Subject:
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RE: Using the Motor as a Tachometer
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Newsgroups:
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lugnet.robotics
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Date:
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Mon, 9 Aug 1999 22:54:23 GMT
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Viewed:
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819 times
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> > In fact, this is how the RCX motor controller internally sets the motor up
> > for "brake" instead of "off"...
>
> No way! Really? Too cool! Does it do this with some kind of switching
> relay or is it purely electronic?
Totally electronic...but we used to do it with switching relays...use a
non-proportional font for the following...
/+------------ V+ from power supply
+--/
| +---+
+------+---+ | <- This is really a low value resistor
--|MOTOR | | not connected to V-
+------+---+ /+---+---------V- from power supply
+--/ |
+---+
RELAY
This is how it used to be done with a relay...if you open up the
short circuit, you get the floating effect.
Cheers,
Ralph Hempel - P.Eng
------------------------------------------------------
Outside of a dog, a book is a man's best friend.
Indside of a dog, it's too dark to read...
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Reply to: rhempel at bmts dot com
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