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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Mon, 7 Apr 2003 13:40:56 GMT
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Original-From:
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Rob Limbaugh <RLIMBAUGH@GREENFIELDGROUP.COMnomorespam>
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Viewed:
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945 times
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Teoman,
Go to Google and search "h-bridge circuit" or "h-bridge schematic".
This one came up and looks pretty good:
http://www.robotroom.com/HBridge.html
It allows control of 9.6V to 18V DC motors using pulse width modulation.
Two circuits would use 4 lines from the computer. Two bits would be
used for motor speed control and two bits for direction.
Hope that helps.
- Rob
-----Original Message-----
From: Teoman Naskali [mailto:tnaskali@gsu.edu.tr]
Sent: Saturday, April 05, 2003 5:30 AM
To: lego-robotics@crynwr.com
Subject: 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 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------
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| / switch
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+ -
\ motor /
Hope i could explain my problem
Thanks in advance
Teoman Naskali
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