15 Arduino Uno R3 Pin Diagram. So you have 6 pins where you can create a pwm, using the analogwrite for arduino uno, the choice for those pins is quite limited. All the 14 digital pins of arduino can be used as input as well as output.
Pinmode(), digitalwrite() and digitalread() are the functions used for this purpose. The voltage should be within the range mentioned above. Only digital pins 2 and 3 can be used as interrupt pins.
● each pin can provide/sink up to 40 ma max.
15 Arduino Uno R3 Pin Diagram. ● each pin can provide/sink up to 40 ma max. Basic circuit diagram of arduino uno r3. Arduino uno r3 is one kind of atmega328p based microcontroller board. The arduino uno is a microcontroller board, based on the atmega8/168/328, uno r3 major in atmega328.