Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!swrinde!zaphod.mps.ohio-state.edu!think.com!eplunix!raoul
From: raoul@eplunix.UUCP (Nico Garcia)
Newsgroups: sci.electronics
Subject: Re: Mind Machine - Need LED Flasher
Message-ID: <1058@eplunix.UUCP>
Date: 3 Apr 91 18:48:32 GMT
References: <1991Apr03.005649.22625@ddsw1.MCS.COM>
Distribution: sci
Organization: Eaton-Peabody Lab, Boston, MA
Lines: 17

In article <1991Apr03.005649.22625@ddsw1.MCS.COM>, whos@ddsw1.MCS.COM (Ben Feen) writes:
> 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

Connect the output of your pot-controlled 555 to the clock input of a
counter, say a '163. Take the lowest digit of the counter output as
your control signal, or higher digits for lower frequencies. (This gives
you a much lower frequency range than a normal 555 will give you, with
better control.)

Have fun....
-- 
			Nico Garcia
			Designs by Geniuses for use by Idiots
			eplunix!cirl!raoul@eddie.mit.edu