Micro:Mate is an expansion board for the micro: bit development module. It provides six 3-pin connectors with I/O outputs, a 3.5mm audio jack connector and is powered from a 5V microUSB connector. DFRobot DFR0518

The compact MIDI synthesizer based on the XIAO ESP32-C3 and SAM2695 chip is a portable sound studio that lets you create music anywhere. With a built-in speaker, hundreds of instrument presets and support for up to 64-voice polyphony, it offers rich sounds and three modes: test, metronome and multitrack. With its open source, ease of use and pocket-sized format, it is the perfect tool for musicians, hobbyists and DIY creators. Seeed Studio 107990333

Programmable time module with relay, allows you to set the time and manner of relay reaction on the trigger signal, has a built-in LED display. It can be supplied with voltage from the range of 6 - 30VDC or using the microUSB connector

DC motor driver with voltage 6.5..40V and maximum continuous current 21A. It has the ability to easily implement the feedback loop and numerous control interfaces. Polol 3149

The Tic T834 USB Multi-Interface Stepper Motor Controller makes basic control of a stepper motor easy, with quick configuration over USB using our free software. The controller supports six control interfaces: USB, TTL serial, I²C, analog voltage (potentiometer), quadrature encoder, and hobby radio control (RC).

This small synchronous switching step-down (or buck) regulator takes an input voltage of up to 38 V and efficiently reduces it to 6 V. The board measures only 0.7″ × 0.7″, but it allows a typical continuous output current of up to 2.5 A. Typical efficiencies of 85% to 95% make this regulator well suited for powering moderate loads like sensors or small motors.

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

Gravity: Digital 10A Relay Module is a module with 10A 35VAC / 30VDC relay compatible with devices with control signals in the range of 2.8 ... 5.5V. DFRobot DFR0473

Powerful DC motor driver. It allows you to control a motor with a power supply voltage in the range of 6 ... 28 V, the motor can draw current of 100 A (using a heat sink). For the control PWM modeling (eg from RC receivers) is used in robotics, small electric vehicles or wherever there is a need to control a DC motor. Digilent 410-334-1

An H-bridge capable of controlling one DC motor in both directions or two unidirectional motors at voltages from 4.5 to 44 V and continuous current up to 1.1 A. The module offers three operating modes (PH/EN, IN/IN, half-bridge), built-in current limiting and measurement, and protection against overheating, overload, undervoltage, and reverse polarity. Its compact design, flexible logic power supply (1.8–5.5 V), and simple control make it ideal for robotics, automation, and hobby projects. Pololu 4972

A USB-to-I2C adapter that allows a computer to act as an I2C bus controller, supporting speeds over 1 MHz, clock stretching, and bidirectional communication. The device offers full galvanic isolation between USB and I2C, protecting the computer from damage and interference, and provides an isolated 3.3V or 5V voltage, eliminating the need for an external I2C power supply. With JST SH and goldpin connectors, USB-C support, a virtual serial port, and a Python library, the adapter is a versatile tool for working with I2C devices in both hobbyist and professional projects. Pololu 5397

This miniature IEEE802.3af-compliant PoE module provides 5V power to devices at up to 8W without the need for a separate power cable. It supports both end-span and mid-span modes, offering high efficiency, electrical isolation, and easy integration into IoT and embedded systems. WIZnet WIZPoE-P1

The Tic T825 USB Multi-Interface Stepper Motor Controller makes basic control of a stepper motor easy, with quick configuration over USB using our free software. The controller supports six control interfaces: USB, TTL serial, I²C, analog voltage (potentiometer), quadrature encoder, and hobby radio control (RC). 

This L298N module allows independent control of two DC motors or one stepper motor, ideal for robotics and DIY projects. It supports power supplies from 7V to 35V and has a built-in 5V regulator that can power additional circuits. Control is performed via the ENA, ENB, and IN1–IN4 pins, allowing for adjustable rotational direction and speed. The module is equipped with protection diodes and filter capacitors for stable and reliable operation.

This ideal diode module allows for safe connection of two power supplies to a common output point, preventing reverse current flow. Built-in 20mΩ resistors allow for simple voltage compensation and load balancing between the power supplies. The board offers flexible input and output connectors, facilitating integration into industrial and hobby systems requiring high power reliability. Pololu 5398

This SPST solid-state relay module allows for safe switching of DC circuits up to 60 V and 7 A, offering galvanic isolation and low conduction resistance (approx. 30 mΩ) thanks to the use of back-to-back MOSFET transistors. It features fast switching time (up to 1 ms), low control current consumption (approx. 10 mA), and the ability to control a signal from 2.7 to 40 V. Its compact design, lack of mechanical components, and the ability to mount on 2.54 mm connectors or screw terminals make the module a durable and quiet solution for systems requiring reliable isolation and long service life. Pololu 5420

The module with the four-bit logic translator TXB0104, can work in both directions. Connections using standard goldpin connectors with 2.54 mm pitch. It is compatible with BOB-11771

This SPST solid-state relay module allows for safe switching of DC circuits up to 30 V and 11 A, offering galvanic isolation and low conduction resistance (approx. 30 mΩ) thanks to the use of back-to-back MOSFET transistors. It features fast switching time (up to 1 ms), low control current consumption (approx. 10 mA), and the ability to control a signal from 2.7 to 40 V. Its compact design, lack of mechanical components, and the ability to mount on 2.54 mm connectors or screw terminals make the module a durable and quiet solution for systems requiring reliable insulation and long service life. Pololu 5421

The Pico-DALI2 module enables the implementation of DALI2 communication in projects based on ESP32-C6-Pico and ESP32-S3-Pico boards. Thanks to its compatibility with the Pico interface, DALI screw terminals, and ready-to-use programming examples, it is well-suited for smart lighting and building automation applications.