Simple Load Switching for Arduino, ESP32, and Automation Builds

The Relay Shield for Arduino is a practical relay module from Circuitrocks for students, makers, and repair-friendly builds. It fits well in projects that need switching external loads, while keeping setup straightforward for testing and prototype work.

Compared with generic parts, this product stands out through details such as relay module. That makes it a solid choice for Arduino, ESP32, Raspberry Pi, robotics, motion-control, and workshop projects where matching the right part from the start saves time.

Important: Always match the electrical rating, size, and control method of this part with the rest of your setup before full-power testing.

Why you'll love it

Simple load switching: adds useful value when choosing parts for a build
Controller-friendly trigger input: adds useful value when choosing parts for a build
Useful in automation projects: adds useful value when choosing parts for a build
Easy to add to timed or sensor-based control: adds useful value when choosing parts for a build

What you can build

This product is a good fit for home automation, pumps, lights, fans, and controller-triggered switching tasks. It works especially well in student projects, quick repairs, and prototype builds where part availability, straightforward hookup, and predictable results matter.

Starter bundles

Most users pair this with Arduino, ESP32, or Raspberry Pi, along with jumper wires and a proper power source for the target load or sensor.

Recommended add-ons

Useful add-ons include terminal blocks, controller boards, and safe power wiring for your switched load. You can also compare it with DFRobot Relay Module V3.1 - Arduino-Compatible 5V Relay, Relay Grove.

Comparison table

Compared Product	Best For	Key Difference	Direct Link
DFRobot Relay Module V3.1 - Arduino-Compatible 5V Relay	switching external loads	5V, ble	View product
Relay Grove	switching external loads	Relay Grove	View product
IR Infrared Remote Control Relay 8 Channel Module for Arduino	switching external loads	Infrared Remote Control Relay	View product

Technical specifications

Product	Relay Shield for Arduino
Brand	Circuitrocks
Product Type	Relay Module
Primary SKU	AB354
Product URL	https://circuit.rocks/products/relay-shield

Pinout & power notes

The low-voltage control side connects to your controller, while the load side uses COM, NO, and NC terminals. Keep the switched load wiring separate from the signal side.

What’s in the box

1 × Relay Shield for Arduino

Frequently Asked Questions

Can this work with Arduino or similar boards? Yes, as long as the voltage, control method, and wiring match your controller and power supply.

Should I power it directly from a controller pin? For small signal-only modules that may be fine, but motors, pumps, solenoids, and relays should use a proper driver or external supply.

Is this good for student and prototype builds? Yes. It fits well in testing, learning, and proof-of-concept projects when matched with the right support parts.

What do COM, NO, and NC mean? They are the switched load terminals. COM is common, NO is normally open, and NC is normally closed.