Shunt regulator with a constant voltage of 13.2V, bypass resistance 1.33 Ohms and a total of 12 SMT shunt resistors on both sides of the PCB with the possibility of adding an external potentiometer to adjust the preset voltage. Pololu 3770

Bipolar stepper motor driver operating at voltages from 8 to 50 V and currents up to 8 A/phase (11 A with cooling). The DRV8711 driver with an SPI interface offers 9 stepping modes (up to 1/256), current configuration, stall detection, and protection against short circuits, overloads, and reverse polarity. Compatible with 1.8–5 V logic, it is ideal for CNC machines, 3D printers, and robotics. Pololu 3731

Module with 8 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 4448

Module with 1 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 4241

A miniature lidar proximity sensor that detects objects up to 15 cm away, regardless of color, transparency, or lighting. It generates a digital signal (0 V on detection), operates in the 3-5.5 V range, draws only 30 mA, and supports sleep mode via the ENABLE pin. Ideal for robotics, automation, and contactless interfaces, it offers a fast response time (142 Hz), switching hysteresis, and a compact housing with an indicator LED. Pololu 5464

Extension board with stepper motor controller based on the STSPIN820 system. Ideally suited for use, among others in 2D / 3D printers, robots, cameras. Pololu 2878

Small size driver module TB67S279FTG stepper motor powered with 10 ... 47V voltage and working current 1.1A. The controller allows you to control the motor movement up to 7 different resolutions (up to 1/32 of a step). Module with soldered connectors. Polol 3099

The basis of the Romi chassis dedicated to the construction of small, two-wheeled mobile robots with two-wheel drive. Pololu 3519

Control board for the Balboa 32U4 robot. It is part of Balboa 32U4 Balancing Robot Kit. Pololu 3576

A circuit board compatible with Arduino Leonardo equipped with Atmega32U4 microcontroller, SD card reader and step-up / step-down converter. Version without soldered through elements. Polol 4006

A circuit board compatible with Arduino with Atmega32U4 microcontroller and step-up / step-down converter. Version without soldered through elements. Polol 4005

A synchronous step-down converter that reduces input voltage from 5V to 60V to a stable 5V with up to 95% efficiency and up to 6A output current. It offers low standby current (<0.2mA), soft-start functionality, overcurrent, thermal, and reverse polarity protection. Compact and easy to integrate, it is ideal for microprocessor systems, IoT, and automation. Pololu 5571

Step-Down converter D36V28F9 with an output voltage of 9 V, an input voltage from 9.8 to 50 V and a maximum output current of 3.4 A. Pololu 3785

Module with 25 QTRX 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 4325

Module with 7 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 4247

A miniature lidar proximity sensor that detects objects ranging from less than 1 mm to 50 cm by generating a PWM signal proportional to distance. It operates in a 3-5.5 V range, draws 30 mA, features an ENABLE pin for sleep mode, and holes for a 2.54 mm connector and an indicator LED. Its color, transparency, and light-sensitive properties make it ideal for robotics, automation, and contactless interfaces. Pololu 5562

Module with 13 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 4113

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 2877

TB67S249FTG Stepper Motor Driver Compact Carrier (Header Pins Soldered)

Motor with 25 mm diameter and 67 mm length, 47:1 metal gear, 12 V operating voltage, 0,3 A to 5,6 A power consumption, 210 RPM speed, 12 maximum torque and 48 CPR encoder. Pololu 4845