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  1. Martin33

    Transistor switch to switch negative voltage?

    Hi, Can I use a transistor switch to switch between 5V(Switch off) and -12V(On)? I am using outputs from a demultiplexer to drive the base of the transistor through a base resistor. I have -12V on the emitter and 5V on the collector(through a pull-up resistor). I have tested this on a bench and...

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