I had a traffic light that I was refinishing. The only thing left to do was to build the controller for the light’s signal patterns. To give it a twist I incorporated a remote control. This was also the perfect opportunity for me to try out an Arduino. I wanted to use the Arduino becuase it was easy to use on both MAC and Windows.
Step 1: Define the Project
To start an electronics design project first define the parameters of it functionality.
This project is defined as:
Control 3 outputs
Read 4 inputs
Read 1 interupt
Features:
3 outputs are sequenced in multiple modes
-Standard Traffic Light pattern
-Reversed Pattern
-Steady on each output
-Blink each output
-Turn off
Increment and decrement sequence speed
Modify saved timing parameters using remote control
and most important; Execute in a realtime manor.
Step 2: Prototype the circuit
Use prototype methods to test the circuit.
I used the Arduino Duemilanov. I attached 3 LED’s , 4 switches and began to write the code. The Arduino IDE (which is FREE!!) uses a syntax that is very similar to good old fashioned ANSI C. I started with the modes of signal patterns. I used a case statement to modularize my code. I the added the code for the buttons. The buttons control mode UP/DN and speed UP/DN.
Step 3: Write the code
traffic.pde7 KB
Step 4: TEST TEST TEST TEST
Test your circuit and code thoroughly.
The Arduino allows for field program ability, but that is no excuse for not testing.
After adding the remote control I had alot of code changes in order to operate the code.
This version has usable code for the remote’s receiver but it breaks the ability to reprogram the timing and default flash pattern and speed at power up.
Step 5: Electronic Schematic Design
Create each component and connect their pins together
TrafficLightSch.pdf(612×792) 28 KB3 LED’s
For more detail: Arduino Traffic Light Controller with Remote Control
