The TAB Book of Arduino Projects: 36 Things to Make with Shields and Proto Shields

CHAPTER 28

Singing Plant

This project is closely related to the theramin project of Chapter 11, but I decided that it belonged here in the novelty section of the book. Instead of using a range finder to alter the pitch of a musical sine wave, this project uses a technique called capacitative sensing to control the pitch (Figure 28-1).

FIGURE 28-1 A musical plant.

The Arduino is attached to one leaf of a plant using a crocodile clip, and the plant (and things close to the plant) alter the pitch of the note played through the audio output socket ...