The LED Traffic Lights Signal Module / Digital Signal Output Traffic Light Module is another great interesting DIY accessory by Robu.in. This is a mini-traffic light display module, high brightness, very suitable for the production of a traffic light system model.
Can be connected to the motherboard’s PWM pin to control the brightness of the light.
 
Product Description:
PCB Size: 60 x 20 x 13.5 (LxWxH)mm.
Color: red, yellow, green
LED Size: 10mm x 7.
Brightness: Normal brightness.
Voltage: 5V.
Interface: common cathode red yellow green control.