Homemade ultrasonic distance sensor + theory

Best & Fast Prototype ($2 for 10 PCBs): https://www.jlcpcb.com Thanks to JLCPCB for supporting this video. I show you with more details how the ultrasonic distance sensor works. Then, using that theory, we create our own module, we amplify and send a 40KHz pulse, we receive the bounced wave, amplify it and then create the code. I hope that you will learn something new with this project. Help my projects on Patreon: https://www.patreon.com/ELECTRONOOBS my Q&A page: http://electronoobs.com/eng_preguntas.php Canal en Español: https://www.youtube.com/channel/UCL_QvUUeriC6q610RCXDlSQ -------------------------------------------------------------------- LINKS ________________________________________________________ Tutorial website: http://www.electronoobs.com/eng_arduino_tut36.php Part list: http://www.electronoobs.com/eng_arduino_tut36_parts1.php Schematic: http://www.electronoobs.com/eng_arduino_tut36_sch1.php Code: http://www.electronoobs.com/eng_arduino_tut36_code1.php LCD test code for second Arduino: http://www.electronoobs.com/eng_arduino_tut36_code2.php EXTRA SR04 schematic: https://lh3.googleusercontent.com/-mnA_RLbTvwQ/VgwHygp8_dI/AAAAAAAAaWU/d4UUzjQMTY0/w1086-h815/HC-SR04-sch.jpg Oscilloscope view: http://www.electronoobs.com/images/Arduino/tut_36/homemade_ultrasonic_distance_sensor.gif COUPONS for you ________________________________________________________ Ultimate mobile sale: https://www.gearbest.com/promotion-eu-mobile-phones-sales-special-1126.html?04&lkid=13542191 3D RepRap festival: https://www.gearbest.com/promotion-reprap3dfestival-special-2214.html?0&lkid=13542196 Programmable soldering iron: https://www.gearbest.com/boards-shields/pp_266258.html?lkid=13542238 Coupon: "GBMAR069" DIGITAL MULTIMETER (9.9$): https://www.gearbest.com/multimeters-fitting/pp_650318.html Coupon: "ZT102SALE" PRINTERS ------------------------------------- Ender 3(167€): https://www.gearbest.com/3d-printers-3d-printer-kits/pp_1845899.html?wid=1433363&lkid=15361952 SparkMaker SLA: https://www.gearbest.com/3d-printers-3d-printer-kits/pp_009472956105.html?wid=1433363&lkid=14610954 Crealitu CR10: https://www.gearbest.com/3d-printers-3d-printer-kits/pp_441282.html?lkid=11382974 Coupon code: "11CR10EU" or "11CR10US" ANET E10 (219$): https://www.gearbest.com/3d-printers-3d-printer-kits/pp_664899.html?wid=44&lkid=13867473 Coupon code: "Anete10us" TEVO Tarantula (175$): https://www.gearbest.com/3d-printers-3d-printer-kits/pp_628789.html?wid=44&lkid=13867477 Coupon code: "Tarantulaus" Creality CR10 MINI: https://www.gearbest.com/3d-printers-3d-printer-kits/pp_778274.html?lkid=11814180 COUPON: CR10MINI Anet A8: https://www.gearbest.com/3d-printers-3d-printer-kits/pp_337314.html?lkid=13060560 Coupon code: "A8KIDA" Like share and subscribe to motivate me. Thank you