For our final electronics project, my partners Eitan, Shel and I decided to go crazy and send an audio signal across the room over an infrared light wave.

For all you electronics people out there, our signal came from a CD in the computer which was output to a T1 line, modulated and sent through a transmitter ending with an infrared diode. The signal was then picked up by a infrared sensitive phototransister at the receiving end, fed through an audio amplifier and then output to a relic paper speaker, probably from a time when Eisenhower was president. The cone I'm holding is a little dish coated inside with aluminum foil designed to increase reception, and if you line it up right with the cone on the receiving end, even from across the room, one is greeted by the ultra-gratifying sound of U2 pumping through the shitty speakers. Playing around with these kinds of things always brings back memories of making rubber band powered racing cars in high school, and reminds me why I got stuck doing something like physics to begin with.