Subject:
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Re: Sonar question
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Newsgroups:
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lugnet.robotics.handyboard
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Date:
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Thu, 3 Dec 1998 22:42:50 GMT
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Original-From:
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Tom Brusehaver <tgb@cozy#saynotospam#.wamnet.com>
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Reply-To:
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tgb@wamnet/NoMoreSpam/.com
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Viewed:
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2477 times
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> The Polaroid Sonar board requires a supply voltage less than 7 volts.
> The battery of the handy board is around 12, so you'll probably shorten
> the life of your sonar board considerably if you connect it straight in
> (i.e. burn it up :.)). The diodes are just a cheap way to reduce the
> supply voltage to a safe voltage. Any 6 volt source will due so long as
> you maintain a common ground with the handyboard battery supply. The
> 4.5 volts you measured is a little strange though, with the 6 diodes
> specified you should be reading about 6 volts.
The battery for the handy board is a 9.6V cell (8 * 1.2V cells in
series.)
A normal 1n400X diode will drop 0.7V each. (6 * 0.7 = 4.2)
9.6 - 4.2 = 5.4V
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Message has 1 Reply:
 | | motor questions using motor(x,y)
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| Hi all, The motor(x,y) function in the lib_hb.c file works as expected (the motor speed does vary depending on value given and the correct motor goes on), but when I actually have a motor in the header both LEDs go on! (and I get corresponding (...) (26 years ago, 3-Dec-98, to lugnet.robotics.handyboard)
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Message is in Reply To:
| | Re: Sonar question
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| The Polaroid Sonar board requires a supply voltage less than 7 volts. The battery of the handy board is around 12, so you'll probably shorten the life of your sonar board considerably if you connect it straight in (i.e. burn it up :.)). The diodes (...) (26 years ago, 3-Dec-98, to lugnet.robotics.handyboard)
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