AC-LED
Many Simple LED AC mains voltage & current indicator circuits
Battery Level Indicator Circuit using LM3914
3 LED Battery Level Indicator Circuit | Homemade Circuit Projects
Application of ordinary light-emitting diode in power indicator-Led Indicator
Audio Power Indicator with 6 LED Bars - EEWeb
Indicator LED directly to AC mains. Which method would you use? - Electrical Engineering Stack Exchange
LOW BATTERY INDICATOR CIRCUIT | SHRIRAM SPARK
Practical LED Indicator And Flasher Circuits | Nuts & Volts Magazine
LED circuit - Wikipedia
Battery Level Indicator Circuit
debugging - Power indicator for circuits with voltages much higher than LED forward voltages (say 15-48V) - Electrical Engineering Stack Exchange
Blown Fuse Indicators. Simple Design 10 – Hobby Projects
power supply - Add on/off indicator LED to circuit - Electrical Engineering Stack Exchange
Simple 220V Mains Indicator LED
switches - How to connect an LED indicator to a circuit? - Electrical Engineering Stack Exchange
Simple 220V Mains Indicator LED
led power indicator circuit | Electronic circuit design, Electronics circuit, Circuit design
Flashing-LED Battery-Status Indicator Circuit - EEWeb
LED Indicator For AC Mains 240 Volts | How To Connect LED To 230 Volts - YouTube
Practical LED Indicator And Flasher Circuits | Nuts & Volts Magazine
3.7V Battery Low and Full Level Indicator Circuit : 9 Steps (with Pictures) - Instructables
Battery Status Indicator Circuit
Simple and Useful LED circuits
