Subject:
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Problems getting a L298H based motor controller to work...
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Newsgroups:
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lugnet.robotics.handyboard
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Date:
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Mon, 14 Dec 1998 04:49:01 GMT
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Original-From:
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Clem Taylor <CTAYLOR@SRTCsaynotospam.COM>
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Viewed:
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1478 times
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Hi,
On Friday I received a L298H based motor controller kit from JCM
Electronics. The assembly was fairly painless, however I can't seem to
get it to work. I get 5 volts out of the logic battery output, so the
regulator is working. I double checked that all the diodes were properly
connected and I buzzed out all the obvious connections and didn't find any
faults. I also carefully checked for solder bridges and didn't find any.
When I connect +5v from the logic battery output to the left enable and
fwd signal and expected to see 7.2 volts across the left motor output.
But I didn't see anything...
I only have minimal experience working with this type of stuff (I'm a
software weenie) and I don't have the slightest clue how to debug this.
Any ideas what might be wrong or how I might go about diagnosing the
problem?
I've haven't done much assembly like this (wire wrap is more my speed) but
I was fairly careful (anti-static mat, temperature controlled iron). I
thought that the most sensitive part would be the regulator, but it seems
to be working just fine. I thought the L298 was a fairly tough part, so
if I fried it, I'm going to be in big trouble when I start working with
PICs (next step).
Also, my voltage source is a freshly charged 7.2 volt RC car battery and
I'm using a HandyBoard for the control (as soon as I get this thing to
work).
Many thanks,
Clem
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