IR Photointerrupter Aperture

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gladiator98

Joined May 23, 2010
1
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 (http://media.digikey.com/pdf/Data%20...B%20Series.pdf). 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.
 

BMorse

Joined Sep 26, 2009
2,675
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
 
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