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Video Switcher

Discussion in 'General Electronics Discussion' started by georgelawshe, Feb 18, 2012.

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  1. georgelawshe

    georgelawshe

    2
    0
    Feb 18, 2012
    I have two Video Inputs to a single output. I would like a swicher that would constantly switch between the two inputs with adjustable preset "ON" times.
    Camera A would be on for 3 minutes then Camera B would be on for 5 Minutes then loop again.

    I would like the adjustable times to be from 2 to 8 minutes.

    Any ideas? Your help will be appreciated.

    Thanks
    GeorgeLawshe
     
  2. twister

    twister

    172
    7
    Feb 12, 2012
    I think a 556 set up as two monostable circuits would work. The outputs could control a relay or transistor to turn on and off your cameras. You would feed back the outputs to the trigger or the opposite timer. I don't know how to draw schematics on the computer but maybe someone else could draw it for you. You would need two variable pots for R1.
     
    Last edited by a moderator: Jun 5, 2013
  3. georgelawshe

    georgelawshe

    2
    0
    Feb 18, 2012
    This is my problem, I can build the circuit with no problem, my problem is designing the circuit, Can anyone help with this?

    Thanks
    GeorgeLawshe
     
  4. twister

    twister

    172
    7
    Feb 12, 2012
    Sorry that my first link didn't work.
    http://www.kpsec.freeuk.com/555timer.htm
    Maybe if you study the 555 circuits you can figure out how to make a circuit work for you. If you go to an electronic supplier you can get a breadboard that will allow you to plug in components to test out your theorys. It is always best to breadboard a new circuit to see if it will work. I buy a lot of stuff from Jameco.com and they seem to have good prices.
     
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