switches - How to connect an LED indicator to a circuit? - Electrical Engineering Stack Exchange
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Simple 220V Mains Indicator LED
LED Indicator Light:in 5 Wonderful Applications - indicatorlight
Many Simple LED AC mains voltage & current indicator circuits
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Simple and Useful LED circuits
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Practical LED Indicator And Flasher Circuits | Nuts & Volts Magazine
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Indicator LED directly to AC mains. Which method would you use? - Electrical Engineering Stack Exchange
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Six-LED Bar Power Indicator - RED - Page102
Many Simple LED AC mains voltage & current indicator circuits
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power supply - Add on/off indicator LED to circuit - Electrical Engineering Stack Exchange
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Application of ordinary light-emitting diode in power indicator-Led Indicator
Main power supply Indicator circuit
Supply Voltage Indicator
