Pololu 3pi Robot
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 Pololu Adjustable Boost Regulator 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. There is a number of sample programs to show how to use the various 3pi components, as well as how to perform more complex behaviours such as line following and maze solving.
The 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 push buttons, all connected to a C-programmable ATmega328 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.
- Processor: ATmega168/328P
- Motor Driver: TB6612FNG
- Motor Channels: 2
- User I/O lines: 2
- Minimum Operating Voltage: 3V
- Maximum Operating Voltage: 7V
- Maximum PWM Frequency: 80 KHz
- External Programmer Required?: Yes
- Pololu 3pi Robot User’s Guide
- Pololu AVR Programming Quick Start Guide
- Pololu AVR C/C++ Library User’s Guide
- Pololu AVR Library Command Reference
- Building Line Following and Line Maze Courses
- Programming Orangutans and the 3pi Robot from the Arduino Environment
- Sample Project: 3pi Wall Follower
- Sample Project: RC 3pi
- 3pi quick-start sheet and schematic
- 3pi simplified schematic diagram