NNTP-Posting-Date: Thu, 19 Dec 2002 14:41:40 -0600
From: "Arthur Jernberg"
Subject: Re: Infrared led tester
Date: Thu, 19 Dec 2002 15:41:42 -0500
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2SB564, 2 leds, 220 Ohm resistor, and a used IR Pickup from a vcr. Works
absolutely great. No it won't decode the data pulses and send specific data
to a micro but that is not it's intention. Just a simple circuit designed to
indicate if a IR signal is being produces by an ir source, be it a ir led,
or fluorescent light. Specifically built it to check if remotes were indeed
functional or not. Have used it to test other sources of ir, inclusive of
those mentioned. Cheers.
"Spehro Pefhany" wrote in message
> On Thu, 19 Dec 2002 15:32:32 -0500, the renowned "Arthur Jernberg"
> >I built a simple circuit using a 9V battery, couple of transistors, and
> >ir pickup out of an old vcr. Put a couple of leds in the circuit to
> >activity. Works great checking remotes and any other source if ir.
> Most current appliances use modules that contain ~40kHz demodulation
> circuitry; I don't think you'd see any activity unless the IR was from
> a similarly modulated remote. I've got a bunch of samples of ones that
> are molded into a plastic case not much bigger than an LED, with a
> little shield around them. They cannot be disassembled in the
> conventional sense.
> Best regards,
> Spehro Pefhany
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