From: belvilad@dunx1.ocs.drexel.edu (A. Belville)
Subject: Re: flash LEDs with sound?
Organization: Drexel University, Philadelphia
Lines: 38

In article <199304241405.AA11067@kepler.unh.edu> dmn@kepler.unh.edu (There's a seeker born every minute.) writes:
>
>
>     I'm looking for a circuit that will flash an led on in response 
>to the output from a walkman cassette player. How could I do this?
>I don't want it just to turn on, I want it to 'strobe' once so to speak,
>per every beep I put on a cassette tape. 
>
>     Would it be better to use a circuit based on the volume of the beeps
>on the cassette, or better for the leds to respond to a tone of a certain
>frequency? Is there any easy way to do either of these? I'm looking for 
>the simplest circuit possible. I guess what I'm asking for is some sort of
>color organ, but not quite. Let me trt to explain again...
>
>
>     I'm going to have a pattern of beats (or beeps) on a cassette tape.
>So on the tape you'd hear:   beep! (pause) beep! (pause) beep! (pause)..etc. 
>, with speed increasing as time goes on. I want to synchronize an LED (
>probably two of them) with the beeps on the cassette tape. So the LED, with
>each beep, would go on and off real quick, generating a strobe light sort
>of effect. The rapidity of the beeps on the tape would in turn effect the
>rapidity of the blinking of the LEDS. And if there was no sound on the tape
>(except for background his), the LEDs would remain off. Please help!
>
>
>  Thanks,
>
>    Dana

	Try looking in a Magizine called Radio Electronics, May 1992 issue,
page 41.  There is a circuit for a Midi Light controller there.  

-=- Andy -=-

_______________________________________________________________________________
Andy Belville                          || It's taken me a long time, but I've
belvilad@dunx1.ocs.drexel.edu          || fallen in Love with a beautiful woman.
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