Your cellphone offers huge possibilities with just a paper cone, battery, and a few wires.

Photograph by Daniel Jolliffe


Build your own anonymous megaphone. By Daniel Jolliffe

You, too, can bring anonymous voices into public spaces, stage an anonymous protest, or speak to the masses without revealing your identity. I’ve created a grander version of this anonymous megaphone (see Made on Earth, page 16), but a cellphone, some construction paper, a battery, and a few wires can easily do the trick.

Turning your cellphone into an automatic megaphone is a snap. I’ll show you how to build an unattended megaphone that projects ...

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