photoamp

Discussion in 'The Projects Forum' started by burtS, Feb 26, 2011.

  1. burtS

    Thread Starter Member

    Mar 6, 2008
    29
    0
    Am off/out of town for 2 weeks will check it upon return. Phototransistor an unmarked ebay item but they work. Output of phototransistor alone (at about 14 v as I recall) insufficient to activate the interface input, hence the transistor in the circuit.Will measure current in the input line upon return. Acces provides the attached input circuit.
    thanks,
    Burt
     
  2. wayneh

    Expert

    Sep 9, 2010
    12,153
    3,059
    Perhaps when you return you can tell us why you posted this. Do you have a question?
     
  3. burtS

    Thread Starter Member

    Mar 6, 2008
    29
    0
    Sorry, it was in response to on-going dialog, must have hit the wrong button.