Grove Infrared Receiver Module

Quick Answer: The Grove Infrared Receiver Module is a Grove board with an infrared receiver that detects remote-control signals and turns them into clean digital pulses for a microcontroller to decode. With a Grove infrared receiver, a project can be controlled from an ordinary TV remote or from a matching infrared emitter.

Filtering a Signal Out of Background Light

Rooms are full of infrared: sunlight, lamps and warm objects all emit it. The receiver on this module picks out remote-control signals by responding only to infrared that flashes at its tuned carrier frequency. An internal demodulator strips off the carrier and outputs the bursts as a pattern of HIGH and LOW pulses, which is what the microcontroller reads.

A decoding library measures the pulse lengths and matches them to a protocol, returning a code for each key pressed. The first lesson is usually to print those codes: students press each button on a spare TV remote and build a table of values. The program can then act on them, turning a remote into a controller for a robot, a light or a slideshow.

Looking at the raw pulse timings shows how a protocol is built: a long start pulse, then bits encoded by the length of the gaps. The Grove Infrared Emitter completes the link for two-way projects. The carrier frequency the receiver is tuned to should be confirmed if you plan to use a specific remote.

Applications

• Controlling robots, lights or displays with a spare TV remote
• Decoding and tabulating remote-control codes to study how protocols work
• Two-way infrared links between projects, with an emitter on the other side
• Coded-signal demonstrations in which a device disarms only when it receives the right code

Specifications

Care & Handling

• Keep the receiver window of the Grove Infrared Receiver Module clean and unobstructed.
• Shield the module from direct sunlight and bright lamps, which reduce its sensitivity.
• Handle it by the edges and keep it away from damp.
• Keep a labelled table of the remote codes each class uses, so projects can be restored quickly next lesson.

Why Choose LabEquip

Remote-control projects appeal to students because they can use hardware they already have at home. LabEquip lists the infrared receiver in its Stem Kits range alongside the emitter; send paired quantities through the LabEquip contact page.

Frequently Asked Questions

Will it work with any TV remote?

Most infrared remotes use a carrier near the frequency common receivers are tuned to, and decoding libraries recognise many protocols. A few remotes use unusual frequencies or protocols and may not decode reliably, so test with the remotes you have.

Why do I get random codes with no button pressed?

Strong sunlight, fluorescent lamps or a nearby infrared source can create stray pulses. Move the receiver away from the light, shade it, and ignore codes that do not match your table.

What does the demodulator do?

It removes the rapid carrier flashing and outputs only the on-off bursts that carry the data. That turns a fast optical signal into slower pulses a microcontroller can time easily.

How do I find the code for each remote button?

Run a sketch that prints each received code to the serial monitor, press every button in turn and record the values in a table. The main program then compares incoming codes with that table.

Can the receiver detect body heat or motion?

No. It is tuned to modulated signals from emitters and ignores steady infrared from warm bodies. Detecting people needs a PIR motion sensor, which works on a different principle.

How far away can the remote be?

Typically across a classroom with the remote pointed at the receiver. Range drops with angle, weak remote batteries and bright ambient light.

Last Updated: September 2026