Lightbar clock

I’ve been meaning to get on with this project for ages, it was originally going to be based on the espruino pico but I never quiet got round to sorting it all out.

I even prototyped it as a little webpage

In the end I’ve ended up using a Raspberry Pi Zero and Node-RED to drive it all. It uses a 60 segment RGB LED strip I picked up off ebay. The LED strip is driven by the node-red-node-pi-neopixel node from the function node.

Screenshot from 2016-06-17 15-11-27

var date = new Date();
var red = [];
var green = [];
var blue = [];
var b = 125;

for (var i=0; i<60; i++) {

var array = [[]];
var hours = date.getHours();
var hs = ((hours + 12) % 12) * 5;
for (var i=0; i<5; i++) {
    red[hs + i] = b;

var m = date.getMinutes();
green[m] = b;

var s = date.getSeconds();
blue[s] = b;

for (var i=0; i<60; i++) {
        payload: i + "," + 
            red[i] + "," +
            green[i] + "," +
return array;

It just needs a nice mount sorting to hang it on the wall.

Further work may include adding a light sensor to vary the brightness depending on the ambient light levels, a nice way to configure a wifi dongle so it can join the network for ntp time updates and so a user could set the timezone.