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Hi,
I have a small variac that was used as the speed control for an old floor-standing humidifier.
It has only 2 leads and a limited range (120Vac in/≈80-120v out).
Does anyone know how this works?
Is it a bucking auto-transformer?
Please help.
Thanks!I didn’t find the right solution from the Internet.
References: https://forum.allaboutcircuits.com/threads/slide-variac-transformer.142998/
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