Radio Shack Mobile Robot - Manual (Page 20)

Encoder Sensor
The encoder sensor counts the teeth in the encoder wheel using invisible IR (infrared) light to measure
the distance traveled. The encoder wheel has teeth that interrupt the beam of light. Locate the encoder
sensor and notice the dots placed on it (see the drawing). Mount the sensor using 2 screws, 2 star wash-
ers, and 2 nuts. The encoder wheel will be mounted to the axle later.
Summary:
Locate the encoder sensor.
Mount the encoder sensor on the right wheel bracket according to the drawing.
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Encoder Wheel Encoder Sensor