Quadrature Decoder

Hi all.

I need read a 3 wire (ABC) rotary encoder like a button pressed for up or down a counter.

Exist any code about this ?

How i can make this ?

Thanks for members help.

I'm pretty sure you can find some example of that. Try searching using keyword ENCODER not decoder. Also it's not ABC, it's A B and Index.

You can also use PIC18F2331/2431/4331/4431. It has a quadrature decoder built-in the chip, called QEI module. Really nice to use with extra feature like noise protection. It's counting up or down according to A and B pulse, for CW and CCW rotation. Then you just have to read a register.


J-P