this post was submitted on 08 Jun 2025
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I looked into this recently - microwave ovens emit an electromagnetic frequency due to the power coursing through them that's very useful for tracking time, so that is why they usually have clocks. The problem is, the frequency is dependent on the power it receives, and mains voltage fluctuates. For example, those in a UK household may have heard that mains voltage is 240V. In reality this is 230-250V (reference below). The clock running a slight bit faster indicates a higher trending voltage than the microwave was rated for.
Did GPT write this? Literally no clock keeps time via mains RMS voltage. They use the frequency, if anything, and that is far more stable than the el cheapo RTCs in microwaves etc.
It’s frequency based. Voltage can’t be used to measure time in anyway I can’t think of.