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Variable Voltage, Variable Current Power Supply


Features:
Regulated Adjustable Voltage out 2-30VDC
High Current Output 5A (based on transformer selection).
Adjustable Current Limit
Can be used as a variable current supply.
Based on LM317 Voltage Regulator.
Built in protection diodes
Speed controlled fan connection (based on current draw).
Current meter connection (0.1V/1A).



Circuit Diagram
Variable Voltage, Variable Current Power Supply Circuit


Circuit Board Layout

Features universal capcitor mounting/spacing to allow various capacitors to fit.  Mounting pattern that fits TO-200 or TO-218/247 for pass transistor and transistor used for current limit circuit.  Fan connection uses connection compatible with standard PC fan connection; allowing use of PC heatsink fan combination.


Variable Voltage, Variable Current Power Supply     Variable Voltage, Variable Current Power Supply



For a correct size PDF of the PCB bottom copper (viewed from the top) click here.



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