Breadboard for "LED - Digital Clock, HT16K33"


Fritzing diagram: led-digits-clock-HT16K33.fzz


Run this example from the command line with:

node eg/led-digits-clock-HT16K33.js
var moment = require("moment");
var five = require("johnny-five");
var board = new five.Board();

board.on("ready", function() {
  var digits = new five.Led.Digits({
    controller: "HT16K33",
  var toggle = 0;

  setInterval(function() {
    // Toggle the colon part: on for a second, off for a second.
    digits.print(time(toggle ^= 1));
  }, 1000);

function time(showColon) {
  var display = "    " + moment().format(
    showColon ? "h:mm" : "h mm"
  return display.slice(-5);

Additional Notes

Learn More:


Component Classes in this example:

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