Introduction: DIY Home Made 6W LED Bulb

My objective with this project was to create a low cost energy saving LED bulb for slum areas. Energy saving bulbs are expensive here in Pakistan. Chinese bulbs rating 5 to 7 Watts costs around 6 to 8 US$ which are not affordable for lower middle class families.

So I started working on a LED bulb but the problem is I was not able to get housing for that so I started searching for housing, an old energy server's housing was enough for me but unfortunately I wont be able to find one for myself as shopkeepers in electronics market told me that only housings are not available you have to purchase complete energy saver.

So the to resolve first problem I was searching something so it can be used for wide production because I can make a bulb with any faulty energy saver or some old LED emergency light kind of stuff. 

Therefore I have decided to make the housing by myself, I have purchased one Adapter for bulb holder and one single switch plastic box for that purpose.

I cut the box from the back side and inserted the adapter into it, so it looks likes the energy saver housing. after that I have fixed the adapter via adhesive 




Step 1: LED Bulb Circuit

The circuit is consists of very few parts, just one resistor , two capacitors, four diodes and six high bright 1W LEDs. I have constructed circuit without any PCB. Just twisted components with each other and sold them to make the bulb work.

Step 2: Construct LED Bulb

After your circuit is ready, just sold LEDs over silver 6 LED plate in series, these plates are available in market easily. After soldering the LEDs to LED Plate (that uses as heat sink for LEDs). Now connect the terminals with circuit and screw the box.

That's it , your bulb is ready to light.

Step 3:

Just take care this circuit works with direct mains so there is huge risk of electric shock therefore avoid direct contact when testing it with mains. In one of the picture.

I have shown a picture  which is taken without any flash and bulb is producing enough light to light-up the room. 

Comments

author
akagrawal306 (author)2016-07-11

Hi! I want to replace a 40w florescent tube light in my kitchen with more or same amount of light as the tube rod from 220v AC. kindly enlighten my way.

author
cal287 (author)2013-12-20

Pretty cool! Creative and effective, good job!

author
Creatives360 (author)cal2872013-12-21

Thanks for the compliment :)

author
tineshsg (author)Creatives3602016-05-06

what we need to change for 3 leds

author
AshishM55 (author)2016-04-05

How nany costly this blub

author
JayeshC2 (author)2016-04-02

How nany costly this blub

author
MaddyK2 (author)2016-02-01

sir i have made this circuit but it is providing more than 400 v showing on multimeter which are too much for leds how can i reduce voltages? i have used 5.6 uf capaciter

16, 1:26 AM.jpg16, 1:26 AM.jpg16, 1:28 AM.jpg16, 1:26 AM.jpg16, 1:28 AM.jpg
author
AmitK48 (author)2015-10-01

will this circuit work if i replace LEDs with 6w tube light?

if not what changes has to be made????

author
Kapil66 (author)2015-09-25

How much life of this circuit how many years

author
Kapil66 (author)2015-09-25

Can we think it will work for 2 years more or we can any other add in circuit advise us thx

author
AndrewK85 (author)2015-04-24

Hi there, I just got a question, don't you need a step down transformer?

author
Creatives360 (author)AndrewK852015-09-21

Hi
No you don't need a step down transformer
Thanks and best regards
Faraz Ahmed

author
Creatives360 (author)AndrewK852015-06-30

No we dont need a transformer as all the work is done by capacitor based power supply

author
aahmad30 (author)2015-03-12

Ecxelent Work bro. Keep it up.

author
RanjanS1 (author)aahmad302015-08-05

Realy it work with full bright ness?

author
RanjanS1 (author)aahmad302015-08-04

Is it work with 6 or10 1w led with full brightness perfectly?pls reply sir

author
RanjanS1 (author)2015-08-04

Sir whate is the out put curcuit current and voltage?1 w led need 350ma current.so is this capacitor sufficent for 1w led?because i know 155j cap produce less than 100ma current.pls sir reply me

author
RanjanS1 (author)2015-08-04

A

author
robinhoodxx (author)2015-03-29

can we use 7 or 10 or how many more 1watt led,s in same circuit.or what change we should made to make 15 leds bulbplz, make 15 leds circuit

author
Creatives360 (author)robinhoodxx2015-06-30

You dont need to change circuit for 10 to 12 LEDs

author
ThakurR (author)2015-06-06

Hi, I am in need of a circuit, uses 50 nos. of 1w SMD leds (350mA / 3.5v) with AC 230V, I searched everywhere, I could not find this circuit. Can you help pl.

Email id : cisco.abhi@gmail.com
Thank you, Rgs Abhishek

author
ThakurR (author)2015-06-06

Hi, I am in need of a circuit, uses 50 nos. 1w SMD leds (350mA / 3.5v) with AV 230V, I searched everywhere, I could not find this circuit. Can you help pl.

Email id : cisco.abhi@gmail.com
Thank you, Rgs Abhishek

author
jeialpho (author)2015-05-29

very good thanks for the information

author
robinhoodxx (author)2015-01-15

sir

Creatives360

.
what we call 100 R 3w.

is it (100 ohm resistor of 3 watt )

and if 100 ohm resistor of 2 watt connected with

100 ohm resistor of 1 watt is it = 100 ohm resistor of 3 watt

plz explain..

author
Lucif3r945 (author)robinhoodxx2015-03-11

100R 3W is simply a 100ohm 3 watt resistor.

Using multiple resistors is a bit tricky.

If you put 2 in series, the resistance will be added together, e.g 100ohm+100ohm=200ohm, 100ohm+300ohm=400ohm etc. The power dissipation (wattage) will not change.

Now, if you instead put them in parallel, the dissipation will be added, e.g. 2 3W resistors would become equal to one 6W, BUT! The resistance will be reduced! e.g. 2x100ohm resistors in parallel will become 50ohm, 3x100ohm would become ~33ohm etc etc. So since putting 2x100ohm 3W would be equal to 1x50ohm 6W, you would need to add another 2 100ohm 3W in series with the parallel ones, bringing the resistance back to 100ohm while keeping the 6W dissipation.

Unfortunately, I am not good enough to explain mixing different values in parallel(like, 1x100ohm 2W and 1x50ohm 1W), which complicates things further(Im sure theres a formula to calculate it somewhere).

So in your case, I would go with 2x200ohm 2W resistors in parallel, which would equal 1x100ohm 4W resistor. Having a bit of headroom with the dissipation is nice should there be a powerspike etc.

author
robinhoodxx (author)Lucif3r9452015-03-29

thanx for reply

Lucif3r945

author
robinhoodxx (author)robinhoodxx2015-03-29

can we use 7 or 10 or how many more 1watt led,s in same circuit.or what change we should made.

author
divudi2 (author)2014-04-04

I have made this lamp with 4 nos of led, but withine 5 minutes, register get hot and burnt.

author
Creatives360 (author)divudi22015-03-11

I have build same circuit with single LED but instead of 100R increase value to 330R

author
turbiny (author)2014-09-10

Add on/off switch

author
Creatives360 (author)turbiny2015-03-11

It will be fitted into normal electric holder so normal electric holder already have a switch.

author
bhvm (author)2014-05-13

simple and practical but please use constant current sources with high power leds. resistors are ok for toys or 5mm Led but not for this.

author
rwijitharathna (author)2014-04-15

please give me a reply for this question ASAP,my email ransarawijitha@gmail.com

If I use normal strw hat LEDs how should I connect them in to the circuit??How much there should be in a row?? What is the maximum number>??

]

I like your post very much

author
The Freak (author)2014-04-03

I guess R1 and C1 give rise to a certain voltage and amperage output, how is this calculated?

author
hamidsaeed (author)2014-01-25

This is a very good job sir,,, can i contect with you on cell..?

author
recuat (author)2013-12-24

Your resistor is 3W but your current draw is 6W LED, the resistor will burn off easily. My one already burn off what about your???

author
Creatives360 (author)recuat2013-12-25

The bulbs are connected in series, therefore total current is 1W and for 1W current 3W resistor is much sufficient. If you have build the circuit I have mentioned I guarantee you it will not burn out. I have 6 similar bulbs in my home and all are working perfectly fine with daily usage of 8 to 12 hours.

author
ericCycles (author)Creatives3602014-01-13

It's a clever idea I may have to borrow for some led lights in my greenhouse.

A few thoughts:

1) Capacitance is measured in Farads. Some googling suggests C1 is 5uF based on that 155J label.
2) The heat produced by R1 = the current flow * the voltage across it. You should be able to measure both with a multimeter if you have one. That would answer the question of what wattage R1 needed to be.

author
Creatives360 (author)recuat2013-12-25

I think you haven't constructed same circuit which I have given above, because selecting the wrong value of capacitor will pass out large amount of current and in that way may be resister will blow up, but the circuit I have given above is working fine and even resister wont heat up.

author
recuat (author)Creatives3602013-12-26

I use to open for at least 6 hours at night for 5 day only, then blown off

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