Arduino - Blink multiple LED

This tutorial teaches you how to program an Arduino to make multiple LEDs blink simultaneously without using the delay function. The tutorial provides code in two ways:

We will use three LEDs as examples. You can easily modify it to adapt for two LEDs, four LEDs, or even more.

Hardware Required

1×Arduino UNO or Genuino UNO
1×USB 2.0 cable type A/B
1×LED
1×220 ohm resistor
1×Breadboard
1×Jumper Wires
1×(Optional) 9V Power Adapter for Arduino
1×(Recommended) Screw Terminal Block Shield for Arduino Uno
1×(Optional) Transparent Acrylic Enclosure For Arduino Uno

Or you can buy the following sensor kit:

1×DIYables Sensor Kit 30 types, 69 units
Please note: These are Amazon affiliate links. If you buy the components through these links, We will get a commission at no extra cost to you. We appreciate it.

About LED

We have a detailed LED tutorial including hardware pinout, working principle, Arduino wiring, and code instructions. Learn more here:

Wiring Diagram

Arduino multiple LED Wiring Diagram

This image is created using Fritzing. Click to enlarge image

Video Tutorial

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