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3pi Expansion Kit without Cutouts
3pi Expansion Kit without Cutouts

3pi Expansion Kit without Cutouts

Your Price: $19.95
In Stock.
Part Number:978


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.

The expansion PCB matches the diameter of the 3pi chassis and mounts just above the tops of the wheels using the four included screws and spacers. Once assembled, the PCB has electrical connections to the base that allow you interface your own electronics with the 3pi robot, which is sold separately. These connections give you access to the ATmega168′s LCD pins, ISP programming pins, and free/jumpered pins, as well as to the three on-board voltages: VBAT (battery voltage), VCC (regulated 5V), and VBST (regulated 9.25V that is supplied to the motors). Additionally, the expansion PCB connects to the base’s power button and battery charge port, allowing you to add your own power buttons and charge ports.


  • Round printed circuit board (PCB) with holes spaced on a 0.100″ grid
  • two extended 2×7 male headers
  • two extended 1×2 male headers
  • one 2×7 female header
  • two 1×2 female headers
  • four 7/8″ nylon spacers
  • four 1-1/4″ screws
  • four nuts

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