this post was submitted on 18 Oct 2025
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Science Memes

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[โ€“] CountVlad47@feddit.org 23 points 1 month ago (1 children)

Just piggy backing this comment to save people a click. A mercury-arc valve is used to convert alternating current (AC) to direct current (DC). It probably got a WTF for how weird it looks and how it looks like a crystal ball when it's working.

[โ€“] redsand@lemmy.dbzer0.com 7 points 1 month ago

Are you telling me that's a full bridge rectifier made of glass, liquid metal and plasma?๐Ÿง™โ€โ™‚๏ธ