Rotary Encoder (optical etc.)

[Gary C]

Does anyone happen to know of a specific rotary shaft encoder (part number, source etc.) that will work with the default code that Dave Lavery discussed in the kick-off? It looked (and he mentioned) that the robot had an encoder on the gearbox output shaft of each side of the robot.

We would like something with a resolution of 500 ticks/rev or greater. It would also need to mount onto a shaft that is 1/2" or smaller. Lastyl, we would like to order two of them asap and would prefer not to have to create our own custom circuit.

Thanks!