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SWITCH_SELECTED_FIXED_VOLTAGE_POWER_SUPPLY

2015-03-20 19:17  
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SWITCH_SELECTED_FIXED_VOLTAGE_POWER_SUPPLY
SWITCH_SELECTED_FIXED_VOLTAGE_POWER_SUPPLY
This supply can serve as a battery eliminator for various devices (such as tape recorders, small radios, clocks, etc.). S1 selects a resistance that is predetermined to provide a preselected output voltage. In this circuit, various conunonly used supply voltages produced by batteries were chosen, but any voltages up to the rating of T1 (approximately) can be produced by choosing an appropriate resistor. The resistor value is given by: Remember to provide adequate heatsinking for U1.