Subject:
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Re: More outputs, thinking outside of the box...
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Newsgroups:
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lugnet.robotics
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Date:
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Thu, 11 Mar 1999 21:51:38 GMT
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Viewed:
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1078 times
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John Brubaker writes:
> Dennis - How can you make use of the 3rd. motor if it needs to be
> available to bump the switch? Also, how would you deal with the
> polarity going to the 2nd set of motors? Thanks --- John.
Often you don't need continuous motion, eg. robot arm, and you can keep
to a limit. If you use another bump switch to tell the RCX that the motor
shouldn't turn any more you can stop the action before you get to the
second bump switch that changes the mode.
Hmm, I see your point. You will need a set of switches for _every_
motor, one set will only switch one motor. However, it can't be any more
expensive than all of that complex linkage in the other thread! And for
cheap, you can make your own switch that is SPDT for less than $2.00
with a micro switch of your own.
Darn, I _knew_ it was too simple to work out that way! You will need a
pair of switches for each _side_ of each motor pair so you can switch power
polarity. This means that your Rube-Goldberg lever now must handle four
switches per pair of motors! Is it still viable? Its no worse than any
other solution and needs a lot less mechanical precision! I still see a
simple cam mechanism with a rubber band default, it just has ganged levers
and stacks of switches!
have fun,
DLC
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Message has 2 Replies:
 | | Re: More outputs, thinking outside of the box...
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| To get more electrical about it, how about making a voltage gate for the third output, that according to what voltage you set the third output to (between 1 to 9 volts), it switches on different sets of motors? Also, polarity changes could trigger (...) (26 years ago, 12-Mar-99, to lugnet.robotics)
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