An educational kit that teaches the basics of electronics with an LED that changes colors in response to the lack of light. The kit includes all the necessary components, including a light sensor, a color LED, and a USB cable, and detailed instructions and teaching materials from Kitronik make assembly and introducing the topic of electronics into teaching easy. Kitronik 2184

Bluetooth stereo amplifier module that allows you to play music wirelessly from phones, tablets or computers. It automatically enters pairing mode after the first power supply and then connects to the last paired device, making it easy to use. The set includes 3W speakers with practical JST connectors, and the board is equipped with an integrated LiPo battery charging system, which allows powering from various sources, such as USB-C or battery. Kitronik 2182

A compact biometric module with a capacitive touch sensor and a built-in fingerprint recognition algorithm. It enables fast fingerprint matching in less than 0.5 seconds and stores up to 1,000 patterns. It supports UART and USB communication, making it easy to integrate with computers and microcontrollers. Waveshare UART Fingerprint Sensor (F)

A switching converter that regulates 24V voltage from an input range of 2.6V to 20V. It offers high efficiency of 70-95% and the ability to operate with a continuous input current of up to 900mA and a peak current limit of 2.2A. With a switching frequency of 1.6MHz and a power-saving mode, it is suitable for both high-performance and low-power applications. Pololu 5588

Gravity: I2C ADS1115 The 16-Bit ADC Module is an analogue-to-digital converter module for Arduino and Raspberry Pi. This module uses 16-bit ADC ADS1115 and is powered by 3.3 ... 5V. DFRobot DFR0553

A step-down converter module that allows you to reduce the input voltage from 12.2–36 V to a stable 12 V, ensuring high efficiency thanks to SMPS technology. A maximum output current of 600 mA allows you to power microcontrollers, IoT modules, and other electronic systems. The device is equipped with short circuit and overheating protection and offers very low quiescent current. Pololu 5597

A switching converter that regulates 12V voltage from an input range of 2.6V to 20V. It offers high efficiency of 70-95% and the ability to operate with a continuous input current of up to 900mA and a peak current limit of 2.2A. With a switching frequency of 1.6MHz and a power-saving mode, it is suitable for both high-performance and low-power applications. Pololu 5585

Module with EEPROM memory, capacity 512 kbit (64kB). Communication takes place via the I2C interface. The module has 3 jumpers that enable selection of one of 8 addresses. SparkFun SPX-14764

Power switch that allows you to control your system\'s power 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-26993

A switching converter that stabilizes a 5V input voltage from 2.6V to 20V. It offers high efficiency of 70-95% and the ability to operate with a continuous input current of up to 900mA and a peak current limit of 2.2A. With a switching frequency of 1.6MHz and a power-saving mode, it is suitable for both high-performance and low-power applications. Pololu 5581

Compact module that allows easy changing of I2C sensor addresses, allowing coexistence of multiple devices with the same address on one bus. With DIP switches and optional soldering resistors, users can easily configure sensor addresses without having to modify the code or use external components. DFRobot DFR1185

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

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 currents up to 1.3 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 4971

BMS protection circuit designed for 5 Li-Ion cells. It has a charging function with balancer option, a discharging function and an over-discharge protection function. HXYP-C47-MA18-5S

Module with analog output 0-20 mA or 4-20 mA. It communicates via the RS485 interface and supports the Modbus RTU protocol. The board is enclosed in an industrial housing. Wellpro WP3076ADAM

The Step-Down panel-mounted converter module enables precise regulation of input voltage (6V-70V) and output current (0-5A), with a maximum output power of 300W, conversion efficiency up to 95%, and short-circuit and anti-reverse connection protection. The device, with dimensions of 120mm x 64mm x 72mm, is equipped with continuous regulation functions, with a resolution of 0.01V for voltage and 0.001A for current, and operates in a temperature range of -10 to +75 degrees Celsius.

The audio level indicator module with screw connection is a versatile device that makes monitoring audio levels much easier while being easy to install and use.

4-channel PCIe port expander. It can be powered with 12 V via a PCIe connector or an external DC connector. Waveshare PCIe-Packet-Switch-4P

The module with the relay is designed for the M5Stack sets. It allows you to control devices with a working voltage of up to 220 V AC and a current of up to 3 A or a voltage of 30 V DC and an intensity of 3 A. M5Stack U023