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Last Updated on: Thursday, June 25, 2015 06:23 AM

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LINE STATUS INDICATOR for 1 Telephone Line


This hobby circuit monitors one phone line.

Click on Drawing Below to view PDF version of Schematic

Circuit Phone Line Status Light designed by Dave Johnson, P.E. (June 1, 2000)


More  Indicator Circuits    LEDs  
 Micro Power Circuits    Telephone Circuits

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