piano-led

tl;dr, a web based piano that makes LEDs blink (in the server, through Arduino)

I set this up, exposed my dev server through a localtunnel, and tweeted it

Short term offer: go to http://t.co/07DgwEaz6p and play the piano (keys a-k) and look at the notes making LEDs glow @nodebots

— Shrikrishna Holla (@srikrishnaholla) December 20, 2014

<script async src="//platform.twitter.com/widgets.js" charset="utf-8"></script>

And forgot about it after some time. I started taking a video and after some time, realized I wasn't the only guy playing it (starts at 0:58). You can see after 1:08 that it continues playing even after I stop. That's someone on the public internet lighting up the LEDs using the link I had tweeted.

Video link

<iframe width="560" height="315" src="//www.youtube.com/embed/i91jCQa1jWQ" frameborder="0" allowfullscreen></iframe>

Running it yourself

• Prepare the circuit according to the second exercise on node-ardx
• Clone this repo
• Run npm install
• Run the server DEBUG=piano-led* npm start
• Download ngrok, start a tunnel on PORT 3000 (or whichever one you are using)
• Go to the URL, "Start broadcasting" will be disabled. Enable it using your epic JS skills, and start broadcasting
• Point your webcam to the circuit and share the URL with your friends, and wait for epicness to unfurl

Why? Because we can!

Thanks to

• node-ardx
• johnny-five
• javascript-piano
• RTCMultiConnection demo