Stepper motor driver that can work with a voltage in the range from 20 to 50 V and a maximum current of 4.2 A. It allows you to configure the microstep in the range from 2 to 128. DM542

Double-sided universal board with dimensions 180x300 mm with 7280 tin-plated holes. Made of FR-4 laminate with a thickness of 1.6 mm. Ideal for creating electrical, electronic and prototyping systems using THT components

SMD connector, 30pin bottom contact, 0.5mm pitch

The Sunon A2123-HST.(7).GN axial AC fan, measuring 120 x 120 x 38 mm, provides efficient cooling at 230 V. Equipped with a sleeve bearing, connection terminals, and compliant with UL94V-0 flammability standards, it is designed for industrial and electronic applications.

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

A module for the detection of gases and vapors of alcohols, including ethanol.

8x8 matrix or a 4-digit 7-segment display. Matrices like these are \'multiplexed\' - so to control all the seven-segment LEDs you need 14 pins. Adafruit 879

Step-Up/Step-Down converter module based on the S13V20F5 system. It has an input voltage from 2.8 to 22 V and an output voltage of 5 V. The current efficiency of the converter is up to 2,5 A. Pololu 4085

8-channel module with relays, designed to work with the Raspberry Pi. It can switch 250VAC/7A or 30VDC/10A signals. SB Components 21871

Advanced expansion shield for Arduino. Supports SIM cards as well as NB-IoT / CAT-M cards. With the integrated GNSS (Global Navigation Satellite System) module, it supports GPS, GLONASS, Galileo and BeiDou navigation systems. The module is powered with a voltage from 7 V to 12 V. DFRobot DFR0572

E-Ink display module (ePaper) with a diagonal of 2.9 "and a resolution of 296 x 128 pixels with a SPI controller.   Waveshare 12956

A compact Hall-effect current sensor that provides accurate DC and AC current measurement within a ±10 A range with galvanic isolation. It features a high-sensitivity analog VOUT output with a 150 kHz bandwidth, enabling fast and precise readings in dynamic systems. The module operates over a wide temperature range of -40°C to 125°C, and the low current path resistance minimizes energy loss. Its small size and flexible mounting options make it ideal for prototyping, industrial systems, and space-constrained projects. Pololu 5446

The USB Step-Up converter module in the housing allows you to adjust the voltage in the range of 3.5-15V to 0.5-30V, with a maximum current of 2A and a power of 15W. The device is characterized by high precision, voltage resolution 0.01V, current resolution 0.001A, voltage accuracy 0.3% and current accuracy 0.5%, and can operate in temperatures from -40°C to 85°C. XY-UDP

Module with environmental sensors for Raspberry Pi Pico. It allows you to measure temperature, humidity, air quality pressure and color detection. SB Components 22366

Module with a round 1.28" IPS LCD display and a resolution of 240x240 px. Communication is via the SPI interface. SB Components 21697

32-bit microcontroller with ARM Cortex-M4 core MCU + FPU, Ultra-low-power, 2MB Flash memory, 640KB SRAM memory, LCD-TFT & MIPI DSI, LQFP144, STM

Grove - ORP Sensor Kit Pro is an advanced liquid ORP measurement kit that measures water quality from -2000 mV to +2000 mV. With a 5-meter IP68 probe and compatibility with Arduino and XIAO, it is ideal for monitoring aquatic environments, wastewater treatment and aquaculture.

Step-Up/Step-Down converter module based on the S13V10F5 system. It has an input voltage from 2.8 to 22 V and an output voltage of 5 V. The current efficiency of the converter is up to 1 A. Pololu 4083

LED strip with addressable RGB WS2813 diodes on a white PCB. It is powered by 5 V DC, has a length of 1 m and 60 LEDs/m. Protection level IP30