10v sync pulse from 5v supply

Discussion in 'General Electronics Chat' started by chumpney17, Mar 24, 2010.

  1. chumpney17

    Thread Starter New Member

    Jul 11, 2008
    I am trying to amplify a 5v sync pulse from an AVR to one of 10v. The circuit has a 5v supply. I am new to hardware but have run across discussions of charge-pump circuits but I want to make sure I am going down the right track. The 5v sync pulse is variable between 30-120hz. I know that I could do this using a 10v supply and a NPN transistor but I would like to avoid having 2 power supplies on the circuit. Any help would be appreciated.
  2. mik3

    Senior Member

    Feb 4, 2008
    You can make a simple boost converter controlled by the AVR as to make the 5V to 10V. Use a transistor to generate the sync pulse from the 10V voltage. Another solution is to use a 10V power supply and use a 5V voltage regulator to power the AVR.
  3. retched

    AAC Fanatic!

    Dec 5, 2009
    What is the current requirement of the 10v pulse?
  4. chumpney17

    Thread Starter New Member

    Jul 11, 2008
    This circuit will be used to trigger the shutter on a video camera and this should have very little load. The datasheet of the camera says the trigger fires on a rising edge between 8-14V. I can't find the specific current requirement for the trigger pin but I believe it is between 1-7mA.