LM317T Voltage Regulator with Pass Transistor

Power supply noise elimination. We made this simple voltage regulator and filter to eliminate hum and noise from an universal power supply - a cheap 10 eur adapter (specs: 12V 1A DC) The input is 12V DC and you get 3 parallel 9V outputs and one 18V output. It's not isolated, but it's a quick and cheap solution...



http://www.youtube.com/watch?v=5txHq2w5jFo&hl=en