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 23:25:19 GMT
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Original-From:
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somewhere@unm.NOMORESPAMedu
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Viewed:
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2460 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.
ruizvic@mx1.ibm.com wrote:
>
> Hi to all, I would like to know
> what difference there are if I connect the
> 6 diodes between the Handy Board & the Polaroid Sonar Card. Can I connect
> the cards without diodes?
> I tested the voltage at the Catode at the end of the 6th diode and my
> Voltmeter showed 4.5 volts.
>
> Should we use the 3 amp diodes?
> Could somebody advise?...
>
> Thanks in advance for your information. :-)
>
> Victor G. Ruiz Aranda ruizvic@mx1.ibm.com
> Development Software
> T/L 877-7306. Ph Number 011-523-669-7306
> GPL Guadalajara, Jal. Mexico.
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Message has 1 Reply:
 | | Re: Sonar question
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| (...) 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 (26 years ago, 3-Dec-98, to lugnet.robotics.handyboard)
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Message is in Reply To:
| | Sonar question
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| Hi to all, I would like to know what difference there are if I connect the 6 diodes between the Handy Board & the Polaroid Sonar Card. Can I connect the cards without diodes? I tested the voltage at the Catode at the end of the 6th diode and my (...) (26 years ago, 3-Dec-98, to lugnet.robotics.handyboard)
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