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  1. dropcheck

    NPN Transistor & welcom

    Hello everyone. New here and I wanted to say Hi first of all. 2ND: Working with zener diode to bias an NPN transistor as a power supply. Believe the transistor is used to increase current to drive circuit. At normal input voltage (30Vdc) everything works fine. At lowever voltages (20Vdc) the...

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