Introduction: LED It Sleep

Picture of LED It Sleep

Hi,this instructable is usefull when you get uot of bed in the middle of the night to visite the bathroom or the kitchen but you do not want to wake everyone up by turning on the lights.So what do you do?"LED it sleep" is what you need!(many thanks to PixLix for the name).
Sleepers with leds..

Step 1: Leds and Batteries

Picture of Leds and Batteries

Well sorry for not having a detailed photo but it is easy to do.3AAA batteries soldered in series,negative to possitive pole, and 2 white leds in parallel.negative to negative lead and possitive to possitive.this way there is no need for resistors.A! don't forget a swich glued on the battery pack.I used an old one I had removed from some junk appliance-never throw staff like that away.I taped the pack and switch together.It looks like that.

Step 2: Putting in Sleeper

Picture of Putting in Sleeper

Then is fitting.I used my funny looking winter sleepers for 2 reasons. Because they are big enough to hold the batteries and because they look really funny with leds is the deer's nosils!Anyway, I turned it inside out and cut some stitchs to make a hole, found the nose where I wanted to place my leds, made 2 holes and hotglued then in place.I placed the batteries in and sew it back again.I made sure that when you fiddle around on the outside I could find the batteries and use the switch.
In the picture you can see the stuffing it has.

Step 3: Led Sleepers Finished

Picture of Led Sleepers Finished

Turn then sleeper outside-in and find the switch to turn it on.This is it..
I have no night shots but you know how bright the leds are.
The only problem is that the leds are a little "crosseyed"..something to improve the next time..

Comments

gamer (author)2007-08-20

nice idea but... first of all, you should put resistors, one on each led, because a white led is made for 3.3 volts at 20 miliamps. the leds are getting 4.5 volts, and putting them in parallel is even worse, because the leds slowly get badder and eventually, one of them cant handel it anymore, then it burns, and all the power goes into the other one, and boom, then you have a useless pair of burnt leds, and the way to keep that from happening, is to put resistors. second of all, soldering onto the batteries is very bad for the batteries. nice idea, but could be improved. -gamer

dickiejoe (author)gamer2009-10-15

hers a great site for calculating what resistors to use with your leds :)

http://ledcalculator.net/

mastelios (author)gamer2007-08-20

Yes I know its not the best thing to solder batteries but I didn't mind killing them.Aclually the white leds need 4 volts and can handle the 4.5 volts.I use this setup enough,and if the leds are not on for hours you are ok.In series the batteries wouldn't have enough power to drive them.

mastelios (author)mastelios2007-08-20

By the way,when you use leds in parallel with resistors,why should you use one in each led?I've seen it but don't understand it.

gamer (author)mastelios2007-08-21

leds, like i said in my last comment, need 3.3 volts, i dont know why you say that they need 4 volts.putting them in parallel is even worse, because the leds slowly get badder and eventually, one of them cant handel it anymore, then it burns, and all the power goes into the other one, and boom, then you have a useless pair of burnt leds. basicly, each led needs their own, calculated resistor. and i never said to put them in series,

mastelios (author)gamer2007-08-22

It was on the specs of the leds i bought.on 3v there are barely visible, 3.5-4 are bright enough so I went for 3 batteries for simplicity.I agree they would not last but I didn't really mind.That's why I soldered the batteries.Also this site mentions 3 to 4 volts for blue and white leds and what you say about leds in parallel.
http://www.kpsec.freeuk.com/components/led.htm
Quick question:if you go for 3x1.2v bateries,NiCa its 3.6v total,what resistor?about 10 Ohms?

imarzouka (author)mastelios2008-08-23

I agree with gamer about adding the resistors. Here is a calculator that will help you calculate the resistor values you will need based on the LED specs you have.

http://ledcalculator.net

gamer (author)mastelios2007-08-22

to calculate the resistor, you need to take the voltage of the batteries, take away the voltage of the led(s), then you need to multiply by the amperage, so for white leds that work with 3.3 volts @ .020 amps, you would do the following, 3.6 volts (minus) 3.3 volts (times) 0.020. the answer would be 0.006 ohms, each led would need a resistor of 0.006 ohms. - gamer

silicon_oddity (author)gamer2008-01-11

Just a quick correction on the math. E = I * R, so to get the proper resistor, one would do the following (3.6v - 3.3v) / .020A to get resistance. In this case, the proper resistor would be 15 ohms or the next highest regular value which can be purchased. Hope that helps!

gamer (author)gamer2007-08-22

i checked out the web site, they say usually 2 volts, and 4 volts for white and blue. leds are usually 1.8 volta, and 3.3 volts for white and blue. put your white leds on 20 mA, they are leds, leds work with amperage, not voltage, even the web site you posted confirms that. - gamer

thefunktopus (author)2008-04-24

shouldn't it be slippers?

Fast Eddie (author)2007-10-05

Great idea! These will make a great gift for my insomniac girlfriend ;) (Also Im not sure where you are located, but around here, we call them "Slippers" not "Sleepers" :) It just made it hard to find when I tried to come back and searched for LED SLIPPERS good work!

mastelios (author)Fast Eddie2007-10-08

Thanks, (around here we call them "παντόφλες" <-Greek, so you would excuse my mistake :)) as for the girlfriend you mentioned, I have made for mine, a ring with smd leds from my old cell phone...think about it!!

BrianH (author)2007-08-20

Sorry to rain on your parade, but someone beat you to it...
(But it's fun to make stuff yourself anyway!)

I saw these in a department store once (Pennys or Macys I think)

They have a pressure sensitive switch to turn them on when in use,
and a light sensor - so they don't come on during the day.

http://www.brightfeetslippers.com/

mastelios (author)BrianH2007-08-20

Nice...i didn't know..anyway, i know mine are handmade lol

Kiteman (author)2007-08-20

If you use red LEDs, you will keep your night vision, and you could arrange a pressure switch in the heel, so that you don't have to fumble, semi-concious for the switch. That aside, this is an excellent idea.

Kevvixx (author)2007-08-20

That's a good idea. Very original

joemonkey (author)2007-08-20

why would we visite the bathroom? haha, just kidding! tthese are cool! i have some homer simpson slippers and im gonna put them in his eyes!

TheCrimsonBinome22 (author)2007-08-20

Hah, those are genius!

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