Homemade LED ceiling light.

Why not make use of the stick-on battery powered LED lights that are made specifically for such things as power outages ? They are dirt cheap here in the UK, and seem to work quite well. I'm sure you could find something like a plastic plate to stick it to, in order to make your 'hanging basket' arrangement ??

Arfa

If you want a project to fill some empty time, that's as good as any. Do the math and make sure you understand how little light you'll be getting. If you just want a light that works in an emergency, go buy one of the small fluorescent under-counter lights. Or a flashlight If you wait for summer, there's one at every other garage sale for a buck or less.

If you have lots of extra cash to burn, buy a led flashlight. They make 'em with as many zillion lights as you want. And they're cheaper than buying leds in low quantity.

ledshoppe.com dealextreme.com

If your power goes out a lot, put rechargeables. Use Eneloop or some other vendor's hybrid NiMH so there'll be some chance it will still have some charge when you need it.

So, for wasting time and using up extra cash, a homemade led light works fine. And you can point to it and say, "hey, look what I can do."

If you want light, give it up and buy one. mike

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Return address is VALID!

Seconded. I bought a pack of three stick-on lights, each with five white LEDs, for less than $13 total (batteries included) at Costco.

snipped-for-privacy@webtv.net wrote in news:27539-479D20D2-834@storefull-

3253.bay.webtv.net:

Solar Powered flash-light using LEDs. bogolight (buy one give one--to someone who needs light)

[I have no connection with the project except I just bought one/gave one).

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bz

please pardon my infinite ignorance, the set-of-things-I-do-not-know is an 
infinite set.

bz+spr@ch100-5.chem.lsu.edu   remove ch100-5 to avoid spam trap

I have three little LED flashlights, one of them also has a little skinny flourascent light (not much thicker than a coathanger wire) running along the side of the flashlight.I also own six battery powered flourascent camp type lanterns, one of them is a Sears rechargable that I bought at the Goodwill store, but I don't have the adapter for the light.

I have several small inverters and a lot of Everyready AAA and AA and C cell and D cell rechargable batteries with two Eveready rechargers.If I plugged one of the battery rechargers into one of my inverters, (12 volt D C to 120 volt AC) and connect the inverter to the battery in my van, wouldn't that charge the batteries up ok? cuhulin

I found 'em at an 'everything's a dollar' store for...well, you know. Found some at wally-world being closed out; four for $3.something...including batteries.

The other day, I found an LED spotlight being closed out at Walgreen's for $3. It had a solar cell, three white LEDs, a charging circuit and two AA NiMHs.

Alas, there was only one....

jak

The "Dollar General" had some led flashlights for $4 sans batteries.

14 LEDs and 3 AAA batteries. It's the first light I reach for.

I agree, ledshoppe and dealextreme, both good sources for LEDs and flash lights. You may get a dud when buying hundreds of leds but that is rare. In 300 leds I had 4 bad ones from ledshoppe.

Ready made light for what the poster contemplates with 100+ degree beam spread.

It seems like a lot of work. I was going to install a bunch of LED ceiling pot lights, mostly in the kitchen. I was going to use X10 to control them. I found out X10 is not supposed to work with wall supplies and the light from normal LED's is too blue. Warm LED's are available now, so any light I install will have to be the warm type. They are also essential for art display lighting. The LED's I bought are 3 watt Luxeon for about $6 ea.

The LED lanterns and flashlight are so cheap, that you should reconsider. I d think its very nice to have a house emergency supply of ceiling and floor runners, as a backup, and you can even use them all the time as added convenience and styling using different colors.

greg

lights,

is

blue.

type.

watt Luxeon

Check out this site I saw in another NG.

It has a simple design to get the most out of the batteries. Lot's of other cool stuff on his site too. Just move up to the bigclive folder.

- Tim -

pot lights,

X10 is

too blue.

type.

watt Luxeon

That's a good schematic for a tiny voltage booster. I dates back to vacuum toobs and is called a "blocking oscillator." One application was the vertical oscillator in TV sets, another was audio code practice oscillator using a tapped audio output transformer.

This guy is talking about a large number of LEDs so it is interesting that you present that method. I use it as a boost converter for 3V circuits as a bias supply for turning on mosfets - open circuit they can put out upwards of 80 Volts with no load - so with some attention to raising the power a little it might work a large string of LEDs from a single 1.5 V cell.

No load, and it may destroy the transistor with the HV spike.