Block Diagram Arduino Uno Pin Schematic. Input voltage to arduino when using an external power source. The arduino uno is arguably the most popular arduino board currently available.
It has 14 digital input output pins of which 6 may be employed as pwm outputs 6 analog inputs a 16 mhz crystal oscillator a usb connection a power jack an icsp header along with a reset. The exterior power supply 6 to 20 volts mainly includes a battery or an ac to dc adapter. Arduino disclaims all other warranties express or implied arduino may make changes to specifications and product descriptions at any time without notice.
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Open source hardware certifications for january 2021. Arduino uno pin diagram click the image to enlarge it pin description. The power supply of the arduino can be done with the help of an exterior power supply otherwise usb connection. The arduino uno is really a microcontroller board based on the atmega328.
