Subject:
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Re: Toy motors
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Newsgroups:
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lugnet.robotics.handyboard
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Date:
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Fri, 22 Jan 1999 23:52:52 GMT
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Original-From:
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Andre Philippi <philippi@earthlinkSTOPSPAM.net>
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Viewed:
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931 times
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I was reading the FAQ (again), and unless I overlooked something, it seems that even with the H-bridge or piggybacking solutions, I would not be able to drive a high-end R/C car engine (20+ amps)...
So here are my questions:
1 - Could I lower the amount of current draw, by doing something like motor(1, 20); ? How much lower could I go by doing this ?
2 - Is there any hack that I could do on the motor (like yanking or adding some of the internal wiring), that would make it draw much less current ? I apologize if this is too stupid of an idea, but as you may have noticed from this (and previous) postings, I'm very new to eletronics... :(
3 - What else could I do ? Any other ideas ? I guess replacing the engine altogheter is not an option, because the engine has some specific (I don't know how standard that is...) mounting points...
4 - Has anyone used the HB to drive a high end R?C car ? What was your solution to the above problem, please ?
Best regards,
Andre Philippi.
Will Bain wrote:
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
> Steve Wall wrote:
>
> > 1. Can you construct circuitry to limit current and voltage draw to
> > operate these.
>
> Sure, just hack your HB to use an external battery for the motors. The
> external battery can be whatever voltage the motors prefer (within
> reason). If the motors still draw too much current, try piggybacking
> another set of motor driver chips on top of the ones you already have.
> See the FAQ for details.
>
> > I purchased a motorized bulldozer for my base and It is quite large
> > and would make an excellent base and I want to use this for my base
> > could you please help I wouldn't want to think i wasted my money.
>
> With the cheaper motors and the modifications suggested above, the
> bulldozer ought to run just fine. The main difference remaining is that
> the cheap motors are usually not as efficient as more expensive motors
> would be, so you may have to recharge the motor battery more often. No
> big deal! Good luck.
>
> -- Will
> , ,
> __@_/ \_@__ |/
> | /__, o @_/
> )\ ) ( \ (\/\\,
> ~~~~~~~~~ ' ` ~~~~~~~~~~~ ` ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> Wendy Parson, Maybe this world
> Will Bain, is another planet's hell.
> & Tatoosh --Aldous Huxley
=================================================================
Andre Philippi - Applications Developer | Phone: 626-296-5016
philippi@corp.earthlink.net | Fax: 626-296-5113
Earthlink Network, Inc. | 3100 New York Drive
http://www.earthlink.net | Pasadena, CA 91107
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