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In lugnet.robotics, Philippe Hurbain wrote:
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For trainheads interested in using this with LDCC: As an experiment, by
temporarily shorting one or two of the diodes (on the 12V path) with a small
piece of wire, you can get a higher track voltage. I felt safe trying this
out because the nominal voltage rating for the RCX H-bridges is 12V (max is
16V), other analog components should be able to handle an extra volt or two,
and the CPU and RAM are supplied by a 5V regulator. Anyways, with the
higher track voltage the locomotives were much zippier, however, I’ve only
tested this for a little while so proceed with caution if you’d like to try
this out yourself.
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Indeed, the input capacitor of the RCX is rated 10V, so I would not do that
for a too long time. This 1000µF capacitor, used to keep memory during
battery exchange, is directly connected to RCX board supply input.
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Thanks for pointing that out, Philo. I think I’ll stick to the non-hopped up
version! :-)
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By the way, this capacitor is also great to zap the input fuse of the RCX (a
1.5A fast blow SMD fuse): if you power the RCX then accidentally make a dead
short across power terminals, it will discharge through the fuse and blow
it...
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Hopefully you didn’t find this out the hard way...
Mark
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Message has 1 Reply:
 | | Re: RCX 2.0 Power Supply
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| (...) A friend did the mistake for me... but I had to repair a few of his RCXs! The connector he used to plug an external supply was prone to be shorted (on RCX side) when he unplugged it. It was only several fuses later that we understood the (...) (20 years ago, 16-Sep-04, to lugnet.robotics, lugnet.trains, FTX)
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Message is in Reply To:
| | Re: RCX 2.0 Power Supply
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| (...) Indeed, the input capacitor of the RCX is rated 10V, so I would not do that for a too long time. This 1000µF capacitor, used to keep memory during battery exchange, is directly connected to RCX board supply input. By the way, this capacitor is (...) (20 years ago, 15-Sep-04, to lugnet.robotics, lugnet.trains, FTX)
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