Arduino project · Buttons and switches · Beginner
IR Remote LED Control
Press 1, 2 or 3 on the remote to light the matching LED. Let go and it switches off.
What you will learn
- How a TV-style remote talks with infrared light
- How each key has its own code
- How to read codes with the IRremote library
How it works
The receiver gives the Arduino a code when it sees the remote blink. The helper function turns the code into a key number. Each step turns on the LED that matches the key.
Try this next
- Use the remote to latch LEDs on and off.
- Add a 4th LED for key 4.
- Print the code of any key with Serial Monitor.
The simulator program and explanation on this page are original. The idea follows a classic Arduino project that students have built for years.
Parts: sensors and actuators (tap to show or hide)
Try the inputs (virtual sensors)
Pins (you can change them)
| Part | Arduino pin (change it here) | How to wire it |
|---|
Every wire, one by one
Red rail = 5 V from the Arduino 5V pin. Black rail = GND. The coloured wires carry signals. Match the wire colours on the drawing to this list.
| # | Colour | From (part and leg) | To |
|---|
Steps run from top to bottom, then start again. While the simulation runs, the active step is highlighted in green.
Quantities come from the parts you added. The store links open a search for that item on Robu.in, Amazon.in and ThinkRobotics, so you always see what is in stock today. Check the model, voltage and price before you order.
| # | Item | Qty | Search term | Buy / compare |
|---|
The PDF has the circuit sketch, pin table, every wire, sequence, full code, the parts list with store links, do’s and don’ts for each part, and the safety notes. The project file lets you come back and keep editing.
In the real world
Remote-controlled lamps
Press a key or a remote button. The matching lamp in the real room switches on or off.
Tip: use the gold tab at the bottom of the circuit drawing to pull the real-world view up over the Arduino board. Your parts stay visible above it, so you can press a button and watch the real scene react.
- Keypad / IR remote / phone = the controller
- LEDs = the lamps