Class A power amplifier with one channel (mono) with the power of 10 W. Built on the popular design of J. Hood from 1969

An efficient step-down converter that reduces the input voltage to 5 V at a maximum current of 100 mA, offering high efficiency due to low quiescent current (<20 μA). It supports input voltages from 5 V to 65 V, has short circuit and overheating protection, making it a reliable and energy-efficient solution. Pololu 5363

DC-DC Step-Up converter U3V40F12 with an output voltage of 12 V, an input voltage of 1.3 to 12 V and a maximum output current of 4 A. Pololu 4016

2.4 GHz radio remote control enables precise and convenient lighting control with the ability to adjust the PWM frequency and connect to multiple dimmers

Converter that provides easy communication between the RS232 and RJ45 Ethernet interface. Configurable via web page or AT commands. USR-DR301

An efficient step-down converter that steps down the input voltage from as low as 45 V to a regulated output voltage range of 1.4 to 7 V, offering high efficiency and a maximum continuous current of 3.4 A. It has built-in reverse polarity, overload and short circuit protection, and the spread spectrum function reduces EMI interference. Pololu 4873

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

Step-up DC-DC converter module, 0.9-5V input voltage, 5V output voltage (max. 600 mA) connected to the USB socket. There is a diode on the board indicating the power connection. modPS

Module with the driver of motors TB6612FNG and driver PWM PCA9685 for Raspberry Pi Pico. It allows you to control the movement of 4 DC motors. Waveshare Pico-Motor-Driver

Compact ESP32 based board designed for lighting and WLED projects, offering WiFi, Bluetooth and efficient power supply via USB Type-C (up to 4A). It offers two LED outputs with logic level conversion, a built-in I2S microphone, STEMMA QT port, button, NeoPixel and additional GPIO pins. With support for multiple platforms (Arduino, MicroPython, CircuitPython, ESP-IDF), it is ideal for wearable devices and interactive projects. Adafruit 6160

A compact board with eight 12-bit DACs that allow precise voltage control on each output via I2C communication. Compatible with 3.3V or 5V, it offers flexibility with a reference voltage setting and STEMMA QT or Qwiic connectors for easy integration with other I2C devices. Adafruit 6223

16-channel GPIO expander with an I2C interface microcontroller can interface with 16 fully configurable digital input/output pins. It can produce PWM signals, so you can dim LEDs. It can be set to blink or even breathe pins at varying rates. With a built-in keypad engine, it can interface with up to 64 buttons set up in an 8x8 matrix. BOB-13601

High-quality digital-to-analog converter that allows for pure stereo audio playback without the need for I2C configuration or the MCLK pin. It supports I2S signals (BCLK, WSEL, DIN) and audio formats up to 32 bits and 384 kHz, providing an excellent signal-to-noise ratio (110 dB). Audio output is available via a 3.5 mm jack or on-board pads, and the module works best as a line output to amplifiers and audio systems. Adafruit 6251

Module with a button, LED diode and a red cap. DFRobot DFR0029-R

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

This compact board breaks out the pins of a microSD card connector necessary to interface with the card through SPI (Serial Peripheral Interface), and it can be directly integrated into 5 V systems thanks to its on board 3.3 V regulator and level shifting circuity. Pololu 2587

Finger Vein Scanner Module (A) is an advanced biometric module for finger vein identification, offering a high level of security, low power consumption, and resistance to harsh environmental conditions. Its fully integrated design and support for standard communication protocols facilitate its use in smart locks, access control systems, and embedded devices, especially in applications requiring reliable user authentication without contact with the skin surface.

The lead module for the ATX power supply has 24 pins, a switch and 4 voltage modes, providing flexibility in device testing. Its compact dimensions of 12.8 cm x 4.8 cm and built-in fuses guarantee easy installation and safe use.

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

The Step-Up converter module with a power of 65W converts the voltage in the range of 3-35V to 3.5-35V with an efficiency of over 96%. Equipped with a voltmeter, it operates in temperatures from -40°C to 85°C.