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Circuits designed by David Johnson, P.E.
Last Updated on: Friday, November 17, 2017 06:32 AM

List of Dave's Circuit Designs

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Indicator Circuits

 

 

120vac/240vac Indicator - June 9, 2000


Two LEDs indicate if a power line has 120vac or 240vac voltage on it.
 

Click on Drawing Below to view PDF version of Schematic

Circuit 120VAC / 250VAC Indicator Light  (June 30, 2006)



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Dave's Circuits


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