Digispark - a miniature development board from ATtiny85 (compatible with Arduino)

Module with ATmega328 microcontroller from the AVR family (32 kB Flash, 2 kB SRAM, 1 kB EEPROM). The module has 14 I/O lines, 6 PWM channels, 8 analog inputs

Board compatible with Arduino Nano. It is based on the ATmega328P microcontroller with 32 KB Flash, 2 KB SRAM and 1 KB EEPROM. It has 12 LEDs, a buzzer and a user button. Cytron Maker Nano

The board is compatible with Arduino, based on the ATmega328P microcontroller from the AVR family, 14 I/O lines, 6 PWM channels, 6 analog inputs are available to the user. The CH340G chip communicates via a USB interface. In addition, it has 12 LEDs, a programmable button and a embedded buzzer. Cytron Uno Maker

Board compatible with Arduino, based on ATmega328P. Equipped with an area with prototype holes, a breadboard, 12 LEDs, a button and a buzzer. Cytron MAKER-UNO-X

Microcontroller board based on the ATmega328

Compact microcontroller board with an ATmega32U4 chip that integrates with USB to act as a HID device such as a keyboard or mouse. It operates at 5V at 16MHz, offering 20 digital I/O lines, of which 7 support PWM and 12 act as analog inputs.

Small evaluation board based on the ATmega328, RoHS

Development board with ATmega4809 microcontroller and Microchip ECC608 cryptographic chip. It is equipped with 6 analog input pins, 14 digital inputs/outputs (5 as PWM output) and Grove ports. Seeed Studio 102010288

DFRobot DFR0355 is a versatile development board that combines GSM, GPRS, and GPS functions into one compact device. With the ATmega32u4 microcontroller and integrated SIM808 module, this board is ideal for applications such as vehicle tracking, remote communication, satellite positioning, and IoT projects. Built-in power-saving features and battery power make it an excellent choice for applications requiring low power consumption and reliable operation in various conditions. DFRobot DFR0355

Development board equipped with RP2040 microcontroller, RGB LED diodes, buzzer and Qwiic/STEMMA QT connectors. Pin spacing compatible with Arduino Nano. Cytron MAKER-NANO-RP2040

Board with Atmel ATmega328P microcontroller from the AVR family, there are 14 I / O lines, 6 PWM channels and 6 analog inputs. The additional ATmega16U4 microcontroller realizes communication via the USB interface

Microcontroller board based on Leaf Maple, STM32F103RB, USB, RoHS

Module with ATmega4808 microcontroller from AVR family (48 KB Flash, 6 KB SRAM, 256 B EEPROM). The module has 14 I / O lines, 6 PWM channels, 8 analog inputs.

Development board based on the R7FA4M1AB3CFM microcontroller and compatible with Arduino UNO R4 Minima. Waveshare R7FA4 PLUS A

Development board based on the R7FA4M1AB3CFM microcontroller and compatible with Arduino UNO R4 WiFi. It is equipped with ESP32-S3FN8 with a dual-core 32-bit Xtensa LX7 core and wireless communication in the 2.4GHz WiFi band and Bluetooth LE. Waveshare R7FA4 PLUS B

The board is equipped with ATSAMD21 microcontroller with ARM Cortex-M0 core. It has connectors and dimensions compatible with the Arduino Uno Rev3. HW-819