Instructables
Picture of Led Earring
Do you like nightlife? This instructable tells you all you need to assemble LED earrings, including the instructions to make a transparent battery holder. The battery holder has an ON/OFF switch so you can turn the earring off to save on battery life.
This instructable requires medium capacity skills. Soldering is not needed.  Battery life :  approximately 20 hours

 
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Step 1: What you'll need - Materials

Picture of What you'll need - Materials
  1   Battery, non rechargeable, 3 volt,   lithium CR 2032                   

  1   Neodymium raw magnet,  diameter 6 mm, height 2 mm NdFeB, N45
        you can find it here www.supermagnete.it/eng/
 
  2   Neodymium raw magnet,  diameter 3 mm, height 3 mm NdFeB, N45 
        you can find it here www.supermagnete.it/eng/
 
  1   Screw M2x6 , inox    
        you can find it here www.ebay.com
 
  1   French Ear wire
        you can find it here www.ebay.com
 
  1   Jump ring light diameter 5mm  
        you can find it here www.ebay.com
 
  1   Small piece of plexiglas sheet , thickness 5 mm

10   cm of coloured ribbon like shoe lace
 
  1   small piece of Aluminum bar 30 x 30 mm  
        you can find it here www.item24.com/
 
  1   High Bright LED 3mm    7150 mcd   3.2V    20mA typ.   item# 751-1502-ND  
        you can find it here /www.digikey.com/


or you can buy all components in a kit here http://www.plugandwear.com/default.asp?mod=product&cat_id=96&product_id=253

or you can buy the earrings ready to wear here  http://www.blomming.com/mm/aisidream/items/led-earring



Step 2: What you'll need - Tools

Picture of What you'll need - Tools

Step 3: Battery holder - Sketch

Picture of Battery holder - Sketch
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- print the drawing of the battery holder with a 1:1 ratio

- attach the drawing to the plexiglas sheet using a small piece of double sided adhesive tape

- mark the plexiglas sheet  in correspondence of  the five X  using a pin and a hammer

Step 4: Battery holder - cutting

Picture of Battery holder - cutting
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- drill the holes of diameter 1.2 , 3 and 5.7 mm as described in the drawing

- make a countersink of diameter 18 mm depth 4mm inserting the pilot in the center hole

- make a countersink of diameter 20 mm depth 2mm inserting the pilot in the center hole

- cut  the battery holder using a  29mm hole saw inserting the bit in the center hole. IMPORTANT: be sure that the internal diameter of the hole saw is at least 25mm
bhvm1 year ago
Perfect Gift for a techie Wife!
Very good instructable.
Congrats on being a finalist!
Beautiful!
rinkishimo1 year ago
nice project, i like that idea of using magnet as contacts and switch ;)
jtechian1 year ago
Instead of the white led, get some rgb 2 pin color changing ones. Rest would be same.
You can get them cheap on Ebay.
Lorenzo M (author)  jtechian1 year ago
I will test them asap Thanks !!!
lbateman11 year ago
Hi Lorenzo.
You may may need a current limiting resistor in your circuit depending on the forward voltage of your LED. eg. Some LEDs have a forward voltage of 2v. You LED probabbly needs about 2mA for nice night glow, so you would use (3v-2v)/2mA= 500Ohms (470 Ohms would be close enough). Some blue and white LEDs have a much higher forward voltage and either not work, or not bneed the series current limiting resistor.
this is awesome!
Lorenzo M (author)  andrea biffi1 year ago
thanks !!
apeace21 year ago
I want to see the schematic diagram of this,please
Lorenzo M (author)  apeace21 year ago

the shematic diagram of the led earring is the following

schematic diagram.jpg
never seen anyone use 8020 for accessories before!
turbonegro1 year ago
How i would love to have a 3d printer im full of ideas but low on funding
Clean and elegant. Love it!
die potato1 year ago
At first I thought it said lead earrings, ouch!
Sam DeRose1 year ago
I can't stop giggling to myself, I love this so much! Cant wait to to try it, maybe with different color LEDs. I absolutely love the incorporation of the 80-20 aluminum bar slice.
momoluv1 year ago
This looks REALLY HARD! Is it?
rmarchesi1 year ago
Very good project!
Oh, those are fun, I'm glad you added in the ribbon, really makes it stand out :D