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12V to 9V 2A step down dc converter using IC 741 and 2N3055
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High Current 12V-13.8V at 30A,25A,20A,15A Power Supply - Elec Circuit
9v dc to 1.5v dc converter circuit diagram
3 step down 12v to 9v converter circuits | ElecCircuit.com
5V, 6V, 9V, 8V, 10V, 12V, 15V, 18V, 24V-1A Regulators using 78xx series