Light Bulb (World's Best) using wire connector & no Soldering !!!

Make an led light bulb - without soldering !!

Step 1 Parts

What you need is - 4 leds, one 10k 1/2 watt resistor, one 0.22 uF 400 volt capacitor and one wire connector !!

This runs on 230v AC. For 110v AC, change the capacitor values (to 0.47 uF, 250 volts).

Warning: This involves AC Mains ! Do not attempt, unless proficient.

Comments

[Maqsood.a]

Nice lamp. Have couple of doubts.
1) Which led's you u used?
2) If i keep it whole night how long the led losts?
Provide the diagram of led connection
I hade made one LED lamp where i used 19 led's, if i keep it on for 8 to 10 hrs after a couple of weeks led brightness will go it becomes very dull need to replace the whole led set. Please suggest wat need to be done to keep its brightness for longer time

[pandyaketan]

Thank you.

1) 5 mm white-green leds of 3.2v & 20 millliamp rating - the normal ones.
2) i use it everyday for 8 hours as night light, no damage to led or the lumen.
3) It is so simple, what diagram u require for 4 leds, if u yourself have made a 19 led bulb !!???

Connect a positive leg of one led to a negative leg of another. This is one pair of 2 leds. Make as many pairs as you wish upto 14.

The way forward, without getting into your erroneous bulb, is to discard it altogether and make one like this one (?)

Hope it helps...

reg
ketan

[Maqsood.a]

Thanks for ur prompt reply, i used 5mm doom leds of 3.2 - 3.4 20 milliamp rating.
I connected same in series ( connecting +ve leg to -ve even though the same problem need to change led's after 2 weeks of daily 5hrs use. I used 474k-400volts non polarity capacitor and1meg 1/4 watt resistor to drop voltage and 160v 47 uf polarity capicator. i tried by increasing resistor value also but in vain the led lumen will come down and last only for a couple of weeks.
I'm i doing any mistake? can u suggest me in this, i really looking for power efficiency.

[Juxe]

The reason LEDs do not last long is because of fluctuation in current and heat during extended use. Using a current-controlling (constant current) circuit will vastly increase LED life. LEDs produce heat, and when they do, the temperature change will cause their resistance and luminance to change. Using a voltage-controlling (constant voltage) circuit to power LEDs and limiting current with resistors will waste power in the resistor and allow the current to fluctuate, reducing the LED life. Most LEDs with controlled current should last 50k-100k hours, or whatever they are rated for.

[pandyaketan]

True, but LED specs are out of context.

An LED, by itself cannot be directly connected to a 110VAC or 220VAC supply. it will burst, doesn't matter if it is designed for 50k or 100k hrs. it is designed to take 3volts only.

You have to understand - the circuit assembly becomes important to get the life it is designed for.

Any capacitor will not do. Any resistor will not do. The specs suggested here are "robust" for the lamp, full stop.

reg
ketan

[pandyaketan]

Dear Maqsood,

Why are you using just any capacitor!!???

1. Pl see the capacitor in the pic - the orange one. it is 0.22 uF (micro Faraday, not KF!!!) with 400 volt rating. I think it is made by Phillips company.

capacitor reduces the voltage from 230VAC to below 3V required by the LED. Higher rating will release more current and damage the LEDs.

2. I also dont understand why u use the polarized cap!!

3. Your wattage rating rating of 1/4 for the resistor is also wrong! it should be atleast 1/2 and better still 1k. Else it will give out smoke, burnout and also burn the leds.

You are lucky not to have caused an accident. Pl ensure that your knowledge always surpasses your enthusiasm! ;-D

reg
ketan
__________
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May the rulers go by the path of justice.
May the best of men and their source always prove to be a blessing.
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[Maqsood.a]

Dear Ketan
Thanks for ur input. I Purchased the cap!! i asked for 0.22uf 400v instead he gave me 224 J 400v and said both are same. Is both cap value same can i use it?

[lansang]

can i use a 600V .22uF capacitor instead? will that change anything?

[pandyaketan]

A 600 volt rating indicates that it can take higher loads safely. so i guess it should not be a problem...check it by putting it in your calculation sheets...

reg
ketan

[BobS]

Perhaps someone can explain why a 22/ 47 uF capacitor can be used instead of resistors. I have even seen a schematic somewhere with lots of LEDs, parralel in both directions... What's the magic behind this?

[pandyaketan]

magicians never tell !! (about the voltage drop from 230v ac to 3 v by the 0.22 uF or from 110vac by the 0.47)

;-D

reg
k10

[ray_Bond]

Its really bad to tell the half truth about " how to get these values of capacitor and resistors " so i give this information so that peoples can use and make their own coustom led for light setting this is the image info about AC light values with example. those who want to make any good led lights can use this formula and principle.

[pandyaketan]

Very Good, Keep it up. But as you can see, my ckt is slightly different. Pl read again.

[Dipankar]

You could keep the Resistor, Capacitor and wire connector in side a small plastic container so that it looks GOOD.
Open connection are always dangerous, a lizard can short circuit the connections.

[pandyaketan]

It is an honour to receive valuable guidance from "the LED Man" himself, sirji ! I will find an old pepsi bottle for covering !

Now for the joke ! Think of it as a lizard repellent ! Haha
reg
ketan