Most people are familiar with the classic desk bell. So when they press the button on top of the bell, they expect to hear a gentle ringing sound. They are not expecting to hear a bird chirping, gun fire or other sound effects. But that is what will happen if they press the button on this desk bell.
In this project, I am going to show you how to modify a desk bell so that it plays sound effects. It makes a fun little prank for your friends and coworkers.
Step 1: Materials
Sound Modules from a Toy
3V Lithium Button Cell Battery
Soldering Iron and Solder
Hot Glue Gun and Hot Glue
Step 2: Select a Sound Module
Ideally you want a sound module that keeps playing the full sound clip even after you release the play button. When you ring a normal desk bell, you quickly tap it. You don't hold it down. So if your sound module stops playing when you release the button, then it won't play long enough to be heard.
Another option is to use a recordable sound module. This would let you record your own sound clips.