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 Last Updated on:  08/29/2008 02:08:59 PM

Low Voltage 120vac Power Line Alarm
designed by David A. Johnson, P.E.

This circuit will turn on a beeper when the line voltage drops below 100 volt AC.
Click on Schematic below to view PDF version of this Circuit
Circuit Low Voltage 120VAC Power Line Alarm Circuit designed by Dave Johnson, P.E. (June 30, 2006)

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