piclist 2001\03\12\141329a >
Thread: IR paper detector for a shredder
www.piclist.com/techref/io/irs.htm?key=ir
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face BY : mike@spam_OUTwhitewing.co.uk



On Mon, 12 Mar 2001 10:25:34 -0600, you wrote:

>my shredder jammed and I discovered that the paper detector
>had been mangled and broke from its mount.
>
>This detector seems to be two clear led's fixed in a mount
>pointing down form above the paper slot at about a 45 degree
>angle, like a 'V'
>
>Question is, how does this thing work?  It looks to me like two
>clear led's, how does it detect anything?
One of them is not a LED - it's either a photodiode or phototransistor
in a LED style package.
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