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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


This is the schematic of the Fixed Voltage Polarity Power Supply

Parts


Part
Total Qty.
Description
Substitutions
C112200uF 35V Electrolytic Capacitor
C2, C420.1uF Ceramic Disc Capacitor
C3110uF 35V Electrolytic Capacitor
D1, D221N4007 Silicon Diode
BR112A 30V Bridge Rectifier
U11Regulator (See Notes)
T11Transformer (See Notes)
S11SPST 2 Amp Switch
F112A 250V Fuse and Holder
MISC1Heatsink 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
5V6V, 1.5A7805
6V6V, 1.5A7806
9V12V, 1.5A7809
12V12V, 1.5A7812
15V24V, 1.5A7815
18V24V, 1.5A7818

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