12 v adapter ,shut off suppply

Discussion in 'General Electronics Chat' started by getzme4u, Aug 14, 2011.

  1. getzme4u

    Thread Starter New Member

    Aug 12, 2011
    hello sir
    i m using 12 v 1 amp adapter and through bc547 i will get signal then i want to stop my adapter supply going toward my microcontroler kit and this bc 547 alsothen how i can do this.
    but this bc547 is getting current by battery also then it is no problem but shud not have current from adapter only

    please helpme
  2. praondevou

    AAC Fanatic!

    Jul 9, 2011
    ??? Your question is not clear. Post it as a sequence, e.g.

    1. Power supply is on
    2. You get a signal from somewhere
    3. Microcontroller goes on idle or it's power supply is interrupted
    4. ....

    You want to turn off (interrupt it's power supply) the MCU with an external signal. Where does it come from, what is the signals voltage level? Post a SCHEMATIC.