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 4854

The Sunon PF38281B1-000U-S99 is a high-performance, compact 12 V DC axial fan with PWM control, speed detection, and auto-restart. Designed for demanding cooling applications in electronics and automation, it offers reliable operation and meets stringent material safety standards.

Module with a 3-axis BMA400 accelerometer with a measuring range up to ± 16g. The board is equipped with a Grove connector and communicates via the I2C interface. Seeed Studio 101020582

WiFi/BLE module that supports both the 2.4 GHz and 5 GHz WiFi bands, as well as Bluetooth Low Energy (BLE 4.2) communication. It has a u.FL connector dedicated to connecting an external antenna and a connector with a 2.54 mm pitch, which greatly facilitates prototyping. Tibbo WA2000U

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 4874

Module with light sensor - LS06-S phototransistor. The board is equipped with a Grove connector and has an analog output. Seeed Studio 101020132

Comprehensive development platform for Espressif ESP32 a WiFi-compatible microcontroller and nearly 30 I/O pins. DEV-13907

UART-RS485 converter module. The board was equipped with a Grove connector. Seeed Studio 103020193

Module with a button, LED diode and a blue cap. DFRobot DFR0029-B

Module with BME680 sensor for measuring the concentration of volatile organic compounds (VOC), pressure, temperature and humidity. I2C or SPI communication. DFRobot SEN0375

4G/3G/2G communication and GNSS positioning module. It allows you to make phone calls, support SMS, MMS, e-mail, TCP, UDP, DTMF, HTTP, FTP and has support for GPS, BeiDou, Glonass, LBS. Waveshare SIM7600G-H 4G for Jetson Nano

Cable USB Akyga AK-USB-38 USB type C (m) / USB type C (m) ver. 2.0 100W 1.8m. Akyga AK-USB-38

HDMI (M) - HDMI (M) cable 1.5 m long for digital audio and video data transmission. Compatible with HDMI versions 1.4, 1.4a, 1.3 (High Speed Ethernet).

3-color e-Paper display with a diagonal of 7.5" and a resolution of 800×480 px. SPI interface. Without PCB. Waveshare 7.5inch e-Paper (B) v2

LCD TFT 5" display with touch screen. The display is equipped with an HDMI interface and USB for touch screen. Resolution 800x480 pixels. Waveshare 5inch HDMI LCD (H) V4

L76B based GNSS module that can work with GPS, BDS and QZSS systems. Communication via the UART interface. Waveshare Pico-GPS-L76B

Low power Wi-Fi module integrating wireless LAN and Cortex-M4 STM32F411CE microcontroller. It has 2 MB external flash memory, 512 KB bytes embedded flash memory, 128 KB RAM and peripherals. Seeed Studio 113990108

Finder 95.P5SPA is a high-quality base for mounting 55 and 85 series relays, enabling easy mounting on a 35 mm DIN rail. Equipped with terminal screws, it provides a secure electrical connection, and its solid construction made of durable plastic ensures long-term operation in difficult conditions.

The Adafruit CH9328 UART to HID Keyboard Breakout allows for easy and fast emulation of a HID keyboard without the need for a microcontroller with native USB. The module is used in prototyping projects, automation, integration with single-board computers and in testing devices where keyboard signals are required. Thanks to support for various transmission modes and simplicity of integration, it is a practical tool for electronics engineers and embedded system programmers. Adafruit 5973