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Friday, May 21, 2021
TRACKING WITH CLOSEUPS: Waxworks: Thermal Fuse
An unusual component: A wirewound power resistor in a ceramic case that includes a built-in thermal fuse.
— Evil Mad Scientist (@EMSL) May 21, 2021
Outtake from a photo shoot with @TubeTimeUS pic.twitter.com/o4Ly7jIUrc
The way that it works inside is pretty neat too: It's like a pushbutton that is held down by a finger made of wax.
— Evil Mad Scientist (@EMSL) May 21, 2021
When the wax melts, a spring pushes the button open. When the wax cools and solidifies, that *does not* push the button again, and the circuit stays open. /🧵
Posted at May 21, 2021 15:06