Do you have a source for those shaft encoders that are $19.00 each?
The cheapest I have found is from US Digital and they are around
$35.00 or so.
Thanks
Chris
> A new shaft encoder can be had for $19.00 these days. Adding
> a "second shaft" to any surplus DC motor is a piece of cake if you
> have access to and know how to use a mini-lathe...Or buy a surplus
> motor with encoder. H-bridge ICs are around $5.00, microcontroller
> around $3.00...Here's what's missing....Good PID code for the
> micros....Right now it's under lock and key but will soon trickle
> into the public domain.