Arduino Variable Cycle Traffic Lights w/Push Button Walk Light Signal

Pretty much what the title says - traffic signals that you can adjust the cycle rate via POT & request a walk signal via a push button.

This project is fairly easy to assemble - most effort went into scripting rather than laying out the prototype.

Features

Variable Light Cycle: Using the pot you can adjust the frequency of how fast the lights change
Short Cycle Yellow: Code is also included to adjust the yellow cycle independently of the Red & Green (as a % of cycle rate)
Push Button Walk Request: Default operation is for the the Wait Signal to remain lit during a green light. Pressing the push button at any point will trigger a walk light on the NEXT green signal.
Flashing Wait on Green: The system will also start to flash the wait light part way through the green. Code is provided to adjust how long it waits (as a % of cycle rate)

Parts

5 LEDs (1 each of Red, Yellow, Green, Organge & White)
One basic, normally open, switch
One potentiometer
One 10K Resistor
An Arduino board (I used the UNO)

(The POT is optional if you choose to fix the light cycle rate)

Instructions

Pretty simple - attach the components as indicated in the Fritzing diagrams & load the code up in Arduino. I've commented all of the code so it should be pretty self-explanatory once you're in it to see where to adjust what.