\/#Echo_kommt_nicht_bei_weiten_Strecken\" >Echo does not come through on long distances<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/www.fambach.net\/en\/us-015-ultraschall-entfernungsmesser\/#Sonstiges\" >Miscellaneous<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/www.fambach.net\/en\/us-015-ultraschall-entfernungsmesser\/#HC-SR04_im_3_pin_Betrieb\" >HC-SR04 in 3-pin operation<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/www.fambach.net\/en\/us-015-ultraschall-entfernungsmesser\/#Fazit\" >Conclusion<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/www.fambach.net\/en\/us-015-ultraschall-entfernungsmesser\/#Verwandte_Links\" >Related links<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/www.fambach.net\/en\/us-015-ultraschall-entfernungsmesser\/#Quellen\" >Sources<\/a><\/li><\/ul><\/nav><\/div>\n\n<p class=\"wp-block-paragraph\">Der HC-SR04 ist ein weitverbreiteter Entfernungssensor und dementsprechend g\u00fcnstig. Er bestimmt die Entfernung mittels Ultraschall und ist leicht mit bekannten 5V Microcontrollern zu betreiben. <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Bei der maximalen Entfernungsangabe widersprechen sich die Datenbl\u00e4tter und schwanken zwischen 3 und 4 Metern. Ich habe bis jetzt noch kein Modul in der Hand gehabt, welches die 4m erreicht. Bei 3m war bei meinen Modulen Schluss. <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Here, as always, is just a brief overview, with a few good posts linked below for details.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"ansichten\"><span class=\"ez-toc-section\" id=\"Ansichten\"><\/span>Views<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<figure class=\"wp-block-gallery has-nested-images columns-2 is-cropped wp-block-gallery-1 is-layout-flex wp-block-gallery-is-layout-flex\">\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"603\" data-id=\"5116\" src=\"https:\/\/www.fambach.net\/wp-content\/uploads\/20200329_195844-1024x603.jpg\" alt=\"HC-SR04 von vorne\" class=\"wp-image-5116\" srcset=\"https:\/\/www.fambach.net\/wp-content\/uploads\/20200329_195844-1024x603.jpg 1024w, https:\/\/www.fambach.net\/wp-content\/uploads\/20200329_195844-18x12.jpg 18w, https:\/\/www.fambach.net\/wp-content\/uploads\/20200329_195844-300x177.jpg 300w, https:\/\/www.fambach.net\/wp-content\/uploads\/20200329_195844-768x452.jpg 768w, https:\/\/www.fambach.net\/wp-content\/uploads\/20200329_195844-1536x905.jpg 1536w, https:\/\/www.fambach.net\/wp-content\/uploads\/20200329_195844.jpg 1917w\" sizes=\"auto, (max-width: 599px) calc(100vw - 50px), (max-width: 767px) calc(100vw - 70px), (max-width: 991px) 429px, (max-width: 1199px) 637px, 354px\"><figcaption class=\"wp-element-caption\">HC-SR04 from the front<\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"627\" data-id=\"5118\" src=\"https:\/\/www.fambach.net\/wp-content\/uploads\/20200329_195727-1024x627.jpg\" alt=\"HC-SR04 von hinten\" class=\"wp-image-5118\" srcset=\"https:\/\/www.fambach.net\/wp-content\/uploads\/20200329_195727-1024x627.jpg 1024w, https:\/\/www.fambach.net\/wp-content\/uploads\/20200329_195727-18x12.jpg 18w, https:\/\/www.fambach.net\/wp-content\/uploads\/20200329_195727-300x184.jpg 300w, https:\/\/www.fambach.net\/wp-content\/uploads\/20200329_195727-768x470.jpg 768w, https:\/\/www.fambach.net\/wp-content\/uploads\/20200329_195727.jpg 1303w\" sizes=\"auto, (max-width: 599px) calc(100vw - 50px), (max-width: 767px) calc(100vw - 70px), (max-width: 991px) 429px, (max-width: 1199px) 637px, 354px\"><figcaption class=\"wp-element-caption\">HC-SR04 from behind<\/figcaption><\/figure>\n<\/figure>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"technische-daten\"><span class=\"ez-toc-section\" id=\"Technische_Daten\"><\/span>Technical Data<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n<div class=\"taxmod-record-block wp-block-taxmod-record\"><div class=\"taxmod-comparison-wrap\"><table class=\"taxmod-comparison\"><thead><tr><th><\/th><th class=\"taxmod-comparison-value taxmod-comparison-main\">HC-SR04<\/th><\/tr><\/thead><tbody><tr class=\"taxmod-comparison-group\"><td class=\"taxmod-comparison-term\">Messgr\u00f6\u00dfe<\/td><td class=\"taxmod-comparison-value taxmod-comparison-main\">Entfernung<\/td><\/tr><tr class=\"taxmod-comparison-group\"><td class=\"taxmod-comparison-term\">Messprinzip<\/td><td class=\"taxmod-comparison-value taxmod-comparison-main\">Sonar<\/td><\/tr><tr class=\"taxmod-comparison-group\"><td class=\"taxmod-comparison-term\">Messbereich<\/td><td class=\"taxmod-comparison-value taxmod-comparison-main\">20\u20134000 mm<\/td><\/tr><tr class=\"taxmod-comparison-group\"><td class=\"taxmod-comparison-term\">Accuracy<\/td><td class=\"taxmod-comparison-value taxmod-comparison-main\">3 mm<\/td><\/tr><tr class=\"taxmod-comparison-group\"><td class=\"taxmod-comparison-term\">\u00d6ffnungswinkel<\/td><td class=\"taxmod-comparison-value taxmod-comparison-main\">15\u00b0<\/td><\/tr><tr class=\"taxmod-comparison-group\"><td class=\"taxmod-comparison-term\">Frequenz\/Wellenl\u00e4nge<\/td><td class=\"taxmod-comparison-value taxmod-comparison-main\">40 kHz<\/td><\/tr><tr class=\"taxmod-comparison-group\"><td class=\"taxmod-comparison-term\">Operating voltage<\/td><td class=\"taxmod-comparison-value taxmod-comparison-main\">5 V<\/td><\/tr><tr class=\"taxmod-comparison-group\"><td class=\"taxmod-comparison-term\">Stromaufnahme<\/td><td class=\"taxmod-comparison-value taxmod-comparison-main\">15 mA<\/td><\/tr><tr class=\"taxmod-comparison-group\"><td class=\"taxmod-comparison-term\">Schnittstellen<\/td><td class=\"taxmod-comparison-value taxmod-comparison-main\">TTL Pegel Trigger\/Echo<\/td><\/tr><tr class=\"taxmod-comparison-group\"><td class=\"taxmod-comparison-term\">Abmessungen<\/td><td class=\"taxmod-comparison-value taxmod-comparison-main\">45 \u00d7 20 \u00d7 15 mm<\/td><\/tr><tr class=\"taxmod-comparison-group\"><td class=\"taxmod-comparison-term\">Weight<\/td><td class=\"taxmod-comparison-value taxmod-comparison-main\">8,7 g<\/td><\/tr><tr class=\"taxmod-comparison-group\"><td class=\"taxmod-comparison-term\">Description<\/td><td class=\"taxmod-comparison-value taxmod-comparison-main\">Ultraschall-Entfernungssensor<\/td><\/tr><\/tbody><\/table><\/div><\/div>\n\n\n<h3 class=\"wp-block-heading\" id=\"pin-belegung\"><span class=\"ez-toc-section\" id=\"Pin-Belegung\"><\/span>Pin assignment<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<ol class=\"wp-block-list\">\n<li>Supply voltage 5V<\/li>\n\n\n\n<li>Trigger<\/li>\n\n\n\n<li>Echo (\u201eEmpf\u00e4nger\u201c)<\/li>\n\n\n\n<li>Mass<\/li>\n<\/ol>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"funktionsweise\"><span class=\"ez-toc-section\" id=\"Funktionsweise\"><\/span>How it works<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u00dcber den Trigger Pin wird ein kurzer Impuls gesendet. Dieser l\u00f6st ein Ultraschall Signal aus. Wird dieses Signal von einer Fl\u00e4che reflektiert und vom Empf\u00e4nger auf dem Modul wieder empfangen, wird der Echo Pin auf High gesetzt. Durch die Zeitmessung vom Senden des Impulses bis zum Empfang kann mit Hilfe der Schallgeschwindigkeit die Strecke (Entfernung) berechnet werden.<\/p>\n\n\n\n<a title=\"Alfaomega \/ CC BY-SA 3.0 DE (https:\/\/creativecommons.org\/licenses\/by-sa\/3.0\/de\/deed.en)\" href=\"https:\/\/commons.wikimedia.org\/wiki\/File:Dibujo_Prinzip_Ultraschall.PNG\"><img decoding=\"async\" alt=\"Dibujo Prinzip Ultraschall\" src=\"https:\/\/upload.wikimedia.org\/wikipedia\/commons\/5\/5d\/Dibujo_Prinzip_Ultraschall.PNG\"><\/a>\n\n\n\n<p class=\"wp-block-paragraph\">Echo transit time behaviour of ultrasound <br>Source: <span class=\"ub-content-link ub-content-link--ok ub-content-link--status-after\"><a href=\"https:\/\/de.wikipedia.org\/\" class=\"ub-content-link__anchor\">https:\/\/de.wikipedia.org\/<\/a><span class=\"ub-status ub-status--ok\" title=\"Link status: OK\"><span class=\"ub-status__icon\" aria-hidden=\"true\">\u25cf<\/span><span class=\"screen-reader-text\">Link status: OK<\/span><\/span><\/span> (<span class=\"ub-content-link ub-content-link--ok ub-content-link--status-after\"><a rel=\"noreferrer noopener\" href=\"https:\/\/creativecommons.org\/licenses\/by-sa\/3.0\/de\/deed.en\" target=\"_blank\" class=\"ub-content-link__anchor\">CC BY-SA 3.0 de<\/a><span class=\"ub-status ub-status--ok\" title=\"Link status: OK\"><span class=\"ub-status__icon\" aria-hidden=\"true\">\u25cf<\/span><span class=\"screen-reader-text\">Link status: OK<\/span><\/span><\/span>)<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"probleme\"><span class=\"ez-toc-section\" id=\"Probleme\"><\/span>Problems<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"echo-kommt-nicht-bei-weiten-strecken\"><span class=\"ez-toc-section\" id=\"Echo_kommt_nicht_bei_weiten_Strecken\"><\/span>Echo does not come through on long distances<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">With some Chinese products, there appears to be an error in the SR04. In this case, over long distances, when no echo ultrasonic signal is received, the echo output is not reset.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Solution 1<\/strong>: Bei Abfrage des Echoimpulses einen Timer setzen. Beispielsweise kann beim Arduino in der Funktion zur Abfrage des Echoimpulses ein Timerwert mit angegeben werden.<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code class=\"\"> pulseIn(ECHO_PIN, HIGH, MAX_TIMER_MS);\n\n<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Solution 2<\/strong>use a different module \ud83d\ude09<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"sonstiges\"><span class=\"ez-toc-section\" id=\"Sonstiges\"><\/span>Miscellaneous<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"hc-sr04-im-3-pin-betrieb\"><span class=\"ez-toc-section\" id=\"HC-SR04_im_3_pin_Betrieb\"><\/span>HC-SR04 in 3-pin operation<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Im folgenden Link wird beschrieben, wie man aus einem HC-SR04 einen Parallax Ping macht.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><span class=\"ub-content-link ub-content-link--unknown ub-content-link--status-after\"><a href=\"https:\/\/www.heise.de\/developer\/artikel\/Arduino-fuer-Fledermaeuse-3221620.html\" class=\"ub-content-link__anchor\">https:\/\/www.heise.de\/developer\/artikel\/Arduino-fuer-Fledermaeuse-3221620.html<\/a><span class=\"ub-status ub-status--unknown\" title=\"Link status: Unknown\"><span class=\"ub-status__icon\" aria-hidden=\"true\">\u25cf<\/span><span class=\"screen-reader-text\">Link status: Unknown<\/span><\/span><\/span><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">(Section: Making a Parallax Ping from an HC-SR04)<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"fazit\"><span class=\"ez-toc-section\" id=\"Fazit\"><\/span>Conclusion<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">G\u00fcnstiges, leicht zu verwendendes Modul. Langsam in Bezug auf IR\/Licht getriebene Sensoren.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"verwandte-links\"><span class=\"ez-toc-section\" id=\"Verwandte_Links\"><\/span>Related links<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n<div class=\"display-posts-listing\"><div class=\"listing-item\"><span class=\"ub-content-link ub-content-link--ok ub-content-link--status-after\"><a class=\"title ub-content-link__anchor\" href=\"https:\/\/www.fambach.net\/en\/ftmini-laser\/\">TF Mini Laser Rangefinder<\/a><span class=\"ub-status ub-status--ok\" title=\"Link status: OK\"><span class=\"ub-status__icon\" aria-hidden=\"true\">\u25cf<\/span><span class=\"screen-reader-text\">Link status: OK<\/span><\/span><\/span><\/div><div class=\"listing-item\"><span class=\"ub-content-link ub-content-link--ok ub-content-link--status-after\"><a class=\"title ub-content-link__anchor\" href=\"https:\/\/www.fambach.net\/en\/gy-530-vl53l0x-laserentfernungsmesser\/\">GY-530 VL53L0X Laser Rangefinder<\/a><span class=\"ub-status ub-status--ok\" title=\"Link status: OK\"><span class=\"ub-status__icon\" aria-hidden=\"true\">\u25cf<\/span><span class=\"screen-reader-text\">Link status: OK<\/span><\/span><\/span><\/div><div class=\"listing-item\"><span class=\"ub-content-link ub-content-link--ok ub-content-link--status-after\"><a class=\"title ub-content-link__anchor\" href=\"https:\/\/www.fambach.net\/en\/rc-auto-mit-ps2-controller\/\">RC car with PS2 controller<\/a><span class=\"ub-status ub-status--ok\" title=\"Link status: OK\"><span class=\"ub-status__icon\" aria-hidden=\"true\">\u25cf<\/span><span class=\"screen-reader-text\">Link status: OK<\/span><\/span><\/span><\/div><div class=\"listing-item\"><span class=\"ub-content-link ub-content-link--unknown ub-content-link--status-after\"><a class=\"title ub-content-link__anchor\" href=\"https:\/\/www.fambach.net\/en\/ardunino-mit-dht10-3\/\">Arduino \u2013 HC-SR04 Entfernungsmesser<\/a><span class=\"ub-status ub-status--unknown\" title=\"Link status: Unknown\"><span class=\"ub-status__icon\" aria-hidden=\"true\">\u25cf<\/span><span class=\"screen-reader-text\">Link status: Unknown<\/span><\/span><\/span><\/div><div class=\"listing-item\"><span class=\"ub-content-link ub-content-link--unknown ub-content-link--status-after\"><a class=\"title ub-content-link__anchor\" href=\"https:\/\/www.fambach.net\/en\/raspberry-pi-3-us-100\/\">Controlling the US-100 distance sensor with a Raspberry Pi 3<\/a><span class=\"ub-status ub-status--unknown\" title=\"Link status: Unknown\"><span class=\"ub-status__icon\" aria-hidden=\"true\">\u25cf<\/span><span class=\"screen-reader-text\">Link status: Unknown<\/span><\/span><\/span><\/div><div class=\"listing-item\"><span class=\"ub-content-link ub-content-link--unknown ub-content-link--status-after\"><a class=\"title ub-content-link__anchor\" href=\"https:\/\/www.fambach.net\/en\/us-100\/\">US-100<\/a><span class=\"ub-status ub-status--unknown\" title=\"Link status: Unknown\"><span class=\"ub-status__icon\" aria-hidden=\"true\">\u25cf<\/span><span class=\"screen-reader-text\">Link status: Unknown<\/span><\/span><\/span><\/div><div class=\"listing-item\"><span class=\"ub-content-link ub-content-link--unknown ub-content-link--status-after\"><a class=\"title ub-content-link__anchor\" href=\"https:\/\/www.fambach.net\/en\/sr-04-ultraschall-entfernungsmesser\/\">HC-SR04 Distance Sensor<\/a><span class=\"ub-status ub-status--unknown\" title=\"Link status: Unknown\"><span class=\"ub-status__icon\" aria-hidden=\"true\">\u25cf<\/span><span class=\"screen-reader-text\">Link status: Unknown<\/span><\/span><\/span><\/div><div class=\"listing-item\"><span class=\"ub-content-link ub-content-link--unknown ub-content-link--status-after\"><a class=\"title ub-content-link__anchor\" href=\"https:\/\/www.fambach.net\/en\/us-015-ultraschall-entfernungsmesser\/\">US-015<\/a><span class=\"ub-status ub-status--unknown\" title=\"Link status: Unknown\"><span class=\"ub-status__icon\" aria-hidden=\"true\">\u25cf<\/span><span class=\"screen-reader-text\">Link status: Unknown<\/span><\/span><\/span><\/div><\/div>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"quellen\"><span class=\"ez-toc-section\" id=\"Quellen\"><\/span>Sources<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><span class=\"ub-content-link ub-content-link--unknown ub-content-link--status-after\"><a href=\"https:\/\/www.mikrocontroller.net\/attachment\/218122\/HC-SR04_ultraschallmodul_beschreibung_3.pdf\" class=\"ub-content-link__anchor\">Datasheet at Microcontroller.net<\/a><span class=\"ub-status ub-status--unknown\" title=\"Link status: Unknown\"><span class=\"ub-status__icon\" aria-hidden=\"true\">\u25cf<\/span><span class=\"screen-reader-text\">Link status: Unknown<\/span><\/span><\/span><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><span class=\"ub-content-link ub-content-link--unknown ub-content-link--status-after\"><a href=\"https:\/\/cdn.sparkfun.com\/datasheets\/Sensors\/Proximity\/HCSR04.pdf\" class=\"ub-content-link__anchor\">Data sheet Sparkfun<\/a><span class=\"ub-status ub-status--unknown\" title=\"Link status: Unknown\"><span class=\"ub-status__icon\" aria-hidden=\"true\">\u25cf<\/span><span class=\"screen-reader-text\">Link status: Unknown<\/span><\/span><\/span><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><span class=\"ub-content-link ub-content-link--unknown ub-content-link--status-after\"><a href=\"http:\/\/stefanfrings.de\/hc-sr04\/index.html\" class=\"ub-content-link__anchor\">http:\/\/stefanfrings.de\/hc-sr04\/index.html<\/a><span class=\"ub-status ub-status--unknown\" title=\"Link status: Unknown\"><span class=\"ub-status__icon\" aria-hidden=\"true\">\u25cf<\/span><span class=\"screen-reader-text\">Link status: Unknown<\/span><\/span><\/span><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><span class=\"ub-content-link ub-content-link--unknown ub-content-link--status-after\"><a href=\"https:\/\/www.heise.de\/developer\/artikel\/Arduino-fuer-Fledermaeuse-3221620.html\" class=\"ub-content-link__anchor\">Belatedly found, truly good Heise article<\/a><span class=\"ub-status ub-status--unknown\" title=\"Link status: Unknown\"><span class=\"ub-status__icon\" aria-hidden=\"true\">\u25cf<\/span><span class=\"screen-reader-text\">Link status: Unknown<\/span><\/span><\/span><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><span class=\"ub-content-link ub-content-link--unknown ub-content-link--status-after\"><a href=\"https:\/\/www.mikrocontroller-elektronik.de\/ultraschallsensor-hc-sr04\/\" class=\"ub-content-link__anchor\">Noch ein Beitrag zum SR04, auch sehr ausf\u00fchrlich<\/a><span class=\"ub-status ub-status--unknown\" title=\"Link status: Unknown\"><span class=\"ub-status__icon\" aria-hidden=\"true\">\u25cf<\/span><span class=\"screen-reader-text\">Link status: Unknown<\/span><\/span><\/span><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><span class=\"ub-content-link ub-content-link--unknown ub-content-link--status-after\"><a href=\"https:\/\/github.com\/rwaldron\/johnny-five\" class=\"ub-content-link__anchor\">Proximity \u2013 HC-SR04 I2C Backpack<\/a><span class=\"ub-status ub-status--unknown\" title=\"Link status: Unknown\"><span class=\"ub-status__icon\" aria-hidden=\"true\">\u25cf<\/span><span class=\"screen-reader-text\">Link status: Unknown<\/span><\/span><\/span><\/p>","protected":false},"excerpt":{"rendered":"<p>Der HC-SR04 ist ein weitverbreiteter Entfernungssensor und dementsprechend g\u00fcnstig. Er bestimmt die Entfernung mittels Ultraschall und ist leicht mit bekannten 5V Microcontrollern zu betreiben. Bei der maximalen Entfernungsangabe widersprechen sich die Datenbl\u00e4tter und schwanken zwischen 3 und 4 Metern. Ich habe bis jetzt noch kein Modul in der Hand gehabt, welches die 4m erreicht. Bei &#8230;<\/p>\n<a href=\"https:\/\/www.fambach.net\/en\/us-015-ultraschall-entfernungsmesser\/\" class=\"read-more-link\">Carry on reading <span class=\"screen-reader-text\">\"US-015\"<\/span> <span class=\"meta-nav\">\u2192<\/span><\/a>","protected":false},"author":1,"featured_media":5117,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_lmt_disableupdate":"","_lmt_disable":"","footnotes":""},"categories":[210],"tags":[65,273,5,7],"class_list":["post-86","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-ultraschallsensoren","tag-entfernungsmessung","tag-hc-sr04","tag-sensor","tag-ultraschallsensoren","penguin-post","penguin-post-not-sticky"],"modified_by":"sfambach","_links":{"self":[{"href":"https:\/\/www.fambach.net\/en\/wp-json\/wp\/v2\/posts\/86","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.fambach.net\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.fambach.net\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.fambach.net\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.fambach.net\/en\/wp-json\/wp\/v2\/comments?post=86"}],"version-history":[{"count":27,"href":"https:\/\/www.fambach.net\/en\/wp-json\/wp\/v2\/posts\/86\/revisions"}],"predecessor-version":[{"id":20182,"href":"https:\/\/www.fambach.net\/en\/wp-json\/wp\/v2\/posts\/86\/revisions\/20182"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.fambach.net\/en\/wp-json\/wp\/v2\/media\/5117"}],"wp:attachment":[{"href":"https:\/\/www.fambach.net\/en\/wp-json\/wp\/v2\/media?parent=86"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.fambach.net\/en\/wp-json\/wp\/v2\/categories?post=86"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.fambach.net\/en\/wp-json\/wp\/v2\/tags?post=86"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}