Arduino Uno Rev3 SMD Arduino Uno R3 SMD is a variation of the Uno with SMD. It has 14 digital input / output pins (of which 6 can be used as PWM outputs), 6 analog inputs, a 16 MHz crystal oscillator, a USB connection, a power connector, an ICSP header and a reset button. In addition, Uno SMD offers the following additional features: - ATmega16U2 instead of 8U2 as a USB to serial converter - 1.0 Code A000073 Backorder Price €24.99