10v trigger for strobe

I guess i really have two questions

How do i make a line level high pass filter?

can i then use this signal on the collector of a transistor, what type of transistor should i use?

thanks again

I've passed this request onto the research team.. Their working hard on the problem right now.. I should have an answer in 1 week :) But seriously..

So you want a flash on the ssss ssss sss sounds...mmmm..... I'll guess 2nd order HP active filters and a peak detector??

Maybe use a PC sound card? D from BC

I wonder if the "experimenter's notebooks" that Radio Shack sells would cover the pieces for this.

Have you searched the web for information?

You need to high-pass, then you need to level detect, _then_ you need to trigger your strobe. You'll want some sort of automatic trigger level setting so that you can turn the music down when the neighbors complain yet still get your flashing lights.

A PIC wouldn't be able to keep up with the high-pass filter part, unless that was _all_ it was doing. I'd either leave the PIC for another project or use it _after_ the signal has been high-passed and level detected.

I'd also look for a circuit first, and only try to invent one if I couldn't find something that looks probable.

--

Tim Wescott
Wescott Design Services
http://www.wescottdesign.com

Posting from Google?  See http://cfaj.freeshell.org/google/

Do you need to implement control loops in software?
"Applied Control Theory for Embedded Systems" gives you just what it says.
See details at http://www.wescottdesign.com/actfes/actfes.html

I would go for a low pass filter to catch the drum beats. If you use HF you might get continuous triggers which are too fast for the strobe. You dont even need a PIC, just use the output of your filter to drive the trigger.

I have used to sound to light systems on my disco laods of times. Look up "sound to light"

You're looking for an old fashioned color organ. Surf over to

and choose the one that suits the level of your construction ability. Use only the high frequency channel for the cymbals. Cheers!!!!

--
Dave M
MasonDG44 at comcast dot net  (Just substitute the appropriate characters in the 
address)

Life is like a roll of toilet paper; the closer to the end, the faster it goes.