Step-Down converter with adjustable output voltage from 4.2 V to 15 V and output voltage up to 45 V. It is equipped with reverse voltage protection, input undervoltage lockout, overload and short circuit protection. Pololu 4874

Step-Up/Step-Down DC-DC converter module. It has an input voltage of 2.8 to 22 V, an output voltage of 12 V and a maximum input of 2.5 A to 3.5 A. Pololu 4984

DC motor controller that allows the movement of three drives to be controlled via an I2C interface. A board with connectors for mounting is included. Pololu 5069

A set of adapters (adapter) from the popular 4 mm to 12 mm motor shaft, wheel holders from RC models. Pololu 2684

Motor with 25 mm diameter and 69 mm length, 99:1 metal gear, 6 V operating voltage, 0,55 A to 6,5 A power consumption, 97 RPM speed, 15 maximum torque and 48 CPR encoder. Pololu 4807

Small, plastic support ball, 3/8" diameter (approx. 9.5 mm). It can be used as a support element in a two-wheeled mobile robot. Pololu 950

A set of two Pololu wheels measuring 40x7mm in black. Fits D-shaped shaft with a diameter of 3mm. Pololu 1452

A set of two Pololu wheels measuring 40x7mm in red. Fits D-shaped shaft with a diameter of 3mm. Pololu 1453

A set of two Pololu wheels measuring 40x7mm in white. Fits D-shaped shaft with a diameter of 3mm. Pololu 1454

This gearmotor is a miniature high-power, 6 V brushed DC motor with a 986.41:1 metal gearbox, making it a great choice for applications requiring fine control at very low speeds. 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.

Pololu Ball Caster with 3/8" Metal Ball

Motor with 37 mm diameter and 65 mm length, 6,3:1 metal gear, 12 V operating voltage, 0,2 A to 5,5 A power consumption, 1600 RPM speed, 3 maximum torque and 64 CPR encoder. Pololu 4757

A4988 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 2981

A4988 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 2980

Module with 3 QTR type optocoupler with analog output. The module operates from 2.9 V to 5.5 V, detects objects at a distance of up to 30 mm. The sensor will be used in projects that require detection of changes in the ground, e.g. in linefollower robots. Pololu 4243

DC-DC Step-Up/Step-Down Converter Module. It has an input voltage of 1.4 to 16 V, an output voltage of 9 V and a maximum output current to 1 A. Pololu 4968

Module with 11 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 40 mm. The sensor will be used in projects that require detection of changes in the ground, e.g. in linefollower robots. Pololu 4111

DC-DC Step-Up/Step-Down Converter Module. It has an input voltage of 1.4 to 16 V, an output voltage of 7.5 V and a maximum output current to 1 A. Pololu 4967

Module with 5 QTR 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 4205

Step-Down Voltage Regulator D24V25F5. Pololu 2850