	Pololu 42x19mm Wheel and Encoder Set SG$59.90
This set includes a pair of 42x19mm wheels, a pair of extended brackets, and two matching encoders. Just pick a pair of micro metal gearmotors to complete your feedback-enabled drive system. [Product Details...]

	Encoder for Pololu Wheel 42x19mm SG$23.00
This quadrature encoder works with the micro metal gearmotors, 42x19mm wheel, and extended bracket to measure the rotation speed and direction of the wheel. With twelve teeth on the wheel, the system provides a resolution of 48 counts per revolution, whic [Product Details...]

	Analog Rotation Sensor V2 SG$9.70
This V2 Rotation Sensor is arduino compatible multi-ring rotation sensor. It is based on multi-turn precision potentiometer. It can rotate upto 10 laps. The voltage can be subdivided into 1024 copies. With the usage of special sensors expansion can be ac [Product Details...]

	Rotary Encoder SG$4.50
This is a 12-step rotary encoder with a nice 'clicking' feel. It's breadboard friendly, and has a pretty handy select switch (by pushing in on the knob). The encoder is different from a potentiometer in that an encoder has full rotation without limits. Th [Product Details...]

	Rotary Encoder - 1024 P/R (Quadrature) SG$67.00
This 1024 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 kin [Product Details...]