High-quality ABS Rotary encoder disc 20 holes for motor speed Test Robot sensor you can program any encoder with a microcontroller to count the speed and the angle of the shaft using this disk on the shaft Designed for TT motors, smart robot DIY part. by calculating the number of space rotations through which the vehicle speed and distance traveled you can  speed Test your robot

Package Includes:

 1 x  20 holes encoder disc

And this video will teach you how to use 20 Holes Coded Disc for Encoder Motor and Speed Sensor :