The Ring:bit car line following module, light-bar module, and Sonar:bit are dedicated modules designed for the Ring:bit car.

Line following module: Equipped with double infrared probes, it can detect the distance between 2~12mm accurately that can achieve the function of line following around the circles, the detection of the black lines, and the detection of the edge.

Light-bar module: It can bring you multiple colors with simple assembling methods. It comes with 8 Rainbow full-color LEDs. You can update it to a car with auto-headlights and rainbow lights.

Sonar:bit module: This module is installed in the back to make sure it goes freely avoiding any obstacle. It is a 3-wire ultrasonic module with a working voltage between 3-5V. It is available to be used in a 3.3V or 5V micro-controller system. With only one 3-wire(GVS) cable, it can work properly. Compared to the normal 4-wire ultrasonic module, it has saved one IO port. The measurement range of sonar:bit is 4cm-400cm. It can output stable and accurate measurement data with ±1cm tolerance only.

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