Record the sound effect that you think is most appropriate for your target. It can be a kitten mewing, glass breaking, or a train whistle. Be creative...
We all know someone who shakes their presents to try to figure out what's inside. This project is the perfect thing to give someone who does this. It's a box that plays prerecorded sounds whenever an internal shake sensor is activated.
This project is built around the RadioShack 9V Recording Module. It is a basic sound recorder with 20 seconds of memory. It has one button for the record function and one button to start and stop the playback function. For this project, we are making two modifications to the module. We are adding a wire shake sensor to activate the play function in place of the button. Additionally, we are adding a capacitor to temporarily disable the stop function so that the playback isn't interrupted.
Step 3: Make the wire shake sensor
Start by wrapping the positive lead of the capacitor around the positive terminal of the battery. Be careful not to make contact with the metal casing of the battery. This can create unwanted shorts. Then bend the negative lead of the capacitor into a "J" shape. This will form half of the shake sensor. To form the other half of the shake sensor, remove the any insulation from the ends of a piece of magnet wire and insert it into the negative terminal of the battery. Then attach the battery connector. This will hold the wires in place. Bend the magnet wire into a hook shape and position it as close as possible to the negative lead of the capacitor without making contact. When shaken, these two wires will make contact and activate the play function.