Make a cat burglar that "steals" left over joules from used batteries. When the cat burglar gets his little paws on a battery his LED nose lights up until all the joules are gone. When drained, recycle the battery. You'll sleep more soundly knowing your batteries are completely dead.
It takes a thief to make a thief. I "stole" two Weekend Projects from Makezine
and combined them into one. The Sympathy Doll and the famous Joule Thief. (BTW-Is anyone else having Weekend Project withdrawal symptoms since Bre moved to Etsy? I'm having bedwetting symptoms.)
What's a Joule Thief? A Joule Thief is a simple circuit that uses the last amount of energy (a joule) in a used battery. In essence, it's a battery drainer. It's a great little project by itself.
I'd like to give a "shout out" to others that have I've stolen from, er I mean, have inspired me.http://blog.makezine.com/archive/2008/01/led_softie.htmlhttp://www.emanator.demon.co.uk/bigclive/joule.htm
This is a pretty easy Instructable. If you ignore family and food, you can do this in one day. "Sorry, Daddy can't help you with that broken arm; he's trying to MAKE something. Go ask Mommy to set it for you."
You can put this project together with basic tools:
Embroidery Needle and Thread
Heat gun or matches
Solid Core Ferrite Suppressors - Mouser - PN 875-28B0500-100 - $0.18
26 awg wire - Frys - $2.99/roll
Transistor - Mouser - PN 610-2N3904 - $0.10
White LED 10,000 mcd - Frys - $3.49
Resistor 1/4 watt - Frys - $0.95 4 Pack
Conductive Fabric "Zelt" - Less EMF http://www.lessemf.com/fabric.html
Pieces of gray and pink felt - Michaels - $0.20/sheet
Black fleece - JoAnne Fabric - $4.99/yd.
Googlee eyes - Michaels - $0.89/Pack
2 small strong magnets
Foam rubber or other stuffing
Box of Cap'n Crunch
I swear I put this project together before the "Get the LED Out Contest." It just happens to be great timing because I need to win that t-shirt. I'm actually writing this topless and it's really cold where I'm at. So please leave me a good rating.