The Arduino Uno Rev3 is a microcontroller board developed by Arduino.cc that is different from its predecessors in terms of functionalities. For starters, this is considered the best and most robust board out there to commence with electronics and coding.
The Uno is also the most used and documented board of the whole Arduino collection - it contains everything needed to support the microcontroller: input/output pins (of which 6 can be used as PWM outputs), analog inputs, a 16 MHz ceramic resonator, a USB connection, power jack, an ICSP header, and a reset button.
Operating Voltage: 5V
Input Voltage (recommended): 7-12V
Input Voltage (limit): 6-20V
Digital Input/Output Pins: 14 (of which 6 provide PWM output)
Length: 68.6 mm
Width: 53.4 mm
Weight: 25 g
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