| /* | |
| Arduino Starter Kit example | |
| Project 15 - Hacking Buttons | |
| This sketch is written to accompany Project 15 in the Arduino Starter Kit | |
| Parts required: | |
| - battery powered component | |
| - 220 ohm resistor | |
| - 4N35 optocoupler | |
| created 18 Sep 2012 | |
| by Scott Fitzgerald | |
| https://store.arduino.cc/genuino-starter-kit | |
| This example code is part of the public domain. | |
| */ | |
| const int optoPin = 2; // the pin the optocoupler is connected to | |
| void setup() { | |
| // make the pin with the optocoupler an output | |
| pinMode(optoPin, OUTPUT); | |
| } | |
| void loop() { | |
| digitalWrite(optoPin, HIGH); // pull pin 2 HIGH, activating the optocoupler | |
| delay(15); // give the optocoupler a moment to activate | |
| digitalWrite(optoPin, LOW); // pull pin 2 low until you're ready to activate again | |
| delay(21000); // wait for 21 seconds | |
| } | |