Re: TI-H: Simple IR link
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Re: TI-H: Simple IR link
At 10:46 PM 8/8/98 -0000, you wrote:
>
>Andy Johnson (prjohnson@utahlinx.com) wrote:
>
>>
>>I was thinking of a way to make a simple IR link, using RadioShack parts.
>>Here's what I came up with. Unfortunately, it requires the use of custom
>>software, but that isn't much of a problem.
>>
>>I used a 555 to generate a 40 kHz carrier, controlled by pin 4 on the chip,
>>then ran the output through a transistor into an IR Led. The receiver is
>>just a GP1U52X (RS 276-137). I'm not sure about the electronic
>>characteristics of the linkport, but that shouldn't be a big problem to
>>fix. I've only used one of the calc's wires on each end, allowing one to
>>be used as transmit and the other as receive. If timing is a problem, the
>>driver software can use transitions instead of pulses (1-0 = 0, 0-1 = 1,
>>you get the idea). I expect the speed to be around 1200 bps, and range to
>>be about 10 ft, but lenses and high powered LEDs could fix that.
>
>Have you checked out Sami Khawam's website?
>
>http://unet.univie.ac.at/~a9501901/irlink/e_hard.htm
>
>-Brian
Actually I have, I was trying to make a link that didn't use any mail-order
parts or a microcontroler. The total cost on a link like this would
probably be about $5-$10, less if you did mail-order.
--
Andy Johnson <prjohnson@utahlinx.com>
References: