Gravity: TT Motor Encoders Kit (20 PPR)

The Gravity: TT Motor Encoders Kit is a non-contact optical sensing solution designed to deliver reliable wheel speed feedback and odometry for TT-style micro DC gear motors. It provides 20 pulses per revolution to enable accurate motion tracking and closed-loop control on compact robotic platforms. This kit is ideal for students, educators, and makers working on differential drive rovers, line-following projects, and STEM robotics prototypes.

Non-contact optical detection

The module uses an optical grating disk paired with a digital optical sensor to detect rotation without physical contact. This non-contact design eliminates mechanical friction and wear, ensuring consistent long-term stability in mobile robotics builds.

Precise 20 PPR resolution

With a resolution of 20 pulses per revolution (PPR), the encoder converts wheel movement into measurable angular displacement signals. This level of precision is well suited for calculating real-time speed, managing motor control loops, and performing odometry estimation.

Gravity plug-and-play connectivity

Featuring standard three-pin Gravity digital cables, the kit connects directly to Arduino and Raspberry Pi IO expansion shields. This plug-and-play interface simplifies wiring and speeds up deployment in classroom and prototyping environments.

Low-power 5V operation

Operating at a standard +5V voltage, the lightweight 20g encoder kit features low current consumption tailored for battery-powered platforms. It integrates smoothly into small rovers without placing excessive strain on power systems.

Complete mounting hardware kit

The package includes two grating disks, two digital cables, plastic covers, rubber rings, washers, and M3 mounting screws. This full set of components provides everything needed to mount the encoders directly onto compatible TT micro geared motor assemblies.

Downloads & documentation

• Product wiki (DFRobot)