Search found 4 matches

by rkennedy
Sun Feb 18, 2007 3:52 pm
Forum: General Discussion
Topic: How to best control and electromagnet with sound
Replies: 16
Views: 3919

I'm going to get a rectifier this week, but can DC do the job? I was lead to believe that only AC can deal with audio signals.
by rkennedy
Sun Feb 18, 2007 9:44 am
Forum: General Discussion
Topic: How to best control and electromagnet with sound
Replies: 16
Views: 3919

Like I said, I am a bit new to this, so pardon any communication problems. Here is exactly what I want. I want to take audio input from a standard MP3 player via the headphone jack and use that to create a varying magnetic field which will cause a pool of magnetic fluid to respond in time with the a...
by rkennedy
Sat Feb 17, 2007 4:11 pm
Forum: General Discussion
Topic: How to best control and electromagnet with sound
Replies: 16
Views: 3919

Basically that is it.

Noise = magnet on at full power

Some noise = magnet on at less than full power

Silence = magnet off

It seems like I may have to go DC with this though? Wouldn't A/C have too much "hum" to let the field completely collapse?
by rkennedy
Sat Feb 17, 2007 3:27 pm
Forum: General Discussion
Topic: How to best control and electromagnet with sound
Replies: 16
Views: 3919

How to best control and electromagnet with sound

O.k. I'm new to this, but I think I am starting out slowly enough with this one... I want to do a project where sound controls and electromagnet, which in turn controls some magnetic fluid. Nothing fancy here. Just Audio ---> Magnet. Here is what I think I know so far.... :) A voice coil for a speak...