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The board is equipped with ATSAMD21 microcontroller with ARM Cortex-M0 core and SPI Flash memory, GPIO pins and RGB diode. Adafruit 3505

Adafruit HUZZAH32 is a development board with a built-in WiFi ESP32 module. Processor frequency: 240 MHz, Li-Pol battery charging system. Adafruit 3405

Development kit with the nRF5340 Bluetooth 5.2 SoC chip, which supports BLE, BT mesh, NFC, Thread and Zigbee protocols. Nordic Semiconductor nRF5340-DK

Stabilized power supply with programmable memory and smooth voltage regulation in the range of 0 ... 30 V and smooth current regulation in the range of 0 ... 5 A and output 5 V, 3 A. Design of the power supply based on the transformer. The power supply is distinguished by large precision LED displays that keep you informed about the current voltage and load.

Programmable Logic IC Development Tools Cyclone V SE 5CSEMA4U23C6N + 800MHz Dual-core ARM Cortex-A9 processor. Terasic P0496

LCD panel with the possibility of controlling its transparency. Can block up to about 95% of incident light. Adafruit 3330

Soil moisture sensor with I2C interface. The probe has two pointed tabs, making it easy to insert into the ground. The sensor is supplied with the voltage of 3.3 V or 5 V. SparkFun SEN-17731

The module is equipped with four 10A / 250VAC relays controlled independently via a serial bus (UART) or from a PC (through a microUSB connector). The NO / NC contacts of the relays have been led to the ARK screw terminals. ICSTATION ICSE012A

Resistive soil moisture sensor. The board is equipped with a Grove connector and communicates via an analog interface. Seeed Studio 101020008

A stereoscopic microscope with LED backlight, equipped with a trinocular head with an entrance to the camera. It has a wide stand for the test items. KOPPACE KP-7045T-B3

The module with a TA12-200 current sensor with a measuring range of alternating current up to 5 A. The board is equipped with a Grove connector and communicates via an analog interface. Seeed Studio 101020027

Module with ultraviolet (UV) sensor based on the GUVA-S12D system. It allows measurement of radiation with a wavelength in the range from 240 to 370 nm. The module has a connector in accordance with the Grove standard. Seeed Studio 101020043

A volume sensor designed to detect loud ambient sounds. The module uses a microphone and LM2904 amplifier. The output value (analog signal) depends on the volume of the detected sound. In order to eliminate interference, the microphone signal is subjected to double filtering. Seeed studio 101020063

It has 10 segments, one can be highlighted in red, one in yellow, one in light green, the rest in green. This type of display can be used to indicate battery charge, liquid level in the tank, volume etc. Seeed Studio 104020006

Module of the 3-axis LIS2DH, I2C accelerometer. DFRobot SEN0224

The CY7C65213 USB to UART serial breakout is designed to provide users with a means to access all available I/O pins on the IC, and to provide a 6-pin UART header that is compatible with other SparkFun breakout boards. This breakout has a microUSB connector and other support circuitry to get the IC quickly up and running. BOB-13830

Controller module for building an arcade game dedicated to Raspberry Pi. Connectors placed on the board allow you to connect 6 momentary buttons, a joystick and a loudspeaker. Adafruit 3422

Module with an analog current sensor. Enables measurement of alternating and direct current up to 20 A. DFRobot SEN0214

A set for building a balancing robot. It has a board with an ATmega 32u4 microcontroller, engine controllers, modules with quadrature encoders and an IMU system (gyroscope, accelerometer, magnetometer). Pololu 3575

The DE10-Standard Development Kit presents a robust hardware design platform built around the Intel System-on-Chip (SoC) FPGA, which combines the latest dual-core Cortex-A9 embedded cores with industry-leading programmable logic for ultimate design flexibility. P0493