Subject:
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Re: Increasing current output to motors on HandyBoard
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Newsgroups:
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lugnet.robotics.handyboard
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Date:
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Fri, 9 Apr 1999 05:25:19 GMT
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Original-From:
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Gary Livick <(glivick@)nospam(pacbell.net)>
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Viewed:
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995 times
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Another solution to this which is easier but more expensive is to use the
output of the motor driver chip to drive solid state relays. You need the
relays that use 5 volts for control and that will switch DC. The relays I use
have flyback diodes in them, but I don't know that all do so a user would need
to add them if they were not included.
Four are needed.
Gary Livick
Chuck McManis wrote:
> At 11:46 PM 4/8/99 -0400, Ian Nieves wrote:
> > ...Is there
> > some stacking that would allow more current to pass safely? (I am
> > looking for a relatively simple solution that can be implemented quickly
> > and easily.) Can i stack two TI sn754410ne on top of each other?
>
> Stacking the chips is doable but you will toast them when you get near
> their current limit. An easier solution is to use the TI chips to drive
> power transistors that are acting as voltage followers. This lets them take
> the current. Alternatively you can pull the L293 chips out of the board and
> wire the sockets up to some National LM18200 H-bridges that will handle
> these motors at 12volts.
>
> --Chuck
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