Re: TI-H: IR Led problems

To: ti-hardware@lists.ticalc.org
Subject: Re: TI-H: IR Led problems
From: Richard Piotter <richfile@prairie.lakes.com>
Date: Tue, 28 Apr 1998 22:28:15 +0100
Delivered-To: ti-hardware-outgoing@towerguard.unix.edu.sollentuna.se
References: <003c01bd7315$e1b53aa0$1e8066ce@jonsolson>
Reply-To: ti-hardware@lists.ticalc.org


Jon Olson wrote:
> 
> 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 :>

Same here! I was buiding an IR detector to turn a flashing crossing signal on
and off on my model Railroad, but i NEVER got it to work!!! They show the
phototransistor with anode and cathode, but it says transistor, so I probably
burned it out! Of course, they have a third pin, but it is a dummy pin, so
it's not as simple as flipping it!

Rat Shaq SUCKS!!!
-- 


Richard Piotter
richfile@prairie.lakes.com

The Richfiles TI Hardware and BASIC web page:
http://www.geocities.com/SiliconValley/Lakes/5081/Richfiles.html

References:

TI-H: IR Led problems

From: "Jon Olson" <morph@jmss.com>