Last updated on December 26, 2017, 8:22 by Sebastian Mihai
In this video, I've connected the output of an astable 555 timer to an inductor, to shape its output into an almost pure sine wave. The inductor generates a surrounding electromagnetic field, inducing current into a second coil, which I'm holding closely.
The induced alternating current can be used to drive a small speaker wirelessly, and with no additional power supply.
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