RBM wrote:
You got it, the higher you set it, the longer period of cycle time it keeps
the circuit closed



"Davej" wrote in message
...

I was just thinking about electric ranges and wondering how the
controls for the heating elements actually work. Does anyone know?
They can't be variable resistors because they would dissipate too much
power. They obviously aren't variable autotransformers. They can't be
triac-dimmers because they pre-date that technology. So what are they?
Some sort of duty-cycling switch? Thanks.




What's the typical on-off cycling rate at say 1/2 power.

Jeff (Who is too lazy to stick a clamp on ammeter on an element lead.)

--
Jeffry Wisnia
(W1BSV + Brass Rat '57 EE)
The speed of light is 1.8*10^12 furlongs per fortnight.