How to Connect Led Light to Ac Power

Introduction: How to Connect Led Light to Ac Power

About: I make diy and electronics based projects.

In this instructables I will show you how to connect led to 220v ac power.

NOTE: This circuit is dangerous make it your on risk.

Step 1: More Details in Video

Step 2: Components Needed

1) 3v led

2) 47k 1 watt led

Step 3: Soldering

Solder resistor to any one leg of resistor.

Step 4: Two Pin Plug

Now take a two pin plug and unscrew the top cover. In the inside you can see two rods with screws.

Step 5: Final Procedure

Unscrew the screws from the rod and connect the Circuit like seen in the your circuit inside that two pin plug close our little project is complete.

Step 6: Final Result

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    2 Discussions


    1 year ago



    You _did_ write that this circuit is dangerous, but it is also extremely wasteful, with more than 99% loss.

    220V ac means the LED sees +/-311V peak and with a resistance of 47k, you will get a dim 6.6mA in the LED (less than 20 mW), with a total loss of 2W peak.Even if it only happens at every other half wave, it still comes a bit to close to the 1W rating of the resistor, which further is almost hermetically sealed into the mains plug - a fire trap lurking.


    Another issue is that LEDs are usually rated for max. 5V reverse voltage and you hit it with 311V. I wonder how long it's gonna stay alive.


    On the assembly, you screw into a single wire on one side and into the "flat side" of the bend over resistor lead, which you further mishandle by turning it 180°.

    When using screw terminals of any kind where a screw alone is brought into contact with a lead/wire, springiness of the wire is what makes it hold (that's also why you should never cover a multi-strand wire in solder, if it goes into a simple screw terminal).

    Twist the wire and fold it double with multi-strand wire and make sure the screw touches the short folded piece. With single strand and component leads, twist the "loose" end around the pin in a helical pattern. This will assure the needed springiness. Never ever twist a component lead the way you did, it will weaken the spot where the lead meets the "housing" extremely much (or break it off completely).


    If you have a need for a night light or such, using a capacitive dropper will be almost loss free and won't heat up, but do beware, a lot of capacitive droppers shown on the net (and on this site) are made wrong and some are even pretty dangerous.


    Have a nice day :)

    Electro maker
    Electro maker

    Reply 1 year ago

    You are correct your comment is very valuable to me