Subject:
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Re: More Output ports!
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Newsgroups:
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lugnet.robotics
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Date:
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Mon, 8 Mar 1999 11:55:28 GMT
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Viewed:
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982 times
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With careful design, you could also use your 3rd (relay control) port
for controling a motor in one direction in each state. If you were
really desperate you can blast some power out from one of the inputs too
:)
If you could use an input to control the relay then you can easily have
6 outputs.. but if you used some fancy electronics and diode
arrangements then I'm sure you could have 8 outputs. (2^3) But that
would only work well if you only wanted one motor working at one time..
Cheers,
Richard
John Brubaker wrote:
>
> Hi All - I posed a question a couple of weeks back about using small
> relays to switch control of outputs in order to use more motors.
> Since nobody said they had done it, I went ahead and bought some
> parts from Radio Shack, and built a small switching device - it works
> great. Here's what I wanted to accomplish:
>
> Robot uses 2 motors for traveling, then stops and switches to another
> set of 2 motors to control an arm and gripper hand. The 3rd output is
> used to control which set of 2 motors gets control at any one time.
>
> My robot uses 2 powered treads for forward, reverse, and turn. The
> gripping arm uses a motor to raise and lower, then another motor
> controls a pneumatic switch to open or close the claw using a small
> air cylinder. It all works quite well. If anyone's interested in the
> switching device, I'll post some pictures of it this week. It fits
> into a Lego brick 2 pegs x 6 pegs x 6 thick. Regards --- John.
--
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Message is in Reply To:
 | | More Output ports!
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| Hi All - I posed a question a couple of weeks back about using small relays to switch control of outputs in order to use more motors. Since nobody said they had done it, I went ahead and bought some parts from Radio Shack, and built a small (...) (26 years ago, 7-Mar-99, to lugnet.robotics)
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