LM317T Variable Voltage Power Supply

by DIshendra in Circuits > Electronics

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LM317T Variable Voltage Power Supply

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After searching on internet for a nice power variable power supply based on LM317T voltage regulator i decided to design one of my own. Because i don't find a good pcb design. All the files are uploaded so you can download them. PCB is designed in Eagle Cad.

Downloads

Power Supply.rar

MAKING THE PCB

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I used toner transfer method. Soldermask is made by painting the pcb with glass paint.

SOLDERING THE COMPONENTS

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Parts list:
10uF, 1uF, 2200uF polarized electrolyte capacitor
220ohms, 1k both 1/4 watt resistors
LM317T Voltage regulator and heatsink
3mm led
1N4007, 1N5406 Diodes
Two pin screw terminal