Quad encoder problems

[SteveB]

I got it working! Sort of. I played arround with different value resistors and some diodes as sugested by mister_e and ended up with 30K resistors. Also seams my pic16f628-20p dosnt have a very accurate osc in it. I hooked up an external resonator and it works at 20mhz using Steve's slightly modified code from post #12. Thanks Steve!
The only thing now is it sometimes skips or looses count. Either the pic running at 20mhz cant keep up or the infrared red rx cant keep up. These encoders came out of a PS2 computer mouse. The ones that turn off the ball.

Any ideas guys?

Thanks!
Smitty

Now your walking, time to RUN!! Go back to post #6 and give the interrupts a try. With the optical encoders and interrupts, you should have not any switch bounce, and you should also not have any "skips". Well, if it turns faster than the interrupts can process the inputs, you can have some skips, but the nice thing about the interrupts is that the updates to the rotarty encoders count will not "wait" on the LCD output to finish.

Give it a shot,
Steve