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    Help needed, 3v to 12v circut

    that is sorta the circut, there is bits missing im sure, basicaly i need it to latch when 3v is applied, then unlatch by a button also i need it to stay latched if 12v is disconnected, or stay unlatched (memory sorta thing) any help is much appreciated -Jake
  2. H

    Help needed, 3v to 12v circut

    Hey, im having trouble with a circut im trying to build. basicaly i have an unstable voltage of 1.5v-3.1v that i need to switch a 12v relay and the relay needs to stay switched when the volts are removed, untill another switch is pressed (momentary switch). i built a circut using a transistor, a...
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