The Arduino blink LED circuit is a simple circuit that works great for starting to learn Arduino. Both the code and the connections are straightforward so that you can understand it with little to no background.
In this quickstart guide, you’ll learn how to connect an LED to an Arduino board and make it blink.
Parts Needed
- Arduino Uno
- Breadboard (and some breadboard wires)
- Light-Emitting Diode (LED) (Most LEDs will work)
- Resistor (220 Ω)
Arduino Blink LED Circuit
To connect an LED to an Arduino, you need a resistor in series with the LED. This is to limit how much current the LED pulls out of the Arduino pin. The value isn’t crucial but should be between 220 Ω and 1000 Ω.