LED - Digital Clock, Dual Displays

Demonstrates using dual 7 Segment displays.

Breadboard for "LED - Digital Clock, Dual Displays"

Fritzing diagram: docs/breadboard/led-digits-clock-dual.fzz

Run this example from the command line with:

node eg/led-digits-clock-dual.js

var moment = require("moment");
var five = require("johnny-five");
var board = new five.Board();

board.on("ready", function() {
  var hmm = new five.Led.Digits({
    controller: "HT16K33",
  });
  var seconds = new five.Led.Digits({
    pins: {
      data: 2,
      cs: 3,
      clock: 4,
    }
  });

  var minute = null;
  var toggle = 0;

  setInterval(function() {
    var now = moment();
    var min = now.minute();
    var form;

    if (minute !== min) {
      minute = min;
      form = (toggle ^= 1) ? "h:mm" : "hmm";
      hmm.print((" " + now.format(form)).slice(-5));
    }
    seconds.print("  " + now.format("ss.SSSS"));
  }, 200);
});

Additional Notes

Learn More:

JavaScript: A Digital Clock with Johnny-Five

LED - Digital Clock, Dual Displays

Breadboard for "LED - Digital Clock, Dual Displays"

Additional Notes

License