We've seen theremin mod after theremin mod, but those seeking that distinct sci-fi sound without the physical labor or hefty price tag haven't had much of an outlet until now. Meet Beep-It, a $35 analog optical theremin that sports a simple on / off switch, volume control, one quarter-inch jack, and light sensitive resistor to make you the master of that otherworldly sound. According to its creator, Michael Una, the little s
