Arduino UNO can trigger an interrupt on digital pins 2 and 3 while Arduino 101 can trigger interrupts on all pins. External interrupts that are triggered by external events can happen on all pins.

When the blade passes in between then, the receiver shuts off a transistor connected to one of the Arduino’s external interrupt pins.

He further explains that, with the Arduino Uno, you can remove the reference capacitor from the circuit, and simply use the stray capacitance present in the board and microcontroller, which can be ...

Arduino peripherals, including Arduino shields, sometimes take up multiple I/O pins and leave little room to create a project that requires multiple Arduino peripherals.

The Uno Rev3, is a great beginner board as it's included in many starter kits. It's also complemented with a host of online resources that even without the official Projects Book from Arduino, you ...