This kit is now discontinued. We've upgraded the Adafruit Motor Shield v1 to v2, with stacking-support and higher-current motor drivers, Please check out the v2 shield - its much better! Here is a ...

Abstract: It is pointed out that a magnetoresistor is very sensitive to flux changes, and may therefore operate with wide tolerances in the air gap between it and the encoder wheel. It may also be ...

For example the they should all share an IO device such as a 23017 or an 8574, or if on arduino pins, all the A pins must be interrupt driven. Secondly, there is a hard limit on the number defined by ...