Mains Voltage Indicator with a LED.

This is a mains 230V AC voltage indicator and is a LIVE CIRCUIT, so take care.
The Resistor has to be a fusible ceramic wire wound and the capacitor 630V AC or higher capacity.
This circuit has been drawn from my memory and i have not tried it out again, just see if it is ok and then try.
You should use the fuse of 100mA a slow blow if you want but it is very important.
This circuit has to be enclosed in a plastic sealed enclosure to avoid contact.

Read more Source:http://schematics.blogspot.com/2004/11/mains-voltage-indicator-with-led.html
Thank you.