Arduino Uno compatible development board based on the ATmega328. 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 adaptor or battery to get started.
The Uno differs from all preceding boards in that it does not use the FTDI USB-to-serial driver chip. Instead, it features the ATmega16U programmed as a USB-to-serial converter.
This new enhanced version includes additional holes to fit male header strips (included) next to the standard female headers plus additional serial port and I²C bus access points.
Features| Operating Voltage | 5V |
| Input Voltage (Recommended) | 7-12V |
| Input Voltage (Limits) | 6-20V max. (power adaptor not included) |
| Microcontroller | ATmega328 |
| PWM Channels | 6 |
| Analogue Input Pins | 6 |
| Digital I/O Pins | 14 (6 of which provide PWM output) |
| DC Current per I/O Pin | 40 mA |
| DC Current for 3.3 V Pin | 50 mA |
| Flash Memory | 32 KB (ATmega328) of which 0.5KB used by bootloader |
| SRAM | 2 KB (ATmega328) |
| EEPROM | 1 KB (ATmega328) |
| Clock Speed | 16 MHz |
| Length | 68.6 mm |
| Width | 53.3 mm |
| Weight | 20 g |
