The module with the HC-05 transceiver makes it easy to add Bluetooth communication to an existing project. The system is controlled by exchanging AT commands (UART bus). FC-114

Step-Down converter D36V50F3 with an output voltage of 3.3 V, an input voltage from 4.5 to 50 V and a maximum output current of 9.5 A. Pololu 4090

TB6612FNG dual DC motor controller module. It can be used as a stepper motor driver or solenoid driver. Adafruit 2448

7-color display ACeP e-Paper with a diagonal of 4.01" and a resolution of 640x400 px. Communicates via the SPI interface. Without a PCB. Waveshare 4.01inch e-Paper (F)

Mini MP3 player with microSD card support. It can work as a separate device and play sounds from the card or be controlled via the UART serial interface. DFRobot DFR0299

A module with six GNSS antennas designed to test various solutions within the framework of GPS, GLONASS, Galileo or BeiDou geolocation systems. SparkFun GPS-15247

Module with 9 QTRX type optocoupler with RC (digital) output. The module operates from 2.9 V to 5.5 V, detects objects at a distance of up to 40 mm. The sensor will be used in projects that require detection of changes in the ground, e.g. in linefollower robots. Pololu 4309

Module with 9 QTR type optocoupler with analog output. The module operates from 2.9 V to 5.5 V, detects objects at a distance of up to 40 mm. The sensor will be used in projects that require detection of changes in the ground, e.g. in linefollower robots. Pololu 4209

The 8.8" DSI display with a resolution of 480×1920 and IPS technology offers high image quality in a compact panoramic format. With 10-point touch, tempered glass, and integration via DSI/I2C, it is ideal for user interfaces, information terminals, and IoT applications with Raspberry Pi.

Module with gas sensor designed to monitor indoor air quality. It was based on the AMS CCS811 system that allows the detection of volatile organic compounds (VOCs) in the air. Digilent 410-386

Module with black and white e-Paper display, 5.83" diagonal and 648x480 px resolution. Communication via SPI interface. Waveshare Pico-ePaper-5.83

LCD display 2x16, 80x36mm, FSTN Positive, RGB LED backlight, extended temperature range, RoHS

Module with a 3-axis magnetometer HMC5883L, which allows the measurement of the magnetic field in the range of ±8 Gauss. Communication via the I2C interface

This compact expansion board plugs directly into the GPIO header on a Raspberry Pi B+, A+, or Pi 2 and provides an easy and low-cost solution for driving a pair of small brushed DC motors. Pololu 2753

The module with a heart rate sensor and the SpO2 level dedicated to micro:bit. It is based on the MAX30102 chip and communicates via the I2C interface. SparkFun SEN-15271

The UART-USB converter built on the FTDI FT232RL chip. Compatible with 3.3V and 5V voltages. DFRobot DFR0065

The LANBERG cat.6 FTP Ethernet cable with a length of 30 meters provides a fast and stable connection with a throughput of up to 1 Gb/s, ideal for LAN networks. Thanks to the shielding, FTP effectively protects against electromagnetic interference, and FLUKE tests confirm its high quality and reliability.

Unshielded UTP category 6 Ethernet network cable with RJ45 plugs. Lanberg PCU6-10CC-1000-G

Step-Down converter D36V28F3 with an output voltage of 3.3 V, an input voltage from 4.5 to 50 V and a maximum output current of 4.5 A. Pololu 3781