Do audio devices put out alternating current? Does the current ever switch itself?
I'm making a prop Geiger counter for Halloween, and i was going to have bi-polar LEDs on it depicting if it is safe or not to proceed.
I have worked out all the main issues with making a prop Geiger counter, Producing the sound, amplifying it, and distributing it. I was going to have one channel of my MP3 player play Geiger counter clicks and the other channel square waves to drive a transistor to drive the Bi-polar LEDs
I was going to have Red LEDs light up to the positive part of the wave, and the Green to the negative. This is where i ran into a small problem, i don't really remember if Electronically produced sound waves have both Parts of a wave (look at the picture), or of it just produces a positive pulse without reversing polarity.
I will be using a computer speaker amplifier for this project
(basically, i need to know if Computer speaker amplifiers produce AC current)