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 1: You Will Need:
You will need:
An arduino board
Red, Green and amber LED's
Three 220 Ohm Resistors
and an Protoshield
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.
Step 4: Upload the Code!
Again, since this is a really simple project the code is also simple,
just copy it from below and upload it to your board via USB.
int greenled = 8; //Led's and pins
int yellowled = 9;
int redled = 10;
pinMode(greenled, OUTPUT); //Pinmodes of the leds
digitalWrite(greenled, HIGH); //Green on for 5 seconds
digitalWrite(greenled, LOW); //Green off, yellow on for 2 seconds
digitalWrite(yellowled, LOW); //yellow off, red on for 5 seconds
digitalWrite(yellowled, HIGH); //Yellow and red on for 2 seconds
digitalWrite(redled, LOW); //Red and Yellow off
Step 5: Watch Your Traffic Being Controlled :)
the lights change according to European standards.