SparkFun Rotary Encoder - 200 P/R (Quadrature) General Rs. 1 - Rs. 500 This 2xAA battery holder puts

This 2xAA battery holder puts a nice finishing touch on your battery powered project

LCD Datasheet

57600bps TTL serial interface

This is a very common 22pF capacitor

SparkFun Rotary Encoder - 200 P/R (Quadrature) General Rs. 1 - Rs. 500 This 2xAA battery holder putsThis 200 pulse per rotation rotary encoder outputs gray code which you can interpret using a microcontroller and find out which direction the shaft is turning and by how much. This allows you to add feedback to motor control systems. Encoders of this kind are often used in balancing robots and dead reckoning navigation but it could also be used as a very precise input knob. The encoder comes with a set screw coupler which will attach to any 4mm shaft.