What is it?

This module is your typical relay board with a twist. It is a relay breakout board with an integrated current sensor. It features a relay which you can use to control electrical devices like lamps. It has a current sensor that is directly connected to the relay, so you can measure the energy consumption of the device that is connected to the relay without any external components. It also has an onboard LED so you can see what is the current state of the relay.

The relay can support up to 5A at a maximum voltage of 250V AC. The current sensor is an ACS712 sensor that can read up to 5A with a sensitivity of 185 mV/A. The board uses 5V logic for both the relay and the sensor, so it can easily be controlled from an Arduino board.

Why did you make it?

I made this module for home automation projects that involved controlling lamps from Arduino. I was frustrated by having to use an additional board & cables to measure the energy consumption of the lamp I was connecting to the relay. With this board, you can control your device & measure its energy consumption at the same time, without involving any other boards or cables.

What makes it special?

Compared to other relay boards, this board comes with an integrated current sensor. This unique feature will avoid you to use external boards and cables to measure the energy consumption of the device connected to the relay.