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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.
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...
Philo
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Message has 1 Reply:
Message is in Reply To:
 | | RCX 2.0 Power Supply
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| I've crossposted to .trains because this will be useful for those wanting to run LDCC with an RCX 2. Hi All, I've posted some photos on Brickshelf of an external power supply for the RCX 2. The nice part about the design is that program memory is (...) (20 years ago, 15-Sep-04, to lugnet.robotics, lugnet.trains, FTX)
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