Fixed Voltage Power Supply

The fixed voltage power supply is useful in applications where an adjustable output is not required. This supply is simple, but very flexable as the voltage it outputs is dependant only on the regulator and transformer you choose. The maximum output current is 1.5A.

Schematic

Parts

Part Total Qty. Description Substitutions C1 1 2200uF 35V Electrolytic Capacitor C2, C4 2 0.1uF Ceramic Disc Capacitor C3 1 10uF 35V Electrolytic Capacitor D1, D2 2 1N4007 Silicon Diode BR1 1 2A 30V Bridge Rectifier U1 1 Regulator (See Notes) T1 1 Transformer (See Notes) S1 1 SPST 2 Amp Switch F1 1 2A 250V Fuse and Holder MISC 1 Heatsink For U1, Line Cord, Case, Wire

Notes

1. Since this project operates from 120 (or 220, or 240, etc.) volts AC, it MUST be built inside a case.
2. U1 will reauire a heatsink.
3. You will need to choose T1 and U1 to match the voltage you want. Use the table below as a reference.
   

   Output Voltage	T1	U1
   5V	6V, 1.5A	7805
   6V	6V, 1.5A	7806
   9V	12V, 1.5A	7809
   12V	12V, 1.5A	7812
   15V	24V, 1.5A	7815
   18V	24V, 1.5A	7818