YourITronics

An electronic circuit is assembled inside a CD case with a headphone jack on the side. The device plays back 40 minutes of low-fi 1-bit electronic music—the lowest possible digital representation of audio. The device is available for $25 and it’s sold as a form of art.

40 Minutes Of Low-Fi 1-Bit Electronic Music: [Link]

Yeah you know what im talking about, you’re listening to your favorite tunes, and you would like some light to blink on the rhythm, i mean who doesn’t ? We’ve all been trough this phase. So what can you do ? well the solution its pretty simple you solder a transistor together with a switch, some LED’s and a stereo jack connector and its done. Yeah its for beginners. Here is the parts list:

• 4 LEDs (any collor)
• P2 plug
• 2 position switch
• TIP31 component
• Box to put all the stuff (if you want)
• Soldering iron and accessories
• Cable

Here is the schematic:

And here is the circuit in action:

Music Blinking LED’s :

if you feel like you need additional info check the author’s page

[Link]