Subject:
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Re: Lego motor reverse with 2 switches
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Newsgroups:
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lugnet.robotics
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Date:
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Sat, 5 Apr 2003 17:28:09 GMT
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Viewed:
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2016 times
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You could make a half H-bridge:
--------| i-------------| i---------
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/ Motor /
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------------------------------------
Remember that you have to program a dead time between the switches so as
not to short the batteries.
You could also make a full H-Bridge, using each switch to drive 2 fets:
Battery Pos ---------------------------------------
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/ A / B
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------------- Motor----------------
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/ B / A
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Battery Neg ---------------------------------------
Again, you need to have dead time between the switches to prevent a short.
Teoman Naskali wrote:
> I built a lego robot, I am using linux as operating system. I also have a
> simple circuit connected to the printer port that has 4 switches. (I can
> activate or deactivate 4 circuits) .
>
> My robot has 2 motors, and i need to forward or reverse each of them.
>
> Thsi leaves me wit 2 switches per motor. Now how can I do forward and
> reverse? One way is easy wiht a one switch, but when i try to add reverse i
> get a short circuit
>
>
> ----| i------
> | |
> | |
> | / switch
> | |
> | |
> + -
> \ motor /
>
>
> Hope i could explain my problem
>
>
> Thanks in advance
>
> Teoman Naskali
>
>
>
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Message is in Reply To:
 | | Lego motor reverse with 2 switches
|
| I built a lego robot, I am using linux as operating system. I also have a simple circuit connected to the printer port that has 4 switches. (I can activate or deactivate 4 circuits) . My robot has 2 motors, and i need to forward or reverse each of (...) (23 years ago, 5-Apr-03, to lugnet.robotics)
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