In this quick Arduino tutorial I will explain how you can control a relay using the Arduino Board, one 1K and one 10K resistors, 1 BC547 transistor, one 6V or 12V relay, one 1N4007 diode and a 12V fan ...

Planning another Arduino build? If you’re just doing something simple like switching a relay or powering a LED, you might want to think about the Digispark. It’s a very small ATtiny-bas… ...

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.

This Arduino-based Pomodoro timer project also uses this 25-minute cycle. Once you push the button to start the timer, it will run for 25 minutes, display a count-up timer and a "Study time ...

The relay board allows you to connect up to 8 appliances and comes equipped with a 4.3 inch capacitive touchscreen LCD display and will fit standard 40 Pin GPIO connections.