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Article #148

#148

From: WGREGGS
Date: Tue, 22 Oct 1985 21:44

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Active Line Detector Analysis

An active line dectector should not be to hard for someone to design.
The phone line has a potential of about 5 volts when off the hook. Its
on hook voltage is considerably higher.  All that need be designed is
a simple circut that detects the low voltage.  When the device sees
this lower voltage is draws a very small amount of current for the LED.
I am unfortunatly unable to take it beyond this stage.  I would
however be interested in the plans if someone can handle the next step.

                                           W. Gregg Stefancik
                                          Clemson University

BITNET: wgreggs@clemson.BITNET
ARPA  : wgreggs%clemson.BITNET@wiscvm.ARPA

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Date: Tue, 22-Oct-85 17:44:48 EDT
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Posted: Tue Oct 22 17:44:48 1985
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