Each of the 14 digital pins on the Arduino ... support SPI communication using the SPI library. LED: 13. There is a built-in LED connected to digital pin 13. When the pin is HIGH value, the LED is on, ...

The Arduino Uno is the old standby of the Arduino world ... configurable as a UART, I2C, or SPI. USB device and host are also implemented on the chip, but there’s no word in the official ...

If you're on the hunt for the perfect board, then you've probably come across the Uno and Nano. They're two of the most frequently used Arduino variations, but they serve different purposes.

Since the interrupt signal comes from outside the Arduino it is called as external interrupt. Arduino Uno R3 has two external interrupts: int.0 (pin 2) and int.1 (pin 3). While connecting a RT to ...