Mains Voltage Indicator with a LED.

I need an AC line 220V light display or main voltage monitor. Because the home ‘s electric of his brother a very often problem. Below a figure is the 230V AC voltage indicator circuit. We use the LED for display the power ac line, because cheap and convenient. The other devices, nothing more.
The R1 resistor act to reduce the current and a short circuit protection similar fuse. The C1 is the capacitor the current depression. It works well. When used with AC power. And rarely have problems with heat. The D1 diode is used to protect feedback voltage for LED1.
Important, you choose C1 is only the high voltage about 630V. Be careful, direction contact with into circuit can cause electrical shock.

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