Subject:
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Re: I hope someone can help me...
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Newsgroups:
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lugnet.robotics.handyboard
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Date:
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Thu, 22 Apr 1999 18:15:45 GMT
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Original-From:
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Tom Brusehaver <TGB@COZY.CORE.WAMNET.avoidspamCOM>
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Reply-To:
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tgb@wamnetSTOPSPAMMERS.com
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Viewed:
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976 times
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> I am planning on getting some LMD18200 motor driver chips from National
> Semiconductor and I found some info about which pins go to what by doing a
> search in the H-Board archive. Great resource by the way. It expalains how
> to take one of the standard motor drivers out of the board and replace it
> with .1" headers and run wires to an offboard 18200 chip. This is
> fine. The
If it is the note I posted, also get the followup. The initial post I
think I made a couple errors, and then someone said their chips got
hot :-o. Anyway a followup post corrected the information.
> info that I found only gave instructions for pin-outs for running one chip.
> I would like to run two and still have one of the standard motor drivers in
> place. There are two "enable pins" (pin 1 and pin 9) on the std h-board
> chip. These pins, at least pin 1, seems to coorespond to the direction
> signal input, of which there is only one, on the LMD18200. Does this mean I
> can connect two LMB18200s two one standard h-b socket? If so, does it
> matter which PWM input and output pins on the HB should be connected to a
> second LMD18200?
If you look at the pinouts for the 293 chip, there are 2 h-bridges in
the single chip. Using corresponding pins, you can connect 2
LM18200's to a single socket. You should connect the corresponding
forward pin to the same 18200 as you connected the enable pin. So
pins 1, 2 (or 7) are for one LM18200, and 9, 10 (or 15) are for the
other.
Make sure you heat sink the LM18200, they will get hot unless they are
really lightly loaded.
Good luck
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Message is in Reply To:
 | | I hope someone can help me...
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| I am planning on getting some LMD18200 motor driver chips from National Semiconductor and I found some info about which pins go to what by doing a search in the H-Board archive. Great resource by the way. It expalains how to take one of the standard (...) (25 years ago, 22-Apr-99, to lugnet.robotics.handyboard)
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