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From: whos@ddsw1.MCS.COM (Ben Feen)
Newsgroups: sci.electronics
Subject: Mind Machine - Need LED Flasher
Message-ID: <1991Apr03.005649.22625@ddsw1.MCS.COM>
Date: 3 Apr 91 00:56:49 GMT
Distribution: sci
Organization: ddsw1.MCS.COM Contributor, Wheeling, IL
Lines: 26

Help!  I want to make a "Mind machine" type device - 2 pairs of red/green
LEDs, arranged thus:

	RG           RG

I will build them into a pair of goggles, and supposedly, the correct
frequency will have psychological effects.  Now:

I want the red and green LEDS to light up like this:

	R            G   - "High" pulse
	G            R   - "Low"" pulse

Or whatever.  The point being that you see red with your left eye,  and
green with your right, and then vice-versa.  I would like to be able to use
a pot to adjust the frequency.  Now - How would I wire something like this?
A 555 timer would be perfect for this, but I don't know how to get a
symmetrical waveform.  (I am a high school 'lectronics student) He who can
develop a good circuit will win everlasting fame in the annals of... well,
I'll be really grateful, at least.

-- 
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