8 Mm LED on AC




About: Now I am a retired person, who enjoys life and making small things to pass the time keep myself busy.

Intro :-

This is a very simple and easy to make all-purpose LED light. It runs on AC and gives a very bright light.

You can use 12 to 24 White, extra bright LED’s of 8mm-30mA with this circuit.

My friend qs helped me with the design of this circuit. I specially thank him for his help.

Step 1: Part List..

One Non polar condenser 0.33uF / 400 volts or more.

Four 1N4007 Diodes for Bridge rectifier.

One Condenser 100uF to 250uF- 50 volts or more.

One Resistance 1K-1Watt.

12 or up to 24 Bright White LED’s of 8mm – 30mA.

Wire solder etc……..

Step 2: Construction..

Here I have used a CD plastic box and an old CD to mount the12 LED’s.

I used the round pointed tip of my Soldering Iron to punch holes on the CD to fix the LED’s.

The parts of the Circuit go on a flat plastic sheet, placed under the CD.

Step 3: The Circuit..

Solder the parts of the circuit on a plastic sheet such as
an old ATM Bank card as shown in the diagram.

Take care to place a non-conductive sheet between the

LED and the circuit, to avoid short circuit.

Step 4: Enjoy

Plug in to the 220 volts AC Mains and Enjoy…………

Step 5:



    • Warm and Fuzzy Contest

      Warm and Fuzzy Contest
    • Remix Contest

      Remix Contest
    • Faux-Real Contest

      Faux-Real Contest

    11 Discussions


    1 year ago

    why 1 k resistance is used here? plz explain the need of that resistance...


    2 years ago

    Hi, Mr Dipankar,

    I made your 8mm led on AC circuit exactly as per the circuit diagram made by you. I have given 15 leds. But only 1 led is glowing and bthe others are not.

    Pls revert me back ASAP.

    E-mail id: subhadeepmalakar.nias@gmail.com

    1 reply

    Reply 2 years ago

    Please check the Polarity of your circuit, use 8,10,12,14,16,18 LED's


    4 years ago on Introduction

    i did the same circuit i got 98 volts dc current but i want 6v or 12 v dc what should i do?


    4 years ago on Introduction

    Is there any energy consumed in the RC circuit included to reduce the AC voltage. Also, could you tell me how I can determine value of X-capacitance required for different number of LEDs.

    If it is possible to create LED lighting with so simple of a design there doesn't seem to be any reason for the use of complex LED drivers. The LED chips are quite inexpensive and even if this wouldn't allow them to last the 100,000 hours they are supposed to, they can just be replaced when the circuit fails.

    1 reply

    Reply 4 years ago on Introduction

    Energy is always consumed when the circuit is complete, This project consumes very less energy compared to the CFL light.

    This is a very simple and easy to make all-purpose LED light. It runs on AC and gives a very bright light.


    4 years ago

    I think it would be wise to include a large warning about this type of circuit. This uses a capacitor to limit the current, a known and useful principle BUT it also means there is no isolation from the mains. That is no isolation transformer thus the circuit is at mains potential. Also it should be mentioned that it is not enough to have a capacitor rated at 400v, it should be X rated. This means that if it failed it will, or should, go open circuit not short circuit. Basically a general warming, MAINS SUPPLY CAN BE LETHAL.

    3 replies

    Reply 4 years ago on Introduction

    I really fail to understand why everyone keeps ranting "Not isolated","Not isolated"... If anyone has made a circuit that is connected to the mains they are likely to get electrocuted if they touch the wrong things at the wrong time. If one were to go ahead and put a transformer here and someone was intent on hurting himself what stops him from touching the point where the primary of the transformer meets the mains. If one is working with AC they understand that, and the power of electricity and how it can kill. Things have to be done responsibly, whether on instructables.com or in a pub. Keep that in mind and no one is harmed.


    Reply 4 years ago on Introduction

    Yes it can be LETHAL if you are going to put your fingers where it is not wanted.

    Be careful and disconnect it from the mains if you are going to touch it.......