In this DIY project we make a 3-Channel Arduino Relay Shield Circuit for relay based applications. By using this Arduino Relay Shield, we can operate 3 AC appliances at a time.

This article will explore the workings of a relay module and provide a detailed guide on how to interface a single channel relay module with an Arduino.

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Power on the receiver circuit next and wait for five seconds as defined in receiver code. Press pushbutton (S1 or S2) in transmitter circuit to control the corresponding relay in receiver circuit.

Here, we are using a 4 relay module because we will only control four appliances. If you want to automate a different number of appliances, you can use a different relay module. There are many relay ...

The 2-channel relay module is connected with switch S7, this is an “OK / ENTER” switch for the radio. This S7 switch has to press each time we change the station. This 2 channel relay used in this ...

From the circuit diagram of the module, it is clear that, apart from the module only a few external components are needed to build a relay-driver circuit. Yes, there is a chance to realize one simple ...

For that reason, [Hulk] designed a simple relay module in order to cut the amount of time he spends implementing this solution in his various other projects.

Fancy some electronics challenge? Make yourself a DIY smart home with Arduino boards! This is 10x more fun than having someone else do it.