Arduino boards are a type of development board that allow you to build and program your own electronic projects. They consist of a microcontroller, which is a small computer on a single chip, and a variety of input and output pins that you can use to connect sensors, actuators, and other electronic components.
Arduino boards is that they are based on open-source hardware and software. Open source means that the designs, schematics, and source code of the Arduino boards are freely available for anyone to access, use, modify, and distribute. This open nature encourages collaboration, innovation, and learning within the Arduino community.
DFRduino Uno made by DFRobot is an Arduino Uno compatible board using the ATmega328P microcontroller
Specifications
Microcontroller ATmega328P
Operating Voltage 5V
Input Voltage (recommended) 7-12V
Input Voltage (limit) 6-20V
Digital I/O Pins 14 (of which 6 provide PWM output)
PWM Digital I/O Pins 6
Analog Input Pins 6
DC Current per I/O Pin 20 mA
DC Current for 3.3V Pin 50 mA
Flash Memory 32 KB (ATmega328P) of which 0.5 KB used by bootloader
SRAM 2 KB (ATmega328P)
EEPROM 1 KB (ATmega328P)
Clock Speed 16 MHz
LED_BUILTIN 13
Length 68.6 mm
Width 53.4 mm
Weight 25 g