Switch-Selected Fixed-Voltage Power Supply


Posted on Jan 29, 2013

This supply can serve as a battery eliminator for various devices (such as tape recorders, small


Switch-Selected Fixed-Voltage Power Supply
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radios, clocks, etc.). Si selects a resistance that is predetermined to provide a preselected output voltage. In this circuit, various commonly used supply voltages produced by batteries were chosen, but any voltages up to the rating of Tl (approximately) can be produced by choosing an appropriate resistor. Remember to provide adequate heatsinking for Ul.




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