Using an 74HC595 Expander as a Virtual Board (8 Pin Digital Output)

Breadboard for "Expander - 74HC595"


Fritzing diagram: expander-74HC595.fzz


Run this example from the command line with:

node eg/expander-74HC595.js
const { Board, Expander, Leds } = require("johnny-five");
const board = new Board();

board.on("ready", () => {
  const expander = new Expander({
    controller: "74HC595",
    pins: {
      data: 2,
      clock: 3,
      latch: 4

  const virtual = new Board.Virtual(expander);
  const leds = new Leds(
    Array.from(Array(8), (_, pin) =>
      ({ pin, board: virtual })




Component Classes in this example:

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