Posted in Arduino Hacks, Lifehacks Tagged arduino, arduino nano, distance sensor, garage, leds, oled, parking, rotary encoder, ultrasonic sensor Contactless Doorbell Built To Avoid Coronavirus ...

This ultrasonic radar project is from [mircemk] who uses a small ultrasonic distance sensor attached to a rotating platform. A motor rotates it around a 180-degree field-of-view and an Arduino ...