How To Convert Voltage 9Vdc To 3 Vdc

Discussion in 'General Electronics Chat' started by shazureen_86, Aug 27, 2010.

  1. shazureen_86

    Thread Starter New Member

    Aug 26, 2010
    I have a project that I want to convert the voltage 9vdc to 3vdc. Can anybody help me which circuit diagram can I refer and use to drop the voltage.

  2. timrobbins

    Senior Member

    Aug 29, 2009
    Check out the large number of mobile phone and nintendo-type game player car chargers - find one with nominal 3V output - google the switching regulator type - and tweak the circuit to suit.
  3. SgtWookie


    Jul 17, 2007
    You say 9v to 3v, but did not indicate what your current requirements are.

    What is supplying the 9v; a "transistor" battery or a power supply?
  4. marshallf3

    Well-Known Member

    Jul 26, 2010
    More info would definitely be a plus for all of us. If it's a low current requirement and you're not worried about losing some amount of power as wasted simply putting the proper wattage 6V zener diode in series is an easy method. Of course this depends on if the "designed for 9V" circuit will even operate on 3V to begin with.

    -- or -- do you have a circuit that requires 9V but you want to be able to power it with a 3V source? If so, we'll also need the current requirement, then a proper boost supply circuit can be made.