Intro: Mysterious Lightbulb Prank
Step 1: What You Need...
1. (2) ordinary lightbulbs - the older the better.
2. (2) CR2032 Button Cell Batteres
3. 1 High Intensity White LED
Step 2: Tools Needed...
1. Soldering iron/station
3. Knife or X-Acto
4. Work gloves
5. Needle nose pliers
6. Hot Glue gun
Step 3: Step 1
Put on your work gloves and start to gently work the lightbulb base back and forth. After some patience the base should come loose from the bulb. If you are lucky, the bulb will come loose cleanly. In my case it didn't so I salvaged the base and removed the excess old glue.
Step 4: Step 2
On the second bulb, I cut away a small edge of the base. Just enough to grab it with needle nose pliers and start 'unwrapping' the base from the bulb. Shen I was done I ended up with a clean glass bulb.
Step 5: Wire It Up...
After zip tying both batteries together, solder one wire to the lightbulb base in the center. Solder one wire to the edge of the base. There should be two nice globs of solder already there that you can use. Then solder one wire to each of the LED leads. Take note as to which one is positive (the longer lead). Then attach the positive wire to the + side of the battery pack by slipping it under the zip tie. Do the same for the negative wire.
Step 6: Put It Back Together...
Now drop the battery pack inside the base of the lightbulb and insert the LED into the empty part of the lightbulb. I had to break away the smaller glass shaft that runs inside the bulb to make room for the LED. Make it nice and snug and then I used some hot glue to seal the base to the bulb.
Step 7: Try It Out!
You can use a small piece of wire concealed in your hand to make contact between the base bottom and the side to activate the LED. I made it work by using my ring. When you hand it to someone it goes out! You can also ask someone to pick it up and hand it to you and then when you grab it, light it up! They'll never figure it out! NOTE: Be sure to not mix up this modified lightbulb with a real because plugging it in to 120 volts will cause some serious smoke and other potential hazards. Have fun, be safe!