Kit to expand the Pololu 3pi robot to Pololu m3pi with a mbed socket board. Includes non-soldered PCB as well as necessary connectors and components for self-assembly. Pololu 2152

Bipolar stepper motor. It has a resolution of 200 steps/revolution (1.8° per step), a rated voltage of 3.5 V, and draws a current of 1 A per coil. Pololu 2298

Solarbotics GM10 81:1 Geared Pager Motor

Tamiya 72008 4-Speed Worm Gearbox Kit

Miniature high-power motor from the Pololu MP series. Gear motor 250: 1, shaft speed is 90 rpm, torque is 3 kg * cm (0.3 Nm). The motor has an extended shaft which makes it easy to attach the encoder. Pololu 2384

High-Traction Sticky Tire (one tire)

Black polyurethane scooter/skate wheel 100 × 24 mm, works with standard 608 bearings. Pololu 3278

This gearmotor is a miniature high-power, 12 V brushed DC motor with long-life carbon brushes and a 100.37:1 metal gearbox. It has a cross section of 10 × 12 mm, and the D-shaped gearbox output shaft is 9 mm long and 3 mm in diameter. This version also has a 4.5 × 1 mm extended motor shaft.

Key specs at 12 V: 320 RPM and 100 mA with no load, 30 oz-in (2.2 kg-cm) and 0.8 A at stall.

Motor with 25 mm diameter and 58 mm length, 378:1 metal gear, 12 V operating voltage, 0,1 A to 1,1 A power consumption, 14 RPM speed and 23 maximum torque. Pololu 3258

Pololu TReX Dual Motor Controller DMC01

Copper alloy traveling nut intended for use with Tr8×8(P2) threaded rods and features a mounting flange with four holes threaded for M3 screws. Pololu 2688

DRV8825 Stepper Motor Driver Carrier with male header pins installed, so no soldering is required to use it with an appropriate 16-pin socket or solderless breadboard. Pololu 2982

Tiny programmable module featuring Microchip’s PIC18F25K50 microcontroller. It packs a Micro-USB interface and 16 digital input/output pins onto a 1″×0.6″ board and ships preloaded with a USB bootloader, so no external programmer is required. Pololu 3150

The A-Star 32U4 Mini LV is a programmable module based on the ATmega32U4 from Atmel. Unlike competing products, it has an onboard switching step-up/step-down regulator that allows it to be powered efficiently from a 2.7 V to 11.8 V supply. Pololu 3103

The A-Star 32U4 Mini ULV is a programmable module based on the ATmega32U4 from Atmel. Unlike competing products, it has an onboard switching step-up regulator that allows it to be powered efficiently from a 0.5 V to 5.5 V supply. Pololu 3102

Step-Down DC-DC converter module based on the D24V150F12 chip. Input voltage 14.5 ... 40V, output voltage 12V (max 15A). Pololu 2885

This module features a fixed-gain, 38 kHz modulated IR sensor and a corresponding IR LED with oscillator circuit to make a tiny proximity sensor. This low-brightness version draws an average of 8 mA at 5 V and has a typical sensing range up to approximately 12 inches (30 cm).

Orangutan SV-328 Robot Controller

This synchronous switching step-down (or buck) regulator takes an input voltage of up to 38 V and efficiently reduces it to 5 V with an available output current of around 9 A.

The compact (0.4″ × 0.5″) D24V5F15 synchronous buck voltage regulator takes an input voltage of up to 36 V and efficiently reduces it to 15 V while allowing for a maximum output current of 500 mA. Pololu 2847