A two-channel DC motor controller with a UART TTL interface. It is powered from 1.8 V to 22 V and can deliver up to 1.6 A per motor. Board with connectors for assembly. Pololu 5081

Module with 25 QTR type optocoupler with RC (digital) output. The module operates from 2.9 V to 5.5 V, detects objects at a distance of up to 50 mm. The sensor will be used in projects that require detection of changes in the ground, e.g. in linefollower robots. Pololu 4125

These 20 mm long aluminum adapters convert a 6 mm diameter shaft to a 12 mm hex shaft that is compatible with many common hobby RC wheels. Pololu 2686

Module with 7 QTRX type optocoupler with analog output. The module operates from 2.9 V to 5.5 V, detects objects at a distance of up to 40 mm. The sensor will be used in projects that require detection of changes in the ground, e.g. in linefollower robots. Pololu 4447

These tall brackets offer an easy and  convenient mounting solution for mini plastic gearmotors.

This BLDC motor controller, based on the Allegro A89301 chip, enables sensorless control over a wide voltage range from 5.5 V to 48 V and phase current up to 11 A without additional cooling. It supports four control modes: analog voltage, PWM signal, pulse frequency, and via an I²C interface with the ability to configure parameters and save settings to EEPROM. The Field-Oriented Control (FOC) algorithm ensures quiet and efficient operation, while built-in protection protects the system against short circuits, reverse polarity, and undervoltage. Pololu 5357

This gearmotor is a miniature high-power, 6 V brushed DC motor with long-life carbon brushes and a 4.995:1 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.

Step-Up DC-DC converter module. It has an input voltage of 1.3 to 16 V, an output voltage of 5 V and a maximum input of up to 2 A. Pololu 4941

The core of a small robot, either as an auxiliary controller atop a Raspberry Pi base or as a complete control solution on its own. Its Atmel ATmega32U4 microcontroller comes preloaded with an Arduino-compatible bootloader. This version does not include any through-hole components or connectors, allowing for customized assembly or standalone use. Pololu 3118

A stepper motor driver for precise control of bipolar motors, offering six microstepping modes (from full to 1/32). It operates within a voltage range of 8.2V to 44V and delivers up to 1.5A per phase without cooling or up to 2.2A with a heatsink/fan, ensuring smooth and stable operation even at high speeds. Compatible with the popular A4988 and DRV8825 drivers, with an integrated regulator and overheating, overload, and short circuit protection, the TB67S581FNG is a reliable and versatile solution for applications requiring precise motion control. Pololu 2989

A stepper motor driver for precise control of bipolar motors, offering six microstepping modes (from full to 1/32). It operates within a voltage range of 8.2V to 44V and delivers up to 1.5A per phase without cooling or up to 2.2A with a heatsink/fan, ensuring smooth and stable operation even at high speeds. Compatible with the popular A4988 and DRV8825 drivers, with an integrated regulator and overheating, overload, and short circuit protection, the TB67S581FNG is a reliable and versatile solution for applications requiring precise motion control. Pololu 2988

This set of two quadrature encoders for 20D extended-shaft motors provides precise rotational speed monitoring with 20 pulses per motor revolution. The devices utilize magnetic disc and Hall-effect sensors operating from 2.7-18V, and the digital outputs can be connected directly to a microcontroller. The encoders mount directly to the back of the motor, and the compact design and 6-pin JST PH connectors facilitate integration into robotic projects and control systems. Pololu 5661

Motor with 20 mm diameter and 46 mm length, 488:1 metal gear, 12 V operating voltage, 0.08 A to 1.6 A power consumption, 28 RPM speed and 25 kg*cm maximum torque. Pololu 3497

Motor with 20 mm diameter and 44 mm length, 100:1 metal gear, 6 V operating voltage, 0.15 A to 2.9 A power consumption, 140 RPM speed and 5.4 kg*cm maximum torque. Pololu 3454

Motor with 20 mm diameter and 44 mm length, 156:1 metal gear, 6 V operating voltage, 0.15 A to 2.9 A power consumption, 91 RPM speed and 7.9 kg*cm maximum torque. Pololu 3718

STSPIN220 stepper motor driver module with a low voltage range of 1.8 ... 10V and 1.1A working current. The controller allows you to control the motor motion up to 9 different resolutions (up to 1/256 steps). Pololu 2876

Motor with 25 mm diameter and 67 mm length, 47:1 metal gear, 6 V operating voltage, 0,55 A to 6,5 A power consumption, 200 RPM speed, 8,5 maximum torque and 48 CPR encoder. Pololu 4805

DC-DC Step-Down converter module. It has an input voltage from 5 to 45 V, an output voltage of 5 V and a maximum output current of up to 3.4 A. Pololu 4892

A set of two 80x10mm yellow Pololu wheels. Fits D-shaped shaft with a diameter of 3mm. Pololu 1432

A pair of 32.5 x 6.6mm silicone tires compatible with Pololu 40x7mm wheels. Pololu 3408