HOW TO: Send Audio/Your Voice Over a Beam of Light

Step 6 Using It

To use it, just plug the transmitter into any audio source (CD player, radio, etc.), and turn it on! It will modulate the sound signals into light, and the receiver (plugged into an amp) will turn it back into sound! If you want to modulate your voice, plug the microphone into the input on an amp, and the transmitter to the output (to external speaker) jack. The final product may look a little like the below picture.

Comments

[Pyro Fiend]

This is SOOOOOOOO cool. I can't believe it's this simple and actually works!
I didn't understand what it was at first, though; I thought this was an LED display that was in sync. with an audio input (like a visualizer, kind of). When I realized what it actually was however, it blew my mind. Very cool. Good job.

[Ed65]

Interesting project but one thing I'm not clear on... How exactly is the microphone wired to the batteries? Could you include a diagram showing that? Couldn't the microphone just be plugged directly into the Radio Shack Mini-Amp? I've tried previously to build a similar version of this project w/o the audio amp but could never get it to work. Please understand that I'm not nit picking your project, I'm just trying to understand how to get it to work for me since previous my previous (similar) projects have been exercises in futility. Thanks!

[mortaldoom780]

just wire it in series. Note that this microphone is a condenser, not an electret

[shaphieh]

How do wire it in a series

[mortaldoom780]

Search Google for 'wired in series'. And actually, a correction to myself, it IS an electret; a condenser is, as I found out, a type of electret mic, but just has two leads. Sorry for the confusion.

[numanumafan]

this project is so pimp. my friend did this for a school project. i think this revealutionized the way of listaning to music.