Subject:
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Re: Motor LEDs not illuminated
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Newsgroups:
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lugnet.robotics.handyboard
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Date:
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Wed, 23 Oct 1996 20:20:51 GMT
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Original-From:
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Prabal Dutta <dutta@cis.ohio-stateSPAMLESS.edu>
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Viewed:
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1518 times
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Hi Greg,
Maybe you swapped the HC374 chip and the HC244 that sits next to it?
Maybe the HC374 is in backward? Just my two cents - hope that helps.
- Prabal
>
> In building a Handyboard, all was well until the Motor Output Circuit.
> When running testmotor() none of LED1-8 illuminate. The LED polarity is
> correct, the debuggin steps in the manual seem to check out.
>
> I've built a 6.270 board successfully before so I _think_ I know what I'm
> doing, but I'd sure appreciate any suggestions!
>
> *****************************************************************
> * Greg Starr, Professor and Graduate Advisor *
> * Department of Mechanical Engineering ph (505) 277-6298 *
> * University of New Mexico, Albuquerque NM 87131 FAX 277-1571 *
> * email- starr@unm.edu WWW- http://pliers.unm.edu/~starr/ *
> *****************************************************************
>
>
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Message is in Reply To:
 | | Motor LEDs not illuminated
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| In building a Handyboard, all was well until the Motor Output Circuit. When running testmotor() none of LED1-8 illuminate. The LED polarity is correct, the debuggin steps in the manual seem to check out. I've built a 6.270 board successfully before (...) (28 years ago, 23-Oct-96, to lugnet.robotics.handyboard)
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