This is an instructable on how to make a flashlight out of a ChapStick tube. After reading up on multiple LED instructables I thought it would be neat to make an original design that had not been done before. Since button cell batteries can be expensive, I went with an A23 (12V) battery that cost less than $2.00 for two.
Step 1: What you'll need:
A23 Battery (12V)
10mm White LED (28,500mcd, 20mA, 3.5V)
Heat Shrink Tubing
"N" Battery Holder
Step 2: Soldering the LED & resistor
Cut the negative lead of the LED to 1/4" and solder the resistor to it. Shrink some heat shrink tubing over it and put both leads through the top of the ChapStick platform.
Step 3: Completing the top section
Cut the spring from the "N" battery holder (leaving the plastic portion it's attached to intact), and cut a 1/4" section from the bottom portion of the ChapStick. Insert the 1/4" section into the bottom of the platform, (this will help to make the base of the spring more stable. Slide the positive lead of the LED through the center of the spring, solder it to the base of the spring and then clip any remaining portion of the lead off.
Step 4: The switch
Cut a square in the bottom portion large enough to put the tactile switch through. Position the switch to where the button sticks out just slightly past the bottom. After it's in place, J-B Weld the back side (the portion that goes up into the tube). After the J-B Weld dries, you can trim it up with a razor blade.