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Laser Trip Wire

Breadboard for "Laser Trip Wire"

docs/breadboard/laser-trip-wire.png

 

Run this example from the command line with:

node eg/laser-trip-wire.js
var five = require("johnny-five");
var board = new five.Board();

board.on("ready", function() {
  var laser = new five.Led(9);
  var detection = new five.Sensor("A0");
  var isSecure = false;

  laser.on();

  detection.scale(0, 1).on("change", function() {
    var reading = !(this.value | 0);

    if (isSecure !== reading) {
      isSecure = reading;

      if (!isSecure) {
        console.log("Intruder");
      }
    }
  });
});

 

License

Copyright (c) 2012-2014 Rick Waldron waldron.rick@gmail.com Licensed under the MIT license. Copyright (c) 2015-2018 The Johnny-Five Contributors Licensed under the MIT license.