Subject:
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Re: RCX IR Transceiver and Sensor Port Circuits
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Newsgroups:
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lugnet.robotics
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Date:
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Tue, 4 Jan 2005 17:50:36 GMT
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Viewed:
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1907 times
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In lugnet.robotics, Stef Mientki wrote:
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Mark Bellis wrote:
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In lugnet.robotics, Stef Mientki wrote:
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sorry my lego pages are mess ,
but does this help ?
http://oase.uci.kun.nl/~mientki/LegoKnex/Legoelectronica/IRtower/IRtower.htm
Stef
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Stef,
Please feel free to include my schematic in your page. Perhaps it fills a
couple of gaps left by those already there.
Mark
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Thanks Mark,
it’s on my page, but as I said it’s mess,
so it’s on a slightly different page:
http://oase.uci.kun.nl/~mientki/LegoKnex/Legoelectronica/IRtower/irtower.html
I’ll hope to rearrange my Lego Website in one of the next months,
but first I’ve to write a decent html editor ;-)
cheers,
Stef
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Here’s the (hopefully) finished circuit diagram for the IR Transceiver, complete
with semiconductor component types and bold lines. I changed the supply rail
voltage to concide with the zener diode voltage.
There’s also a space on the board for an extra capacitor. Perhaps two
capacitors were proposed originally or supply was uncertain.
Stef, please swap the pictures over to put the final version on your page.
I’ll probably draw what I have of the RCX sensor port circuit next. This won’t
be a complete RCX circuit! There would be little point anyway, since so much of
the work is done by the processor.
I recommend the book “More Advanced Robotice with Lego Mindstorms” by Robert
Penfold for those who wish to make their own sensors. It includes an equivalent
circuit of a sensor port as well as general passive and active sensor circuits
and a few homebrew sensors of his own design. Bernard Babani publishing Ltd
December 2000 ISBN 0859349020.
After taking my RCX apart too often I had to solder the battery terminals to the
PCB to get it working reliably again - it used to lose supply, with the
inevitable requirement to download the firmware every time :-(
I found the answer to my earlier transistor question for the RC tower. It is a
high speed (1GHz) BF547 NPN transistor of the usual pin-out, so my suspicions
were correct.
Mark
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Message is in Reply To:
 | | Re: RCX IR Transceiver and Sensor Port Circuits
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| (...) Thanks Mark, it's on my page, but as I said it's mess, so it's on a slightly different page: (URL) hope to rearrange my Lego Website in one of the next months, but first I've to write a decent html editor ;-) cheers, Stef (20 years ago, 31-Dec-04, to lugnet.robotics)
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