Subject:
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Re: Motor Problems
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Newsgroups:
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lugnet.robotics.handyboard
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Date:
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Thu, 6 Feb 1997 05:51:41 GMT
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Original-From:
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Bill Richman <bill_r@inetnebr.(spamcake)com>
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Reply-To:
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BILL_R@INETNEBR.stopspamCOM
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Viewed:
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3386 times
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Geeze - sounds like my kind of luck. Well, according to the Handy
Board FAQ, there are two varieties of the 293; the 239B and the 293D
- the "D" is rated at 600mA/channel and has spike suppression diodes
built in, while the "B" is rated at 1A/channel, but has no diodes.
The HB I got from Gleason Research has the TI SN754410 driver on it,
which gives you 1A/channel *and* the protective diodes. The FAQ says
the TI chip is a plug-in replacement for the L293. Maybe this would
help. Best wishes for a speedy recovery!
> I left a email about my motor problem earlier this evening. Well, since
> then I have changed my code to use ports 2 and 3 and the bot worked just
> fine for a little while, then both 293 chips smoked. I guess I was drawing
> too much current. Anyway I am completely out of business right now. I
> believe that I saw a higher rated substitute mentioned on the mailing list.
> Is there a motor driver chip that can take the amp draw. I am guessing that
> this is what happened. If anyone has any other ideas please send me a line.
> Do you think it hurt anything else when the 293's fried? My board still
> comes us just no motors or leds at all!
> If you have any solutions for this problem please post them. It is pretty
> discouraging since I just got my code working.
>
> Thanks
>
> Bill Rose
>
>
-Bill Richman
bill_r@inetnebr.com
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Message is in Reply To:
 | | Motor Problems
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| I left a email about my motor problem earlier this evening. Well, since then I have changed my code to use ports 2 and 3 and the bot worked just fine for a little while, then both 293 chips smoked. I guess I was drawing too much current. Anyway I am (...) (30 years ago, 6-Feb-97, to lugnet.robotics.handyboard)
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