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When you complete this project, you’ll have what we like to call a Couch Pet-ato. This device is a box rigged with a vibration sensor and recording/ playback setup. You can record your voice, shouting something like, “Get the &!@!#@ off the couch!” or a shrill noise of your choosing. When your pet jumps onto the couch, the vibration sets off the playback.

You can see the finished Couch Pet-ato in Figure 14-1.

So what, exactly, will you be doing in this chapter? The project involves

1. Putting together the electronic circuit

2. Fitting the circuit into a wooden box

3. Attaching switches, a microphone, and a speaker