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This small synchronous switching step-down (or buck) regulator takes an input voltage of up to 38 V and efficiently reduces it to 7.5 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.

A set of adapters (adapter) from the popular 4 mm to 12 mm motor shaft, wheel holders from RC models. Pololu 2684

Module with EEPROM 24LC32 memory with a capacity of 32 kBit (4 kB). Equipped with a STEMMA QT connector, it communicates via the I2C interface. Adafruit 5146

ZR300.367.134 RAW - Aluminium enclosure zr11.81"14.45"5.28"

RGB LED strip driver module dedicated to Arduino boards. It can work with tapes with a supply voltage of up to 12 V and a current consumption of up to 3 A. DFRobot DFR0274

A compact sound module that lets you quickly add tones and acoustic effects to your electronics projects. Based on the PKLCS1212E4001-R1 ​​buzzer and an STM32C011 microcontroller, it communicates via I2C/QWIIC, ensuring easy integration with Arduino and MicroPython. Support for the Arduino Cloud and a dedicated library make the module suitable for both beginners and advanced makers. Arduino ABX00108

Development board equipped with ATSAMD21G18 microcontroller. It has 30 I/O lines, including SERCOM interfaces and 14 analog inputs. Compatible with Arduino. SparkFun DEV-13672

The B-L475E-IOT01A Discovery kit for IoT node allows users to develop applications with direct connection to cloud servers. The Discovery kit enables a wide diversity of applications by exploiting low-power communication, multiway sensing and Arm^® Cortex^® -M4 core-based STM32L4 Series features

Module with a button and yellow LED backlight. The board is equipped with a Gravity connector and communicates via a digital interface. DFRobot DFR0785-Y

Finder 36.11.9.003.4011 is a 3 V DC powered miniature SPDT relay, ideal for automation and control applications. It handles up to 10 A at 250 VAC, making it suitable for medium duty electrical applications.

Ethernet network module with W5500 chip and PoE (Power over Ethernet) function. It communicates via the SPI interface, it has a built-in TCP/IP stack. DFRobot DFR0850

ZP60.40.30SJp-IP67 TM ABS-PC - Hermetic enclosure ZP60.40.30 with a light-colored base, a transparent top with a poured gasket, and brass inserts, made of ABS-PC.

Wireless switch operating at 433 MHz frequency. It does not require a power supply. DFRobot TEL0146

Pololu 5652 is an adapter that allows connection of 3-wire JST PH and SH connectors to circuits with 2.54 mm pin headers. Applications include sensors, communication modules, and servo systems. The adapter is a convenient tool for quick integration of wires with prototyping boards.

The Finder 46.61.9.012.0040 relay is a powerful SPDT relay, designed to operate with a 12VDC coil, supporting a current of up to 16A at a voltage of 250VAC. Its robust construction and resistance to voltages up to 6kV make it perfect for demanding working conditions, ideal for industrial control and automation systems.

e-Paper display with a diagonal of 13.3" and a resolution of 960x680 pixels. Communicates via the SPI interface. Waveshare 13.3inch e-Paper (K)

Module with waterproof barometer LPS33HW. It enables pressure measurement in the range from 260 to 1260 hPa and communicates via I2C or SPI. Adafruit 4414

Kit for tracks drive construction. It consists of silicone tracks and plastic gears and a set of screws. Pololu 3031

The Uni-T UT353 is a compact sound level meter measuring sound levels from 30 dB to 130 dB, ideal for precise noise monitoring in various environments. Equipped with a clear LCD display and a memory function, it provides convenience of use thanks to its lightweight design and automatic shutdown.

The module with the AR0234 sensor, working with all versions of the Raspberry Pi. The sensor used has a matrix of 2.3 MP and allows you to record video at resolutions 1920x1200 @ 60fps. ArduCAM B0353