RE: Basic Stamp + Encoder

The PIC makes a great chip for quadrature decoding.
I wrote some code just a couple months ago. If I remember correctly,
I was able to continually poll the encoder input lines every 1 to 2
microseconds! Used about a dozen lines of code, and a 16 byte lookup
table. This was a more dedicated routine and interrupts were not
necessary. At this rate I have little worries about missed steps.

My code is at work, and I won't be able to retrieve it till Tuesday,
If you want a copy let me know, however... I think you are well
informed all ready.

I you look into using PIC's, think about the 'flash' series such as
the 16F873. Very easy and quick to program and reprogram and
reprogram and ....

Very inexpensive and habit-forming. I use them for everything.

Also... Look into the SX series of chips. Also available from
www.parallaxinc.com , they are pin and program compatable with the
PIC series, but run at 50 - 75 Mhz and execute every clock instead of
4 clock cycles in the PIC. Also inexpensive chips.

Thomas Mayfield

PIC my Brain or PIC my Nose, but never PIC my Pocket.