Society of Robots - Robot Forum
Electronics => Electronics => Topic started by: JAy1st on April 23, 2008, 03:03:32 AM
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Hi all,
Has anyone ever heard of modding a servo to get position feed-back ?
I mean, when you tell it to go in a certain position, you have no way of know it's really where you want it, right ?
So what about connecting a wire to the center pin of the pot (inside the servo to make a Voltage divider) and read it's analog value do know the real position?
Will it mess up with the electronics driving it or not ?
Ideas are welcome !
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google "open servo". Open servo is a project which does just this and more with servos.
You can try wiring straight to the pot, but do it in such a way as to be able to remove it easily because you may cause too much noise on the wire which will give the servo circuit false readings (try a low power small signal diode stright on the poit and a wire from that)
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So what about connecting a wire to the center pin of the pot (inside the servo to make a Voltage divider) and read it's analog value do know the real position?
Will it mess up with the electronics driving it or not ?
sure that will work , I think I've seen people do that before
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I've seen open servo before, it's great and too expensive for a basic type of guy like me ;D
sure that will work , I think I've seen people do that before
Have any references ?
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Have any references ?
Sure
http://www.seattlerobotics.org/encoder/200101/EncoderPos.html
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Not really the same.
That servo is fitted by standard with 4 wires....but gives a hint on what can be done..
Tnx for the link....
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well it will work for all servos , that was just an example
logically, it should work without disturbing anything
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I've seen it done too, just use an ADC on the pot value.