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5v & 12v regulated power supply Power supply circuit diagram dc 30v 3a adjustable laboratory variable 2a current voltage 12v eleccircuit transformer output protection figure transistor 9 ways to build 24v power supply circuits with easy parts
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5V & 12V Regulated Power Supply - Electronics-Lab.com
9 ways to build 24V power supply circuits with easy parts
0-30V Variable Power Supply circuit Diagram at 3A - ElecCircuit.com