Society of Robots - Robot Forum
Electronics => Electronics => Topic started by: danielsoy on October 27, 2013, 01:32:41 PM
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Hi all
Need help to find out optical mice model-maker , that uses optical sensor with quadrature output.
A picture of the mouse, would be nice too.
Or sensor ICs easy to find actually on the market , cause Agilent´s HDNS-2000 , ADNS 2610 and the like, are not.
I ´d use them to measure linear motion
Thanks a lot.
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Do you absolutely need a mouse?
There are many microcontrollers with built-in quadrature decoders, and there are many quadrature encoders available to hook up to whatever rotating part you have.
Or are you looking for contact-less movement measurement, a la optical mice? I don't think those have quadrature output.
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Right Jawatte, a contact-less movement detector to attach direct to a gantry, to avoid backlash
Some optical mice, has ADNS-2030 or OM02-OM01 IC´s that get quadArture outputs.
Those IC´s, has 16 pins .
So, I may connect them right to PIC18fxxx.
Thanks for your reply.
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There are tons of contactless encoders.
Search Mouser or Digi-Key or whatever distributor for "optical encoder" and you'll find a lot of options. The simplest one is a disc with slots, and a reader with two LEDs, that provide quadrature output because of the spacing of the LEDs and the slots in the disc.
There are also nice magnetic encoders that can give you absolute readings, but that seems like overkill for your needs.
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Right, but some ICs or encoders are hard to find here , so I had thought about mice to scrap from.
browsing youtube, catched a couple of videos of mice , that seems has sensors with quad output.
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Where is "here"? Somewhere the mail doesn't reach?
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optical mice use photo arrays that are more like camera sensors. optical rotary encoders would best be harvested from a ball mouse. these are available for 10 cents or so at flea markets, less than a buck on ebay, and can occasionally be seen up in trees hangiing beside sneakers and other things with tails. there are at least two encoders on each pcb. three if theres a wheel.
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Thats right.
Was making tests with encoder wheels mounted on motor shaft actually , and got good results.
Here is how:
http://www.youtube.com/playlist?list=PLMAUjAzkmX20h92jUBkbBYT4HawlYL-4f (http://www.youtube.com/playlist?list=PLMAUjAzkmX20h92jUBkbBYT4HawlYL-4f)
But am looking to attach an optical detector to a gantry, to reduce backlash, and its easier for me to scrap them from
older ps/2 mice.
Some sensors give a serial output to be decoded, and others deliver direct quadrature incremental pulses.
Thanks for your reply.