UNO R3 SMD ATmega328 Compatible Board I2C Interface and a 72 MHz CPU

and a 72 MHz CPU

Sensor Angle: Less than 15 Degrees

Clock Chip: High-precision DS3231 RTC

Wide Operating Voltage: Compatible with 3

DS1307 based RTC

UNO R3 SMD ATmega328 Compatible Board I2C Interface and a 72 MHz CPUThe Arduino UNO R3 SMD is an open source embedded development board based on the ATmega328 microcontroller in an SMD package. As Atmel shifts more of its production to surface mount ICs, the traditional DIP packaged ATmega chips are becoming increasingly rare. To meet the growing demand, we now offer the UNO R3 with an SMD ATmega328. This board retains the same functionality and layout as the original PTH version, although the SMD package requires hot