LED Indicator For AC Mains 240 Volts | How To Connect LED To 230 Volts - YouTube
Many Simple LED AC mains voltage & current indicator circuits
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debugging - Power indicator for circuits with voltages much higher than LED forward voltages (say 15-48V) - Electrical Engineering Stack Exchange
How to make a Battery Level indicator, battery volt level indicator - YouTube
3.7v Lithium Battery Level Indicator
LED Power Indicator Circuit For 230v - 240v AC Mains
Flashing-LED Battery-Status Indicator Circuit - EEWeb
3 LED Battery Level Indicator Circuit | Homemade Circuit Projects
Audio Power Indicator with 6 LED Bars - EEWeb
Indicator LED directly to AC mains. Which method would you use? - Electrical Engineering Stack Exchange
Practical LED Indicator And Flasher Circuits | Nuts & Volts Magazine
