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This is 0-70V power supply,2A variable using LM723 and 2N3055. We modify from But the “Cheap adjustable 0-30V 2A Laboratory DC Power Supply” project Dc Circuit, Circuit Design, Circuit Diagram, Circuit Board, Simple Electronics, Electronics Basics, Electronics Projects, Basic Electronic Circuits, Electronic Circuit Projects
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0-50V 3A Variable power supply circuit - ElecCircuit.com

Let's build 0-50V Variable power supply circuit, 3A. can adjust output 0V to 50V with overcurrent protection at 3 A. Easy Linear supply.
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