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Data over Pulse Width Modulation?

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Steve has investigated the possibility of “data” being transmitted along on a pulse width modulation (PWM) signal wire when fault conditions occur:

"A recent inquiry via Facebook introduced the notion of “data” being transmitted along on a pulse width modulation (PWM) signal wire when fault conditions occur.
As we know, PWM is used to control a variety of actuators across numerous control systems.

Below, we take a look at the PWM signal responsible for controlling the speed of a BMW F31 cooling fan."

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