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How To Make LED That Draws From AC Main Line

By on October 8, 2008


A subscriber emailed me with with this question:

“How to make an mains indicator with a LED.In my soldering iron the neon or any light and to replace it I like a LED instead of that light.Please provide me a circuit ( a very simple one) that fits in my soldering iron. “

I channeled him to the website that can could help him out. Please click on the photo to visit the website.

ac led



  1. Berlin C. Alcayde

    December 1, 2009 at 9:53 pm

    Hi Jestine,

    Sir can i ask you, what is R1 component in the circuit. Is it a resistor or varistor?

  2. admin

    December 7, 2009 at 9:50 pm

    HI Berlin,

    In the above circuit R1 is a resistor but why do they put in the voltage rating i have no idea about it.


  3. isaac sumani.

    December 23, 2011 at 11:00 am

    i asked you a question that what does it mean when a tv displays a japanese language and does not allow av input functions no answer til now i need a help please.

  4. admin

    December 26, 2011 at 1:03 pm

    Hi Isaac,

    If your remote control can't change anything then it could be the programs fault in the eeprom or the MCU.


  5. bob engels

    May 23, 2013 at 5:40 pm

    new website format nice


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