Vector network analyzer with two ports. It can perform measurements for frequencies from 50 kHz to 900 MHz. Equipped with an LCD display, it can be connected to a computer via USB. Nano VNA

The Arduino Nano R4 (ABX00142) is equipped with a Renesas RA4M1 microcontroller with an Arm Cortex-M4 core and a Qwiic connector, providing extensive expansion options and full compatibility with popular Nano accessories. Designed for educational projects, prototyping IoT solutions, automation, measurement devices, and edge computing applications, the board enables easy integration of modern peripherals and rapid project implementation in the target environment. Arduino ABX00142

The MAX31865 amplifier module is an ideal tool for accurate temperature measurement in various applications. It is compatible with 2, 3 or 4-wire PT100 RTD temperature probes. Adafruit 3328

Gravity: Analog Signal Isolator is a module that allows to isolate sensors in the system and eliminate mutual interference of sensors powered by 5V. DFRobot DFR0504

High-performance magnetic antenna, optimized for communication with the Iridium satellite system, made of durable materials resistant to UV, moisture and high temperatures. It has a waterproof housing compliant with the IP69 standard, as well as a wide operating temperature range from -40 ° C to + 85 ° C. Thanks to the magnetic holder, the antenna is easy to install and remove, and the standard SMA connector and 300 cm LL100 coaxial cable provide convenience of use. SparkFun WRL-25068

Omnidirectional antenna designed for transmitting and receiving at 401 MHz. It is compatible with the ARGOS ARTIC R2 satellite communication switchboard. SparkFun WRL-17523

Gravity sensor adapter with 3-pin terminal connector. There are two 10 kΩ pull-up and pull down resistors on the board, set with a jumper. DFRobot DFR0055

A class-D audio amplifier designed for the Pimoroni Yukon platform, offering up to 25W of mono output. The module allows for connection to speakers with an impedance of 4Ω or greater and delivers clean, dynamic sound thanks to the TAS2780 chip. Equipped with a temperature sensor and screw terminals, it\'s ready to use, no soldering required. Pimoroni PIM689

Class D stereo sound amplifier based on the Texas Instruments TPA2016D2 circuit. It can work with 4 Ω speakers with power up to 2.8 W or 8 Ω with power up to 1.7 W in stereo mode. SparkFun DEV-20690

BOB-11044 OSHWTPA2005D1 class D audio amplifier module. The chip can work with a loudspeaker up to 1.4 W and 8 Ohm. SparkFun BOB-1104

LM386 audio amplifier module. It is supplied with the voltage ranging from 4 to 12 V. The set includes an 8 Ω, 0.5 W loudspeaker. DFRobot DFR0064

Audio module with DAC, headphone amplifier and display, designed to work with the Raspberry Pi. It is based on the PCM5100A system and communicates via the I2S interface. Pimoroni PIM482