Photo strobe and optoisolator

Discussion in 'The Projects Forum' started by rt82609, Nov 11, 2011.

  1. rt82609

    Thread Starter New Member

    Nov 11, 2011
    I am attempting to trigger a strobe, ultimately using an Arduino. I am using a 4n26 optoisolator to keep from frying my board. To test how things might work, I have attached the input of the opto to a battery pack and the strobe to the output. When I power on the strobe, the optoisolator closes the circuit, regardless of what I have on the input. I checked my understanding by measuring the output and finding that the opto's "switch" closes as I expected.

    Can someone nudge me into a direction that might help me get over this hump?
  2. hgmjr


    Jan 28, 2005
    Can you post a diagram of your hookup? We can better assist you if you do.