3pi Robot


3pi Robot

$114.95 $40.00


The 3pi robot is designed to excel in line-following and maze-solving competitions. It has a small size (9.5 cm/3.7″ diameter, 83 g/2.9 oz without batteries) and takes just 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 to reach speeds up to 100 cm/second while making precise turns and spins that don’t vary with the battery voltage.

The 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, Atmel Studio provides a comfortable development environment, and an extensive set of libraries provided by Pololu makes it a breeze to interface with all of the integrated hardware. The 3pi is also compatible with the popular Arduino development platform. Pololu provides a number of sample programs to show how to use the various 3pi components, as well as how to perform more complex behaviors such as line following and maze solving.

Please Note: An external AVR ISP programmer, such as the Pololu USB AVR programmer is required to program the 3pi robot.


  • Two micro metal gearmotors
  • 8×2 character LCD
  • ATmega328 microcontroller based system
  • Five reflectance sensors
  • Buzzer and three user pushbuttons
  • Capable of speeds exceeding 3 feet per second


Pololu 3pi Robot
Resources: http://www.pololu.com/product/975/resources

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