LM317T Voltage Regulator with Pass Transistor

This is the latest 3rd version of ZAPTOR Gold Acoustic Voltage Stabiliser...it equipped with an intelligent LED which will change colour based on your car's voltage usage...the more voltage is used...the colour on the LED change and blink faster...



http://www.youtube.com/watch?v=8Tq1gw0nFUA&hl=en