Pololu 3pi Robot Click on images to enlarge

Starting From: $79.95

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Pololu 3pi Robot

Pololu 3pi Robot is a complete, high-performance mobile platform featuring two micro metal gear motors, five reflectance sensors, an 8×2 character LCD, a buzzer and three user pushbuttons. All this is connected to a C-programmable ATmega328 microcontroller. Capable of speeds exceeding 3 feet per second, Pololu 3pi Robot 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.

Features of Pololu 3pi Robot


  • The Pololu 3pi robot has a small size (9.5 cm/3.7" diameter, 83 g/2.9 oz without batteries)
  • The robot is powered by four AAA cells (not included), while a unique power system runs the motors at a constant 9.25 V independent of the battery charge level
  • The regulated voltage allows the 3pi robot to reach speeds up to 100 cm/second, while making precise turns and spins that don’t vary with the battery voltage
  • The Pololu 3pi robot makes a great platform for people with C programming experience to learn robotics, and it is a fun environment for ambitious beginners to learn C programming
  • At its heart is an Atmel ATmega328P microcontroller running at 20 MHz and featuring 32 KB of flash program memory, 2 KB RAM, and 1 KB of persistent EEPROM memory
  • The popular, free GNU C/C++ compiler works perfectly with the 3pi robot
  • The 3pi robot is also compatible with the popular Arduino development platform
  • Required Accessories
    • An external AVR ISP programmer, such as our USB AVR programmer is required to program the 3pi robot
    • 4 AAA batteries, which are not included


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  • Size: 3.7" diameter

General specifications

  • Processor: ATmega168/328P
  • Motor driver: TB6612FNG
  • Motor channels: 2
  • User I/O lines: 21
  • Minimum operating voltage: 3 V2
  • Maximum operating voltage: 7 V2
  • Maximum PWM frequency: 80 kHz
  • Reverse voltage protection?: Y
  • External programmer required?: Y


1. Digital I/O lines PD0 and PD1 are available; two more analog inputs and one analog/digital pin can be made available by removing jumpers and disabling special features of the board.

2. Designed for use with 4 x AAA NiMH or Alkaline cells. A step-up regulator boosts the motor voltage to 9.25 V.

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