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Switch-Selected Fixed-Voltage Power Supply

2015-03-16 00:44  
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This supply can serve as a battery eliminator for various devices (such as tape recorders, small
Switch-Selected Fixed-Voltage Power Supply

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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