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Article #1517

Alternative to dual pots

#1517
From: NEIL GANDLER
Date: Mon, 03 Aug 1992 01:48
14 lines
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	I recently wrote in asking about dual audio pots but just discovered
an alternative. The key is a simple multiplexor using the versatile 4066b
cmos I.C. I simply allowed two channels of audio to share one channel of
resistance alternately switching between the two. Normally you would hear 
distortion or audio noise or clicks but I used an inverter for one of the
channels and a 555 to provide a high frequency signal using a 10pf cap
to run at extremely high frequencies. It works! Im not sure if its anything
inovating or new but it just made designing my stereo receiver that much
easier. I no longer have to search for hard to find and expensive pots.
The multiplexor circuits costs less than $3. I welcome any comments or
questions. 

	 Neil Gandler
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From: v064mb9k@ubvmsb.cc.buffalo.edu (NEIL GANDLER)
Newsgroups: sci.electronics
Subject: Alternative to dual pots
Message-ID: <BsDu8n.6zC@acsu.buffalo.edu>
Date: 3 Aug 92 01:48:00 GMT
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