The Atmega328p Development Board Compatible with Arduino UNO R3 is a microcontroller board based on the ATmega328P. It has 14 digital input/output pins (of which 6 can be used as PWM outputs), 6 analog inputs, a 16 MHz quartz crystal, a USB connection, a power jack, an ICSP header and a reset button. It contains everything needed to support the microcontroller; simply connect it to a computer with a USB cable or power it with a AC-to-DC adapter or battery to get started.

Technical specifications:
* Microcontroller: ATmega328
* CH340 for USB/Serial Interface
* Operating Voltage: 5V
* Input Voltage (recommended): 7-12V
* Input Voltage (limits): 6-20V
* Digital I/O Pins: 14 (of which 6 provide PWM output)
* Analog Input Pins: 6
* DC Current per I/O Pin: 40 mA
* DC Current for 3.3V Pin: 50 mA
* Flash Memory: 32 KB (ATmega328) of which 0.5 KB used by bootloader
* SRAM: 2 KB (ATmega328)
* EEPROM: 1 KB (ATmega328)
* Clock Speed: 16MHz
* Length: 68.6 mm
* Width: 53.4 mm
* Weight: 25 g
* Built-in bootloader.
* Female Header: Welded female header

Memory:
The ATmega328 has 32 KB (with 0.5 KB occupied by the bootloader). It also has 2 KB of SRAM and 1 KB of EEPROM

Power Supply Specifications:
Input : 110~240V AC 50/60HZ
Output : DC 9V 1A
Cable length: 100 cm (40")
DC Connector Dimension: 5.5mm * 2.1mm - Arduino compatible
DC Connector polarity: Positive inside, Negative Outside
Short circuit protection
Overload protection
Over voltage protection
Efficiency: ≥80%
UL CE CCC