Schematic Arduino Uno Block Diagram. The arduino uno is really a microcontroller board based on the atmega328. But the recommended current is 20 ma.
Each pin can provide sink up to 40 ma max. The arduino uno is arguably the most popular arduino board currently available. In the arduino uno pins 3 5 6 9 10 11 have pwm capability.
Here the arduino uno schematic diagram click to enlarge.
Here the arduino uno schematic diagram click to enlarge. 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 button. The arduino uno r3 pin diagram is shown below. Pins 0 13 of the arduino uno serve as digital input output pins.
