In this DIY project we make a 3-Channel Arduino Relay Shield Circuit for relay based applications.We designed an isolated PCB for 3 relays. By using this Arduino Relay Shield, we can operate 3 AC ...

One of the most useful things you can do with an Arduino is control higher voltage (120-240V) devices like pumps, fans, lights, heaters etc. Since the Arduino operates at 5V it can’t control these ...

Presented here is a simple timer kit built around an Arduino Uno board. It can be used to measure the time delay duration of devices like timer relays, circuit breakers, and other sequential logic ...

We can use this circuit in combination with digital development boards like Arduino for designing circuits where we need to activate the microcontroller by ... SPDT Relay; In4007 diode; BC557 PNP ...

The circuit that operates a simple relay and at the same time checks its correct operation. If there is a fault in the relay, a red indicator light (LED) should light up. The falut might be broken ...