Really interesting!!
I'm looking forward to my heater (I attached the schematic).
The controller I built is simple and cheap. These are the main components:
- A temperature sensor LM35 - 1,30€
- A resistor divider to set a 0.6V reference (60ºC)
- An general purpose op-amp to use as comparator LM358 - 0,50€
- A MOSFET P-CHANNEL to switch the heater on/off depending on the temperature - 1,01€
- 5V Voltage regulator 7805 - 1,7€
I will comment my experience as soon as I get all materials.
Regards,
Jose.
