I am building a 4-channel touchless switchboard. Arduino Uno, as the heart of the project, surrounded by four ultrasonic sound sensors, offers a simple, low-cost, and novel solution. The switches can ...

Note: This example requires firmware 1.0282 (T7) or 1.0023 (T4) print("Set a DIO based on voltage. Digital I/O is FIO3 (FIO5 on T4), voltage measured on AIN1. Update ...