Using capacitor to gracefully shutdown PC

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We all know pulling the plug on a running PC is bad, bc the operating system could be in a critical process and interrupting it would corrupt the system.

But using a capacitor that holds electric charge couldnt we give the PC a couple of „grace seconds“ where the pc finishes its job and then starts the shutdown process?

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9 Answers

Anonymous 0 Comments

You end up needing a really big capacitor

There are already what I’d consider big capacitors in the power supply but they can only give you a fraction of a second to make it through a very brief power disruption

If you want to cover a system that’s running at a mere 35 watts for 5 seconds then you need a capacitor that holds 175 joules. At 500V that would be a 1700 uF capacitor. They make them but they’re about 2 inches in diameter and 4 inches long

If you’re really prone to abrupt power outages then get a UPS, that’s what their meant for and the lead acid battery in there will give significantly longer run time

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