Variable Power Supply

Schematic Diagram

The variable power supply runs on battery or mains and uses an LM317 to regulate the output. A variable resistor adjusts
the output voltage between 1.2 volts and 10 volts.

Internal View

The circuit board carries the LM317 regulator with clip-on heat sink.

Front Panel

The front panel carries the indicator LED, voltage control, and output terminals.

Rear View

The rear panel carries two battery boxes, battery on/off switch and the mains adaptor connector.

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