Hello!
I would like to make control circuit for heater. Heater function is to protect device from too low temperature(<0 C). My idea is to make it without temperature sensor and it sense temperature only from the heater resistance changes. The heater works with AC about 70-100V. Is it posible if resistance changes for 10 celsius amplitude only for about 10 ohms? Some variants I find in internet but in these circuit are used temperature sensors:
http://sicimatic.blogspot.com/2013/10/electronic-smart-heater-controller.html
http://www.final-yearproject.com/2009/02/hvac-thermostat.html#.UxeoEvl_u3S
What did you can suggest?
Thank you!
I would like to make control circuit for heater. Heater function is to protect device from too low temperature(<0 C). My idea is to make it without temperature sensor and it sense temperature only from the heater resistance changes. The heater works with AC about 70-100V. Is it posible if resistance changes for 10 celsius amplitude only for about 10 ohms? Some variants I find in internet but in these circuit are used temperature sensors:
http://sicimatic.blogspot.com/2013/10/electronic-smart-heater-controller.html
http://www.final-yearproject.com/2009/02/hvac-thermostat.html#.UxeoEvl_u3S
What did you can suggest?
Thank you!