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PWM Synthesised Bass Sinewave

A simple sinewave, synthesised on the Arduino by using the PWM (pulse-width modulation) facility. Same Y scale as the photo of the filtered PWM signal, but a much slower timebase. Fuzziness of the signal is due to residual, un-filtered-out, PWM signal at 31.25kHz.

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Uploaded on September 6, 2009
Taken on September 6, 2009