1) Small Strip Board
2) 3.5mm Standard audio jack (Male)
3) Wires for Audio input
4) Wires for connecting the LED Strip to the stripboard
5) LED strip
6) 1 TIP 41 Transistor
7) Headphones (Obviously)
8) 3.5mm audio splitter
9) 9 Volt battery along with its connector
10) Probably some tapes
1) Soldering Tool
2) Soldering stand
3) Soldering wire
4) Wire stripper
Alright. Here are the steps.
Step 1) Take the 3.5mm male audio jack and twist it open. Once its opened, you should see this:
Using one wire, connect it to the longest metal and solder it to secure the connection. Take another wire and connect to either one of the remaining metal joint. Here's how it should look like:
Step 2) Take the transistor and mount it on the small strip board. Connect the wiring as follow. Ignore the individual LED. Just replace it with the LED Strip. Ignore the 12 Volt too. I'm using a 9 Volt battery.
If you've wired it all up. It should look like this:
The yellow and green are from the audio jack. The black and red wire at the extreme right links to the battery. I have two wires at the center pin because I'm lighting up both red and blue to create a purple light colour effect. One of the wires connected to the positive of the battery goes to the LED Strip.
Step 3) Just solder everything and your circuit is ready. Just have to do some final touches. I'm using a double sided tape to secure all the circuitry as well as the battery to the left side of the headphones. Image as follows:
Step 4) Connect both the headphone and the audio jack that links to your circuitry to the audio splitter and plug it to any device and watch the light dance. Totally no software or programming involved. :)
A picture of an audio splitter.