Megaphone with no batteries required

Here is a very original megaphone that doesn't require any batteries. It is built around a shake flashlight that is powered by its own internal electrolytic capacitor that we previously charged from the energy of our muscles - by shaking hands of course.

Inductive circuit inside a flashlight is kept as-is and a simple LM386 audio amplifier was constructed on a proto-board. A speaker is mounted inside a plastic cup (acting as a sound funnel) and glued at the other end of a flashlight.

Now, all you need to do is make sure you don't run out of energy whilst making a very important speech for the masses.

© prizepony

[ Source: prizepony ]

Megafon bez baterija Bookmark and Share Comments (1)

comment [1]

ili drugi naziv za ovo čudo je porno megafon
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