Please visit my blog to complete build istructions: detailed instructions
- Arduino Nano or similar (I used a AZDelivery Nano based on ATmega328P Micro Controller)
- LM35 (temperature sensor)
- IRF540N (Mosfet NPN)
- 1K Ohm resistor
- An heat cable (33Ω/meter)
- a 20V power supply (for the heat cable)
- a 5V power supply (for arduino)
I made some tests with the Serial Plotter from Arduino IDE.
Here setting 24°C as target temperature:
Here setting 30°C as target temperature:
In the last one, after some minutes, I switched off the heating source's power supply (at the end you can see the curve goes down).
See the LICENSE file for license rights and limitations (GNU LGPLv3).