This tutorial will guide you through the ... the receiver shuts off a transistor connected to one of the Arduino’s external interrupt pins. He shows how to use this interrupt to measure the ...

Arduino Uno R3 has two external interrupts: int.0 (pin 2 ... as featured articles and great tutorials are available all over the web.

The Arduino Sketch (code) uses the external interrupt (int 0) on Arduino’s digital pin 2 (D2). This is used to read the output pulses coming from the water flow sensor. When Arduino detects the pulse, ...