This SPST solid-state relay module allows for safe switching of DC circuits up to 60 V and 7 A, offering galvanic isolation and low conduction resistance (approx. 30 mΩ) thanks to the use of back-to-back MOSFET transistors. It features fast switching time (up to 1 ms), low control current consumption (approx. 10 mA), and the ability to control a signal from 2.7 to 40 V. Its compact design, lack of mechanical components, and the ability to mount on 2.54 mm connectors or screw terminals make the module a durable and quiet solution for systems requiring reliable isolation and long service life. Pololu 5420

Pololu 2833

The Sunon EEC0251B2-000U-A99 12 V DC fan delivers effective and quiet cooling in a standard 120 mm frame. With auto-restart, a brushless motor, and ball bearings, it is well-suited for electronic equipment, automation systems, and applications with strict fire safety requirements.

A single-channel IoT gateway operating in the 868 MHz band, designed for building and testing long-range LoRaWAN networks. Based on the ESP32 WROOM-32 microcontroller, the device offers WiFi and Ethernet connectivity and works with the RA-01H radio module, providing communication distances of up to approximately 1.5 km outdoors. The gateway supports the LoRaWAN 1.0.3 standard and is compatible with The Things Network platform, enabling easy cloud integration. It features a built-in color TFT display, USB-C power supply, and an acrylic enclosure.

Module with 1 QTRX type optocoupler with analog output. The module operates from 2.9 V to 5.5 V, detects objects at a distance of up to 30 mm. The sensor will be used in projects that require detection of changes in the ground, e.g. in linefollower robots. Pololu 4401

HDMI cable compliant with the HDMI Premium High Speed with Ethernet specification, allows you transmit a 4k resolution image at 60 Hz, 1 m cable length. Lanberg CA-HDMI-20CU-0010-BK

Module with 1 QTRX type optocoupler with analog output. The module operates from 2.9 V to 5.5 V, detects objects at a distance of up to 30 mm. The sensor will be used in projects that require detection of changes in the ground, e.g. in linefollower robots. Pololu 4441

A compact Hall-effect current sensor that provides accurate DC and AC current measurement within a ±30 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 its low current path resistance (~1.6 mΩ) minimizes energy loss. Its small size and flexible mounting options make it ideal for prototyping, industrial systems, and space-constrained projects. Pololu 5451

HDMI cable compliant with the HDMI High Speed with Ethernet specification, allows you transmit a 4k resolution image at 30 Hz, 3 m cable length. LANBERG

SIM7000E NB-IoT HAT is a module that extends the capabilities of Raspberry Pi for communication via GSM / GPRS cellular networks based on Simcom Sim7000E. It has support for NB-IoT, eMTC, EDGE, GPRS and GNSS. Waveshare SIM7000E NB-IoT HAT

The DFRobot Vibration Sensor buffers a piezoelectric transducer that responds to strain changes by generating a measurable output voltage change which is propotional with the strength of vibration. DFR0052

Module with three Hall sensors A3144E, which react to the failure of the magnet. It is powered with 5 V and has a digital output on the Grove connector. M5Stack U084

A touchscreen display with an embedded ESP32-S3-WROOM-1-N4R8 module, combining high performance with application flexibility. The 5-inch TFT-LCD screen with a resolution of 800x480 px and capacitive touch ensures precise operation and a clear image. The device offers Wi-Fi and Bluetooth connectivity, supports LVGL, openHASP, and the popular Arduino IDE, PlatformIO, and MicroPython environments. Thanks to USB-C, TF, UART, and I2C connectors, it is ideal for IoT projects, automation, and intelligent control systems. Elecrow CrowPanel 5.0"-HMI

DC-DC Step-up converter module based on the U3V70F5 system. Input voltage 2.9 ... 5V, output voltage 5V, maximum current 10A. Two mounting holes. Polol 2891

12-bit DAC converter module designed to work with the M5Stack sets. It enables the conversion of digital signals into an analog signal. M5Stack DAC Unit

Module with MEMS microphone; model SPW2430 with built-in amplifier. The plate also has a 3.3 V voltage stabilizer needed to power the microphone. Adafruit 2716

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 5454

Module with 1 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 30 mm. The sensor will be used in projects that require detection of changes in the ground, e.g. in linefollower robots. Pololu 4201

Evaluation set for IoT applications. Rich set of equipment in such peripheral systems as WiFi, OLED display, headphones, microphone, sensors (temperature, humidity, motion, pressure) make it a complete tool that will be used in many projects. DFRobot DFR0512

5 m long LED strip with 100 purple LEDs. It is powered with the voltage of 12 V through the DC connector 5.5 x 2.1 mm. DFRobot FIT0385-P