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Circuit: FLASHING LED POWER INDICATOR DRAWS LOW CURRENT __ Circuit designed by David A. Johnson, P.E.
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switches - How to connect an LED indicator to a circuit? - Electrical Engineering Stack Exchange
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1.2 - 12V / 1A Low Voltage LED Indicator Power Supply with LM317
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LED Power Indicator Circuit For 230v - 240v AC Mains, Single LED on AC Mains. | Circuit, Electrical circuit diagram, Digital circuit
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DDDIG circuit A Led indicator was added to indicate proper power supply... | Download Scientific Diagram
Many Simple LED AC mains voltage & current indicator circuits
