Homemade ultrasonic distance sensor + theory

Best & Fast Prototype ($2 for 10 PCBs): 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: my Q&A page: