I2C/SPI Quad Decoder

by 020110348 on Fri Feb 08, 2013 7:43 am

Hi Everyone,
Im looking to upgrade my current CNC Setup. it currently has 2 250ppr encoders, I would like to be able to interface those directly to either a Raspberry Pi or Arduino Due. even just decoding the encoder one arduino (mega 1280) has a hard time keeping up.

The End-Goal: Have either one or two chips that i can request the current position from. E.x. command the controller to spin motor -> read from chip -> compare reading to desired -> adjust motor.

In summery i am looking for a chip that can decode a 5v Quadrature Encoder. AND Speek 3.3v I2C/SPI. to take the load off the controller.
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Joined: Mon Apr 23, 2012 7:22 pm

Re: I2C/SPI Quad Decoder

by Zener on Fri Feb 08, 2013 1:17 pm

http://www.avagotech.com/pages/en/motio ... ecoder_ic/

The last 2 in the list seem to be the most common, but you will have to look at the data sheets to see which will be best for you.
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Joined: Sat Feb 21, 2009 1:38 am