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February 28 2010

neingeist

Changing the Arduino PWM Frequency « The Smell of Molten Projects in the Morning

The default PWM frequency for PWM 3, 9, 10, & 11, at least for the Diecimila running at 16 MHz, is 488 Hz. That’s OK for dimming LEDs where you’re depending on persistence of vision, but it’s much too low when you must filter it down to DC.