The 4 channel smart relay board is powered by a ESP32 WROOM providing the ability to safely control up to four appliances or devices on a load of 110-250 VAC/7A, 30 VDC/10A depending on your needs.

The key hardware in this firecracker/rocket igniter setup is the Arduino Uno microcontroller development board, although most other Arduino boards will work fine here. Advertisement. ... This is a low ...

Raspberry Pi 4. Arduino Uno. 4-channel relay module. PIR motion sensor. Steps: Use Arduino to handle sensor input and relay control. Pi runs a Python Flask server with a simple UI to toggle GPIO pins ...