[Rockwell] sent us an update on his traffic light hacking ... an AVR running the Arduino bootloader, a crystal and filtering caps, and an Arduino serial to USB module for connectivity.

Here is a traffic light system based on Arduino that can be used in a 3-way ond 4-way intersections. It has an additional blinking orange led that is used to signal when the pedestrians can cross the ...

Now let’s move to a funny do it yourself project (good for a novice) using the Funduino Joystick Shield, an Arduino Uno, and one RYG Traffic Light LED Module. You can use an RGB LED module (of course ...

and [Bertus Kruger] has created a neat way to make lights blink wirelessly. He has a footprint in the middle of the board for soldering the castellated ESP8266 module, and an LED ring around it ...