How to Connect Led Light to Ac Power
Intro: How to Connect Led Light to Ac Power
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 picture.fit your circuit inside that two pin plug close it.now our little project is complete.
2 Comments
Omnivent 5 years ago
Hi,
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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.
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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.
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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).
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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.
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Have a nice day :)
Electro Retro 5 years ago
You are correct your comment is very valuable to me