Re: Sewing pedal = Variac??

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "Antonio Carlos M. de Queiroz by way of Terry Fritz <twftesla-at-qwest-dot-net>" <acmq-at-compuland-dot-com.br>

Tesla list wrote:
> 
> Original poster: "Erik Byng by way of Terry Fritz <twftesla-at-qwest-dot-net>"
<e_byng-at-hotmail-dot-com>

> Those little black pedals on the power cord of a sewing machine controlls
> the speed, yes?
> 
> So whats in them, a small variac??
> To small for TC duty??

As Terry already wrote, these things are usually just variable
resistors.
I once repaired one (a quite old one). It was just a stack of carbon
plates pressed by a spring connected to the pedal. Interesting.

Antonio Carlos M. de Queiroz