IR Photointerrupter Aperture

Discussion in 'General Electronics Chat' started by gladiator98, May 23, 2010.

  1. gladiator98

    Thread Starter New Member

    May 23, 2010
    I'm using a disc with a hole in it to stop by use of a stepper motor and IR sensor at the location of the hole. So I was trying to figure out what size hole I need to accurately stop the disc. I noticed that IR sensor vendors list "Aperture Sizes" for the LED and Sensors located within the casing ( Are the aperture sizes for the LED and/or Sensors the same size that I want to drill a hole in the disc to accurately stop the disc where I want with this sensor? Thank you.
  2. BMorse

    Senior Member

    Sep 26, 2009
    Yes, and No, the smaller your hole is on the disc the more accurately it will stop where you want it to. Start out with a hole smaller than the aperture hole, and just make it bigger as you "fine tune" it, you can always make the hole bigger, but not smaller

    B. Morse