Re: TI-H: IR Led problems
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Re: TI-H: IR Led problems
Ok...here's the basic circuit i was workin with...
For some reason the detector (which liiks like a clear transistor) has 3
pins. I can understand why a real transisitor would need 3, but why would
this? The third pin should have been replaced the IR sensitive part.
Tell me if you see anything wrong with this...
-- Jon Olson
-----Original Message-----
From: Grant Stockly <gussie@alaska.net>
To: ti-hardware@lists.ticalc.org <ti-hardware@lists.ticalc.org>
Date: Tuesday, April 28, 1998 10:42 PM
Subject: Re: TI-H: IR Led problems
>
>Have you tried checking the schemaitc?
>
>>I hapened to be near Radio $hack today, so i decided i'd walk in and see
>>what overpriced junk i could buy today...for $2.00 i found an IR
>>LED/Detector pair. I thought "Oh, cool...i can buy one of these and see if
i
>>can get a simple IR circuit working. So, i take em home, and start using
my
>>trusty alligator clips to hook em up. Unfortunately, i've run into a bit
of
>>a problem. No matter how i hook up the detector, i either always get
current
>>passing through, or i never get current passing through. It never seems to
>>be "Only when i'm shining my little IR Led on you that i get light. I'm
>>thinking it's probably the detector that's dead, but i can't be sure. I'm
>>slightly angered by this :>
>>
>>- Jon Olson
>>
>>--
>>"Nobody will ever need more than 640k RAM!" -- Bill Gates, 1981
>>"Windows 95 needs at least 8 MB RAM." -- Bill Gates, 1996
>>"Nobody will ever need Windows 95." -- logical conclusion
>
schem.JPG
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