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Led light bulb uk Answered

Hi , I wounded if any body would be able to help me out? I have been give a few led chip, all 10w 12v 900ma, have seen people make or replace lights in there house with 1-3w bulbs , but mostly there also in the us :(, and wounded if anyone could give me some light guided help   I live in the uk and would like to light my house on these if pos so if the first works ill have to make 9 more at least to change all my bulbs lol cheers and thanks :)

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mpilchfamily

4 years ago

You will need to find a 10W driver for the LEDs. If you can find one that runs off mains power than great. If not then you'll need to find an adapter that will supply the DC voltage needed. I doubt you'll be able to cram this into the size of a conventinal bulb and use it as a replacement. You can still build a custom light fixture with it.

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Xxxdvxxxmpilchfamily

Reply 4 years ago

I've found a web page that tell me how to make a transfromless power supply but I'm not sure on the output on amps or watts the power supple is on this page http://www.electronicecircuits.com/electronic-circuits/transformerless-power-supply andy one got any ideas if i could use it as it seams small either to use :) cheers dave ps image is the power supply i was talking about and parts it say to use

image.jpgimage.jpgimage.jpgimage.jpg
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mpilchfamilyXxxdvxxx

Reply 4 years ago

The output varies based on the resistors used and the resistors used limit the current. Problem with this design is it will require high power wire wound resistors. Both costly and bulky. Making it larger than your typical PSU with a transformer. Also massive heat will be generated int he resistors and it will require a cooling fan. This also means it is a vary inefficient PSU.

Resistors like these:

http://www.mouser.com/ProductDetail/Arcol/HS10-10K...

You may even have to go higher than 10W resisters. While they have a heat sync built in they will still need to be attached to a larger heat sync or heat spreader. I've worked with these before building a custom PSU load tester rig. My avatar is a picture of the build.

Find and buy the correct drivers for the LEDs. Don't try to build your own PSU for them. Otherwise you'll just be wasting your time, money, and the LEDs.

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Xxxdvxxxmpilchfamily

Reply 4 years ago

Ok sorry to keep going on but I'm looking in to drivers then etc and am lost to say the least :O ie i no i need a couple of drivers but buck , boost flyback etc... Lol and the how would be best for the lights I'm goin with four LEDs for each bulb so should i go 12v 24v or 48v ie ser/parel and one last question all the drivers i seam to find never seam to be 240v input more like 12-50v :S LEDs in question are still 10w12v900ma cheers for your time dave :)

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mpilchfamilyXxxdvxxx

Reply 4 years ago

You'll need an adapter to take the 240VAC and covert it to the DC voltage needed by your driver. Needless to say you're not likely to make this into a decent looking incandescent bulb replacement. You can make a custom lamp with them but don't expect to put it all into a bulb sized package.