A module that provides galvanically isolated, bidirectional I²C communication and isolated power supply, protecting devices from misconnections and voltage differences. Thanks to the TI ISO1640B device, it supports data transfer up to 1.7 MHz, and the power supply isolation via MPS MIE1W0505BGLVH eliminates ground loops and interference. Pololu 5392

Efficient step-down converter that reduces the input voltage from up to 45 V to a regulated output voltage range from 1.4 to 7 V, offering high efficiency and a maximum continuous current of 3.4 A. It has built-in protection against reverse polarity, overload and short circuit, and the spread spectrum function reduces EMI interference. The module is equipped with an additional potentiometer for adjusting the cut-off voltage. Pololu 4872

A set of adapters (adapter) from the motor shaft 6 mm to 12 mm, wheel holders from RC models. Pololu 2687

Pololu 2467

Compact current measurement module using the Allegro ACS37100LMATR-050B3 TMR sensor with a galvanically isolated current path. It enables bidirectional current measurement in the ±50 A range, offering measurement bandwidth up to 10 MHz and a short response time of approximately 50 ns. Pololu 5477

15:1 Micro Metal Gearmotor. Pololu 4780

Step-Down converter D36V28F7 with an output voltage of 7.5 V, an input voltage from 8 to 50 V and a maximum output current of 3.7 A. Pololu 3784

This gearmotor is a miniature high-power, 6 V brushed DC motor with a 150.58:1 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-down voltage regulator module based on the APM81815 providing a fixed 12 V output at up to 0.8 A with an input voltage range of 12.1 - 72 V. Pololu 5269

The Pololu 5318 current sensor provides electrically isolated unidirectional AC and DC current measurement from 0 A to 50 A. Based on the Allegro CT433-HSWF50DR with TMR technology, the module offers up to 1 MHz bandwidth and an analog interface. Pololu 5318

15:1 Micro Metal Gearmotor HP with Extended Motor Shaft

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.

A compact Hall-effect current sensor that provides accurate DC and AC current measurement within a ±30 A range with galvanic isolation. It features an analog VOUT output with a sensitivity of 66.7 mV/A and a 150 kHz bandwidth, enabling fast and precise readings in dynamic systems. The module operates over a wide temperature range of -40°C to 125°C, and the low current path resistance (~1.6 mΩ) minimizes energy loss. Its small size and flexible mounting options make it ideal for prototyping, industrial systems, and space-constrained projects. Pololu 5443

These wide brackets offer an easy and convenient mounting solution for mini plastic gearmotors. The white plastic bracket clasps securely around the gearmotor, and the mounting tabs capture the nuts for easy installation. These brackets are sold in pairs, and each bracket comes with two M3 screws, two nuts, and a spacer.

Programmable radio module operating at 2.4 GHz. It is based on the CC2511F32 microcontroller. The board has analog outputs, PWM, USART and SPI interfaces and a USB connector. Pololu 1337

Force-Sensing Resistor - 0.5" Circle

Module with 1 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 30 mm. The sensor will be used in projects that require detection of changes in the ground, e.g. in linefollower robots. Pololu 4401

Snap-Action Switch with 16.3mm Roller Lever: 3-Pin, SPDT, 5A

Pololu Universal Aluminum Mounting Hub for 6mm Shaft, M3 Holes (2-Pack)

DRV8711 stepper motor driver module powered by 8-50V voltage and 4A operating current. The controller allows you to control the movement of the engine with up to 9 different resolutions. Configuration via SPI interface. Pololu 3730