Subject:
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Re: Motors & handyboard
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Newsgroups:
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lugnet.robotics.handyboard
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Date:
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Wed, 19 Feb 1997 21:25:39 GMT
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Original-From:
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rabbit <g-webb@students.uiuc.edu#saynotospam#>
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Viewed:
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1388 times
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On Tue, 18 Feb 1997, Chuck McManis wrote:
> Driving the Tamiya BullDozer from the HB is certainly possible
> but if you do this I highly recomend an optically isolated external
> H-bridge. The easiest way to do this is to take a four channel
> optoisolator (available from Digikey (1-800-digikey)) to drive
> an integrated H-bridge like the UDN2998W (the L293's really big
Why not use the H-bridge that is already on the bulldozer? If
you work backwards throught the motor driver circuitry, or use the RF
controller to send commands to the dozer and see what voltages change you
can figure out where the inputs to the motor driver circuitry are. Once
you find this you can hook up optocouplers to this part and voila! You
have control of your dozer for the cost of 4 optocouplers (about $.79 each).
Garth Webb
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Message has 1 Reply:
 | | Re: Motors & handyboard
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| (...) This is also excellent advice. On one R/C car I had, I ended up having to simulate the signal input to the controller because the h-bridge was so screwy but it does save you from having to build your own. On a related note, Radio Shack sells (...) (27 years ago, 19-Feb-97, to lugnet.robotics.handyboard)
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Message is in Reply To:
| | Re: Motors & handyboard
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| (...) It has been my experience that it is easier to change the drive circuitry than it is to change the motors. The circuitry is just solder and chips, the motors are mechanical tooling. Driving the Tamiya BullDozer from the HB is certainly (...) (27 years ago, 18-Feb-97, to lugnet.robotics.handyboard)
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