Subject:
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Re: power source
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Newsgroups:
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lugnet.robotics
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Date:
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Thu, 14 Feb 2002 06:29:27 GMT
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Viewed:
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975 times
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> please note that power from the batteries is not regulated inside the
> rcx! (on the contrary to the power plug of rcx 1.0) if you connect a
Actually, it is regulated (speaking as one who has had to replace the
fuse that comes before the regulator). Think about it. It has to be.
The batteries provide 9V, the MCU requires 5V. If it wasn't regulated,
you'd kill it. There is also a small capacitor (relative to what the
1.0 with external adapter has). If you're RCX ever just plain dies,
it's a good chance it's the fuse (third component in from the +ve
battery terminal). You can test that theory by applying power directly
to the terminals of the electrolytic capacitor immediately to the
right. (this applies to an RCX 2.0 - others are similar)
Matthias Jetleb
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Message is in Reply To:
 | | Re: power source
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| hi! (...) if you use an unregulated supply, you need to add a big capacitator in front of the ic (after rectifing of course)! generally, they advice to use an electrolyt capacitator of sufficient size (there are formulas for this) for filtering and (...) (23 years ago, 13-Feb-02, to lugnet.robotics)
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