Step-Up/Step-Down converter with an output voltage of 5 V, an input voltage from 3 to 15 V and a maximum current of up to 600 mA

LED adapters that allow easy control of LEDs (dimming, flickering, pulsing) in Tiny FX based projects. They feature AVX 9276 connectors and built-in 33Ω resistors, eliminating the need for soldering and external components. Compact and durable, they are great for models, LEGO® scenes and light decorations. Pimoroni PIM751

Uninterruptible power supply (UPS) module, allowing continued operation and safe shutdown of the device after a power failure. AC adapter included. Waveshare UPS Module 3S (EU)

Brushless DC motor (BLDC) driver with speed control by potentiometer. It can operate motors powered with a voltage from 7 to 12 V with a current consumption of up to 1.2 A

Power switch that allows for controlled system on and off with simple button presses, with the ability to force shutdown after 10 seconds. It features a durable control circuit, LEDs, a self-resetting fuse, and offers low quiescent current, making it ideal for energy-efficient projects. SparkFun PRT-27081

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

Advanced ESP32-based LED driver board, designed for full compatibility with WLED and xLights. With a wide range of power supply options, ready-made connectors and built-in protection, it is ideal for creating both simple and complex lighting installations, offering convenience and reliability for both amateurs and professionals. Adafruit 6100

Touch keyboard module with 16 buttons based on the TTP229 chip. It is equipped with a connector with derived signals and a power supply diode

Module with the OPTIGA TRUST M SLS32AIA cryptographic chip. Equipped with a STEMMA QT connector, it communicates via the I2C interface. Adafruit 4351

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 4855

An expansion board for the BBC micro:bit, allowing easy connection and control of low-power servos. It supports two servos by default, and up to three by disabling the built-in ZIP LEDs. Powered by three AAA batteries, it simultaneously supplies power to the micro:bit, while a power switch protects against unnecessary discharge. With five RGB ZIP LEDs and the ability to connect additional ones, the board allows for attractive lighting effects and is ideal for robotic projects like the :MOVE mini. Kitronik 5623

A module that provides galvanically isolated, bidirectional I²C communication (SDA and SCL lines), protecting devices from incorrect connections and voltage differences. Thanks to the TI ISO1640B chip, it supports data transfer up to 1.7 MHz. Pololu 5390

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 4875

This board allows for simultaneous control of two motors with full direction and stopping control, ideal for robotic buggies and educational vehicles. It features built-in short circuit, overload, and overheat protection, as well as a stabilized 3V output to power the micro:bit. The Edge Connector and additional pins allow for easy connection of sensors, switches, and accessories, expanding the project\'s functionality. Programming is supported by dedicated MakeCode blocks and support for the Kitronik 5698 Python.

Module with 16 relays with a maximum switching current of 7 A. It communicates via a USB interface. Numato Lab RL160001-24

Bluetooth 4.1 audio receiver with 3.5mm Jack audio output. It allows you to play files via Bluetooth, from a mass memory (flash drive), from a computer via USB or from a microSD card

Audio player and recorder with built-in VS1003 codec, 3.5 mm jack audio output and a microphone

A new version of the popular mono amplifier kit, capable of amplifying audio from any source, such as MP3 players, using the NCP2890 with an output power of up to 1 W. The kit comes pre-assembled, including a jack cable, 8Ω speaker, and a battery holder for two AA batteries, allowing for quick start-up and ideal for portable DIY audio projects. Kitronik 2165B

Versatile USB protocol converter, offering four channels (RS485, RS232, two TTL) and 12V, 5V and 3.3V power supply, ideal for IoT and industrial applications. Compatible with Windows, Linux, LattePanda and Raspberry Pi, no drivers required, and optional installation allows easy device management. DFRobot TEL0185

Module with DC motor driver DRV8256E. It can work with motors supplied with the voltage from 4.5 to 48 V and the current consumption up to 1.9 A. Pololu 4038