Original 3pi Robot

The Pololu 3pi robot is a complete, high-performance mobile platform featuring two micro metal gearmotors, five reflectance sensors, an 8×2 character LCD, a buzzer, and three user pushbuttons, all connected to a C-programmable ATmega328 AVR microcontroller. Capable of speeds exceeding 3 feet per second, 3pi is a great first robot for ambitious beginners and a perfect second robot for those looking to move up from non-programmable or slower beginner robots.

The m3pi expansion kit contains everything you need to turn your 3pi robot into an enhanced m3pi robot. The expansion PCB ships with all the surface-mount parts populated, but the included headers, buttons, and connectors must be soldered in.

This kit gives you everything you need to add a second level to your 3pi robot. In this version, the LCD pins are brought up to the expansion board from the base via extended headers for your own custom use. This red printed circuit board can also serve as a general-purpose round prototyping board.

This kit gives you everything you need to add a second level to your 3pi robot. In this version, the LCD pins are brought up to the expansion board from the base via extended headers for your own custom use. This black printed circuit board matches the color of the 3pi and can also serve as a general-purpose round prototyping board.

This kit gives you everything you need to add a second level to your 3pi robot. The black printed circuit board matches the color of the 3pi and has cutouts that let you view the LCD below and make it easier to reach the power button, reset button, and programming header.

This product contains all of the hardware included in the 3pi expansion kit without cutouts, but it does not include the expansion PCB.

This ball caster was originally released as a replacement part for the 3pi robot, but the 1/2″ ball can also be used a replacement part for the newer 3pi+ robot, which has the housing for the ball built directly into the chassis. This ball caster can also be used as a general-purpose ball caster: when mounted through a hole in a chassis that uses our micro metal gearmotors and our 32×7mm wheels, as on the 3pi, this ball caster is just the right height to keep the chassis level.