Subject:
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Re: 3v motors
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Newsgroups:
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lugnet.robotics.handyboard
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Date:
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Thu, 7 Aug 1997 16:03:18 GMT
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Original-From:
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MAR ERICSON <mar@cooper[Spamcake].edu>
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Viewed:
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1609 times
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If you try to regualte the voltage to 3V You will still loose the extra
power as in using a resistor. You lose it in the form of heat to be
specific. Using a regulator will give you the 3V you need at continuous
output. I'm not sure how voltage regulators behave at 1 ms PWM switching.
Maybe someone knows or you can check the specs of the IC you plan to use.
The better alternative is to check the HB HP FAQ on using different motor
power sources. I think its better to use an external source so you won't
interfere with the HB power and you can use alkalines for the motors so
they last a little longer. My opinoin anyway.
-----------
ericson mar
Master of Engineering Candidate
Project: Mobile Robotics
mar@cooper.edu
(212)353-4356
Department of Mechanical Engineering
The Cooper Union for the Advancement of Science and Art
-------------------------------------------------------
On Mon, 4 Aug 1997, Mike Downey wrote:
> I have a cute little tracked robot base i want to run from a handyboard,
> but the problem is that it has 3V motors. The handyboard is set up to
> power 9v, right? The way i see it, i can either just put a resistor in
> series with the motor to drop the voltage reaching the motor, but that
> will eat up valuable battery power, or i can try to regulate the voltage
> coming out of the motor driver chips. Is there an easy way to drop this
> voltage?
>
> Thanks
> Mike
> --
>
> ,,,
> (o o)
> ==========================oOO==(_)==OOo==========================
>
> F U cn rd dis U mst uz Unix.
>
> http://www.eng.ua.edu/~mdowney
> Mike Downey mdowney@eng.ua.edu
>
> http://www.cw.ua.edu/ .oooO Oooo. http://www.bamamag.com
> ==========================( )==( )===========================
> \ ( ) /
> \_) (_/
>
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Message has 2 Replies:
 | | Re: 3v motors
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| With the modification mentioned in the the FAQ, can you power 3V motor at 3V with external power? The FAQ mentions external 6-36V and L293D spec sheet says that the minimum Vs is Vss (which has a minimum 4.5V). The modification doesn't change Vss, (...) (27 years ago, 7-Aug-97, to lugnet.robotics.handyboard)
| | | More juice
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| Can you parallel a 9.6v eight pack NiCad cell to the HB Nicad pack? Has anyone done this with success? If so, does it charge properly? jm (...) (27 years ago, 11-Aug-97, to lugnet.robotics.handyboard)
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Message is in Reply To:
| | 3v motors
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| I have a cute little tracked robot base i want to run from a handyboard, but the problem is that it has 3V motors. The handyboard is set up to power 9v, right? The way i see it, i can either just put a resistor in series with the motor to drop the (...) (27 years ago, 5-Aug-97, to lugnet.robotics.handyboard)
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