5V from RS232 ?

Discussion in 'General Electronics Chat' started by jkj123, Jan 13, 2009.

  1. jkj123

    Thread Starter Member

    Nov 5, 2008
    22
    0
    Can sombody help me to get 5V from RS232.I have circuit for that but current is too low around 10mA.That is from DTR and RTS of rs232.if you have any other solutions for higher current rating pls share it.jaison
     
  2. leftyretro

    Active Member

    Nov 25, 2008
    394
    2
    How much current are you looking for? The amount will always be limited because it is coming from driver pins designed to be signal sources not power sources.

    Lefty
     
  3. jkj123

    Thread Starter Member

    Nov 5, 2008
    22
    0
    My requirement is to operate one IR LED and a Photodiode. But i dont think the current of 10mA from RS232 port is sufficient for that.Any idea about that?
     
  4. leftyretro

    Active Member

    Nov 25, 2008
    394
    2
    Most of the newer LEDs put out plenty of light at less then 10ma. Try one at say 3ma and see if your photodiode gets enough light to function.


    Lefty
     
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