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Comment on Microwave Oven Failure: Spontaneously turned on by its LED display (2024)

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This control board uses the same microcontroller GPIO pin to both drive segment A of the LED display and sense the door switch.

Is it necessary to be so skimpy with a safety feature?

Later sections of the article detail how there are multiple different safety features integrated to guard against various different failures triggering the magnetron with the door open.

The post explains how the microcontroller sensing the door switch is not a safety feature.

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