Part 3 of 15
LED (little light)
A small light in 5 colors
In your kit: 10×🔎 What is it?
An LED is a small light that uses very little power. Your kit has 10 LEDs in 5 colors. An LED only works one way, so you must put it in the right way around.
🔌 This is how you connect it
- The long leg is the plus (+). It goes through a 220 Ω resistor to a pin on your Arduino.
- The short leg is the minus (−). It goes to GND. On that side, the edge of the light is also flat.
Always use a resistor! Without a resistor, the LED gets too much current and breaks.
Wiring diagram
| From | To |
|---|---|
Arduino UNO · D13 |
Resistor 220 Ω · 1 |
Resistor 220 Ω · 2 |
LED (little light) · ANODE |
LED (little light) · CATHODE |
Arduino UNO · GND |
✨ What can you do with it?
- A blinking light
- A traffic light
- A light that shows if something is on or off
💡 Tip
Does your LED do nothing? Turn it around. It only works one way.
Projects with this part
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