Ok so I have a joke project that requires the following
1: plays a wave file (loop)
2. Activated upon a pressure switch
3. must be cheap to produce in mass (2 -5 bucks max)
I'm thinking of 1 dollar mp3 players that come from china but how to activate it to play just one loop.
Mostly I think there is not a lot of mechanics here. A watch battery, switch, pic (holds wave file to play) and a small speaker.