Subject:
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Re: Reducing Battery Pack Voltage
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Newsgroups:
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lugnet.robotics.handyboard
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Date:
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Sat, 1 Mar 1997 04:26:56 GMT
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Original-From:
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MAR ERICSON <MAR@COOPERihatespam.EDU>
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Viewed:
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1527 times
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I think I might have wrote something wrong before.
I said that you can use an external battery of 3V.
I take it back. Sorry...
I didn't realise that it would only work for 6 volts to 36 volts.
Ooops. :b
ericson mar
Master of Engineering Candidate
Project: Mobile Robotics
mar@cooper.edu
Department of Mechanical Engineering
The Cooper Union for the Advancement of Science and Art
On Fri, 28 Feb 1997, Fred G. Martin wrote:
> as has been discussed on this list, the Handy Board wasn't really
> designed for three volt toy motors. Reducing the voltage and doubling
> the motor chips is a reasonable approach, however.
>
> The Handy Board requires 7.2 volts to operate, because of the voltage
> drop inherent in the main voltage regulator. That is still a little
> high for running three volt motors.
>
> If you were to take a 4.8 or 6.0 volt tap off the battery pack, you
> could run that voltage into the motor supply using the "how to run
> motors at other voltages" hack described in the Handy Board FAQ.
>
> This could be a nice solution because you wouldn't use additional
> batteries.
>
>
> -Fred
>
> --
> This message was composed using Articulate Systems' PowerSecretary,
> a Macintosh-based speech-to-text dictation system.
> Please forgive any sloppiness in the formatting. Thanks. -Fred
>
>
>
> In your message you said:
> > Hi Fred
> >
> > I am attemping to run two low voltage DC motors (as motors 0 and 1),
> > around 3V each(I don't have specs). I have piggybacked two of the motor
> > driver chips (and maybe adding a third) to handle the higher current but
> > they are still getting quite warm.
> >
> > I would like to reduce the voltage supplied to the motors in hopes that
> > it will limit the current drawn and not heat up the chips.
> >
> > Can the battery pack in the HB be reconfigured to supply half the
> > voltage without affecting the HB operation? and if so do you think this
> > might be a solution?
> >
> > Thanks
> >
> >
> > =================================
> > Ken McHugh
> > Comp. Eng. Student at Humber Col.
> > mchughk@idirect.com
> > =================================
>
>
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Message is in Reply To:
 | | Re: Reducing Battery Pack Voltage
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| as has been discussed on this list, the Handy Board wasn't really designed for three volt toy motors. Reducing the voltage and doubling the motor chips is a reasonable approach, however. The Handy Board requires 7.2 volts to operate, because of the (...) (28 years ago, 1-Mar-97, to lugnet.robotics.handyboard)
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