Basic LED example

LED on pin 13 (Arduino UNO)

LED inserted directly into pin 13


Fritzing diagram: led-13.fzz


Run this example from the command line with:

node eg/led.js
const { Board, Led } = require("johnny-five");
const board = new Board();

board.on("ready", () => {
  const led = new Led(13);

  // This will grant access to the led instance
  // from within the REPL that's created when
  // running this program.


Illustrations / Photos

LED on pin 13 (Arduino UNO)

LED inserted directly into pin 13


LED on pin 13 with breadboard and resistor (Arduino UNO)

LED on a breadboard and demonstrating use of a resistor


Fritzing diagram: led-resistor.fzz


LED on pin 13 (Arduino Mega)

LED inserted directly into pin 13


Fritzing diagram: led-13-mega.fzz


Additional Notes

This script will make led available in the REPL, by default on pin 13. Now you can try, e.g.:

>> led.stop() // to stop blinking
>>  // to shut it off (stop doesn't mean "off")
>> led.on()   // to turn on, but not blink


Component Classes in this example:

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