Picture of Desk Bell That Plays Sound Effect

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. 
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Step 1: Materials

Picture of Materials
Here are the tools and materials that you will need for this project:

Desk Bell
Sound Modules from a Toy 
Scrap Plastic
3V Lithium Button Cell Battery
Electrical Tape

Wire Strippers
Soldering Iron and Solder
Wire Cutters
Hot Glue Gun and Hot Glue

Step 2: Select a Sound Module

Picture of Select a Sound Module
The first thing that you need for this project is a good sound module. This can be any small circuit that plays music or sound effects. Toys are a good source for this. If you don't have any sound making toys, you can easily find them at a thrift store. You will probably just need to replace the batteries.

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.

Step 3: Remove the Sound Module From its Housing

Picture of Remove the Sound Module From its Housing
Unscrew the outer housing of the module and open it up. Then unscrew the sound module parts from the inside housing. The speaker is often glued in place. Use a sharp knife to carefully cut through the glue around the outside of the speaker. Then gently pry it loose with a small screw driver.
Eh Lie Us!1 year ago

Perfect for the Administrative Professionals Day (US)!

Lakes571 year ago

Where did you get that style of desk bell from?

DIY Hacks and How Tos (author)  Lakes571 year ago
It came from the card game PIT.

yeah, i'd like to know as well. i've never seen one like that.

danny3xd1 year ago

That is just too cool!

Now I gotta find a toy with Lurch answering the gong. LOL http://wavcentral.com/sounds/televis/addams/afrang...

Or maybe one of those recordable greeting cards?

Really, really awesome Instructable and thanks for posting!

Farid0071 year ago
this is a great idea and it's easy to make