George L.
New Member
I just bought a 1000W Hot Plate for 20 dollars. It is made for cooking food so it has a large coil, which gets VERY hot. I would like to modify this so I could use it for some chemistry projects. The coil gets TOO HOT. If you touch it on the lowest setting you can get burned. I would like to modify it so the heat range is lower and it doesn't get as hot.
I opened it up and found a very simple yet mysterious circuit inside. I can't figure out how it works so therefore I can't modify it yet.
Attached is a schematic of the inside and a pic of a mysterious part that controls the temp of the coil.
Does anyone understand how this works...the regulating device either has 0 resistance or reads as an open circuit???
(The Neon indicator comes on when the coil is "Active")
The regulator device is the biggest mystery...it has two circular contacts that move either closer or further depending on which way you move the dial. They touch throughout 80% of the range of the dial. There are only two contacts on it. What is it???
thanks
George L.
I opened it up and found a very simple yet mysterious circuit inside. I can't figure out how it works so therefore I can't modify it yet.
Attached is a schematic of the inside and a pic of a mysterious part that controls the temp of the coil.
Does anyone understand how this works...the regulating device either has 0 resistance or reads as an open circuit???
(The Neon indicator comes on when the coil is "Active")
The regulator device is the biggest mystery...it has two circular contacts that move either closer or further depending on which way you move the dial. They touch throughout 80% of the range of the dial. There are only two contacts on it. What is it???
thanks
George L.