Light bulb using 230V AC Mains, made using wire connector & no soldering ! (Instructions for 110VAC also hinted below.)

See this link for the earlier version and for step by step guide:


Step 1: Components:

Show All Items
1) 6 or 9 leds - colour of your choice
2) 1k ohm, 1 watt resistor
3) capacitor - 0.22 uF, 400 volt for 230 V AC Mains or 0.47 uF, 250 volts for 110V AC Mains
4) Wire connector
5) Insulation Tape
6) Screw driver
7) 1N 4007 Diodes - four pieces to make a diode bridge

See the pic of the components.

Step 2: Assemble for the Final Results !!!

1. Connect 3 leds in series (plus of one to negative of the other led) so that you are left with one positive leg and one negative leg for this assembly.

2. make 3 such pairs, or two if you wish, so that you either have nine lights or six, as per the wish.

Note: It looks simple but ensure that there is no error in connecting.

3. Join the three sets of positive legs of these pairs to the wire connector. All 3 negatives go to the other side of the wire connector.

4. Now for the bottom portion of the wire connector:
- connect the diode bridge positive to the positive of the led & likewise for the negative.

Note: Be careful in properly assembling the diode bridge. (As per link provided in Components or Acknowledgments)

5. Connect the AC ends of the diode bridge to a resistor & capacitor. It doesnt matter, which side since it is AC part.

6. Connect the loose ends of the resistor & capacitor to the bulb base.

7. Done ! And all this WITHOUT SOLDERING ! ;-D

Step 3: Acknowledgments:

Acknowledgments to:




for their I'bles & ideas !

Dont forget to vote, rate, post pics & comment !


Step 4: Future Projects:

Ideas for you !

1. Light Sensor version
2. Motion Sensor version
3. Both Light & motion sensors
4. Solar Panel as light source

Tip 1:

U can use this simple wire connector concept even for ur 6V & 9V projects and avoid soldering (allergy)!
Now you can always make a project instead of just reading them!

Tip 2:

Why are these "world's best" ?? Coz i used a single capacitor and single resistor and you can put 200 leds on it if you want!
Funny how no one disclosed it to you earlier! ;-DD

Tip 3:

They last a lifetime. I am using mine (and few frndz too at their place) since few years with 8-12 hrs of use per day. Only 3 are in series. Then the triplets are in parallel. So only 3 will fuse out, if one LED goes bad. Out of the 3, isolate & find out which one is bad and simply replace!! Decades of good lighting!

Tip 4:

You can encase the project in a pet bottle to avoid moths, insects, lizards. (I have intentionally not done so to check if it shorts, but its working fine).
<p>sir do u have a schematic diagram for this?</p>
<p>Some very nice LED schematics done in photoshop by member &quot;dipankar&quot;... please check his instructables...</p>
<p>Hello pandyaketan.. Please give my answer. I want to know that what happen if I use 0.47uF 400 volt cap instead of 250 volt.. Please explain. </p><p>Thanx in advance..</p>
<p>Dear Subhankar,</p><p>1. You will get more than 20 mA, required for each led, if you use 0.47 uF capacitor, instead of 0.22 (which provides 20 mA). Check the images for &quot;<strong>ceramic capacitor amperage chart</strong>&quot; from google to compare the different mA for different ceramic capacitors, for details. </p><p>2. So you will require higher value resistor (greater than 1 kilo ohm used by me), to limit the extra current - which becomes heat and brings inefficiency to the circuit. </p><p>3. Alternately, you will have to use more LEDs in different series and parallel combinations, to absorb safely, the higher current and voltages supplied by the 0.47 cap. </p><p>reg</p><p>k</p>
<p>Thank you so much pandyaketan for your reply. Also thatnx for given details. actually I have tried so many time with 474 400 volt cap. and 10uf 50 volt cap. but the problem is the capacitor (10uf) become too much hot. I connected 15k ohm resistor from 10 uf cap to LED line. when I on the main then 15 k resistor burn immediately. I will try to draw the circuit. please help on that..</p><p>Thanx..</p>
<p>i would suggest you dont waste your time with caps and resistors that are not rated for AC mains. Change them, since they are all almost of the same price!</p><p>Your resistor should be rated for at least 3 watts (even your 15kilo ohm) so that it does not burn. </p><p>just raise your competence, to meet your aspirations and learn from other peoples' experiences. you will find that the above rated capacitors are required for simple and long lasting circuits. </p><p>pl also see my other i'bles - for many types of LED projects. </p>
<p>Thanx again for your kind reply.. every time I tried to learn from other circuit design. like your project and Dipankar...etc. r u referring me some books or site.where from I learn in depth. that how its work and other components like resistor, capacitor, and some basic circuit design. actually my knowledge is not good about that. but I am very excited to learn in depth.</p><p>Thanx.. </p>
<p>hi,</p><p>I would like to make a led light for my room. Can you provide me with a circuit diagram. The way you described the circuit is bit of confusion for me. And also need to know the power consumption of this circuit? My mail id logicmania[at]gmail.com</p>
<p>kindly check projects made by &quot;Dipankar&quot; on this website for some very nice circuit diagrams as well as pics. He is guiding light for all of us! ;-)</p><p>reg</p>
<p>can I use. 0.33uf 630v cap for 220v input?</p>
<p>so nice ......................</p>
Your work is quite good but u need to focus on covering and branding the finished product. I guess this is just a concept one? Right?
Haha tx! I guess 'some' people can never improve their presentation skills! <br>;-)

About This Instructable



Bio: "May the good belong to all the people in the world. May the rulers go by the path of justice. May the best of men ... More »
More by pandyaketan:Single LED on AC Mains Kids Wanting Six Pack Abs Cure Diabetes With Water Therapy 
Add instructable to: