Subject:
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Re: Low battery detection
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Newsgroups:
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lugnet.robotics.handyboard
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Date:
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Wed, 29 Oct 1997 02:13:32 GMT
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Original-From:
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Brian Lavery <(blavery@)spamcake(acslink.aone.net.au)>
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Viewed:
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1347 times
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> Is it possible for a handy-board program (either 'C' or assembler) to
> detect a low battery condition?
Sure:
Solder a wire to the "BATTERY +", add 2 resistors to make a voltage divider
(to divide the battery ABSOLUTE MAX condition, say about 12V, down to about
4 volts for the analog 0-5v range), and feed it into an ANALOG input point.
Put a multimeter on the battery to measure its volts in a LOW charge
condition, and then in a HIGH charge condition. Read the HB analog input
value for both those conditions, and assume a linear connection between bat
volts and analog reading.
Pity it wasn't built in!
Brian Lavery
blavery@computer.org
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