The Romi Encoder Pair Kit adds magnetic quadrature sensing to the mini plastic gearmotors on a Romi chassis. Two sensor boards detect the movement of the accompanying magnetic discs and provide digital signals for evaluation by a microcontroller. This enables motor rotation and the corresponding wheel movement to be measured.
The boards solder directly to the rear motor terminals, with the extended motor shaft passing through the central board opening. Power connects through VCC and GND. Outputs A and B require pull-up resistors to the appropriate logic voltage. The connection layout supports compatible Romi control boards or individually wired electronics.
Highlights
Magnetic sensing with Hall effect sensors and magnetic discs.
12 counts per motor revolution when counting both edges of both channels.
Sensor supply range of 3.5 to 18 V.
Digital quadrature outputs for connection to microcontrollers.
Compact layout within the rear motor cross section on three sides.
Technical Features
Sensing per board: two Hall effect sensor channels and a six-pole magnetic disc.
Resolution: 12 counts per motor shaft revolution, approximately 1440 per Romi wheel revolution.
Supply voltage: 3.5 to 18 V.
Outputs: A and B, digital open-drain signals.
Connections: six through-holes at 2.54 mm pitch; no fitted connector.
Dimensions: 20 × 18.7 mm.
Weight: 3.0 g.
Installation envelope: 11.5 × 22.5 mm motor cross section; connection side extends 7 mm.
Compatibility: mini plastic gearmotors on the Romi chassis.
PCB markings: rom03a and 0J10033.
Application Areas
Measuring motor revolutions on a Romi chassis.
Evaluating wheel movement for Romi robot odometry.
Connecting quadrature feedback to custom microcontroller circuits.
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Manufacturer according to GPSR Pololu Corporation, Pilot Rd. 920, 89119 Las Vegas, Nevada, Vereinigte Staaten, [email protected], https://www.pololu.com/
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