Dear

Really i am a fresher, But interested in LED based circuit,

Please any body can help me to make a simple and lasting driver circuit for making LED lamp 10W/11W/12W

These are available in market , but i need to make myself if i can

My facilities are

1, 1W LED as per reqired voltage
2, 230V input

Thankx in advance

 

Hello,

A led driver is a constant current source.
For 1 Watt leds, you will probably need a 350 mA source.
Here is an example of a commercialy available led driver:
http://www.digikey.com/scripts/dkse...wproducts=0&ptm=0&fid=0&quantity=0&PV1471=129

Bertus

 

Hi,

If you want to try to do something a little cheaper, you can always use a transformer and a diode bridge to make your own 12V supply. Something like the attached should work. The part numbers in my schematic aren't indicative of what you'd need. You need to be very careful specifying your parts correctly so that you don't hurt yourself or your house wiring.

 

So, are you thinking of using 10-12 1 watt LED's ?

As Bertus said use a constant current driver, and you will need heat sinks.

Do you have a particular LED in mind?

 

I have a question about 3 watt star leds I bought from ebay
Running 3 of these in series

http://www.ebay.com/itm/10-pcs-Cool...560?pt=LH_DefaultDomain_0&hash=item4ac2f82278

Powered from this

http://www.ebay.com/itm/27109472565...eName=STRK:MEWNX:IT&_trksid=p3984.m1439.l2649

I tested the current draw and its about 250mA

When I test it from a 12v 1000mA wallwort the leds run warm to a bit hot
but when I test on a 12v 12ah SLA battery they run REALLY hot, why the difference I thought the LED driver set the current