It's a great prank to play on friends/colleagues/family when you get a chance to swap out their drink for your rigged one!
I tried to make this ible as simple as possible to make it accessible to as many people as possible. Where I could I taped instead of soldered. Info in the steps should be transferable to most other noise making toys!
- drinks can
- toy that laughs
- tilt switch
- electrical tape
- wire strippers
- soldering iron
- punch or nail
- hacksaw blade or scissors
Step 1: Opening Up the Can
With a punch or nail, pierce the bottom of the coke can. Wiggle it until the hole is wide enough to insert a hacksaw blade.
Gripping the hacksaw blade in the pliers (or your fingers if you're hardcore), cut a slit. Cut two more slits so the bottom of the can is divided into six. Once the hole is larger, using a strong pair of scissors may be easier than the hacksaw blade.
Carefully push the six tabs inwards to make a hole. Dividing the bottom of the can more is better, it will cause the rim to bend less and your can won't wobble then.
Step 2: Canibalise
Step 3: Power
Having checked it still works, detach the batteries.
Step 4: Installing the Tilt Switch
The circuit is completed when the current flows across the interlocking lines. Soldering the contact switch either side of this will complete the circuit when the tilt switch is.... well... tilted!
Use some helping hands (not a friend, it will get hot!) to keep the tilt switch in the correct position while you solder it on. Be careful not to get solder across the contacts!
Step 5: Add a Toggle Switch
I cut the positive wire in half and soldered in the switch. Adding some electrical tape around the contacts will stop them shorting out against each other.
Tape it to the board so that when inserted into the can it can be accessed from the hole in the bottom.
Step 6: Add the Batteries
The magnet in the speaker should hold it conveniently to the batteries on the end that the tilt switch is located so that it's pointing upwards towards the drinking hole.
Add double sided tape to the back of the batteries and insert through the hole in the bottom of the can. Stick it to the wall opposite from the drinking hole, then as your victim picks up the can and tilts it towards them the can will laugh/howl manically at them!
Step 7: Operation (& Prizes)
When they leave their desk/room to do something, quickly swap out their real can of soft drink for your rigged one. Turn it on and..... wait. If you're mean, drink their real can.
When they return and take an unsuspecting swig, the can will burst out laughing, hopefully causing them a fright or to drop it.
I'm offering a cookie patch to the first three people to post a picture of the innards of their prank can and a video of it in operation on their unsuspecting victim (no fakes please!). You'll also get a mention edited into this step with a link to your video.