Simple Arduino Traffic Lights

Have you ever made a city out of Legos? I know i have built many of them but they all missed something… Traffic lights!
So i decided to make my very own traffic light setup from my arduino board.

Step 2: Get the components

I assume you already have an adruino board, and maybe also a Protoshield.

You’ll need the LED’s and resistors

the 220 Ohm resistors are color coded so: Red, Red, Brown

Step 3: Hook up to the board

Since this is a really simple project we only need 3 digital pins and ground.

Put the LED’s in the breadboard/protoboard and use the resistors to connect them to the digital pins,

Green to pin 8
Yellow to pin 9
and Red to pin 10

then connect all the negative pins of the LED’s together and to ground.

For more detail: Simple Arduino Traffic Lights