Subject:
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Re: motor voltages
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Newsgroups:
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lugnet.robotics.handyboard
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Date:
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Mon, 24 Feb 1997 09:10:15 GMT
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Original-From:
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Peter Harrison <peter.harrison@cannock.ac.ukIHATESPAM>
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Viewed:
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1415 times
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On Sat, 22 Feb 1997 20:27:17 -0600 Dostald
<david.j.dostal@lawrence.edu> wrote:
> Hello again,
>
> Thanks to all who responded to my query regarding motor chips on the
> Mini Board. Now that I have the more capable motor drivers installed, I
> want to lower the voltage that my motors see. They are getting straight
> 9V from the motor chips now, but they (and I) would be happier at 6V. I
> have heard on this mailing list that there is a way to do this with a
> diode array. Can anyone refer me to a schematic in a book or just
> describe it well enough in ASCII?
You can use diodes to drop the voltage but you need to
attack the HB, cutting traces and so on.
Depending on how you are mounting things, why not just use
a lower voltage battery pack? Six Nicad cells give a
nominal 7.2 volts, enough to drive the board with the
regulator I have (just) and, by the time the motor druver
has had its share, you get about 5-6 volts at the motor
outputs. This is just about right for driving converted
servos.
----------------------
Peter Harrison
Peter.Harrison@cannock.ac.uk
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