PTC constant temperature heating table

! ! ! ! ! This project involves household 220V high voltage electricity and high temperature. Please pay attention to the safety of electricity. I am not responsible for any safety issues caused by this project! ! ! ! !

! ! ! ! ! This project involves household 220V high voltage electricity and high temperature. Please pay attention to the safety of electricity. I am not responsible for any safety issues caused by this project! ! ! ! !

! ! ! ! ! This project involves household 220V high voltage electricity and high temperature. Please pay attention to the safety of electricity. I am not responsible for any safety issues caused by this project! ! ! ! !

The main control chip uses STC8H1K28, which is compatible with LQFP32 packaging and QFN32 packaging. LQFP32 packaging is recommended for better soldering.

The temperature sensor uses PT1000 (Taobao search platinum resistor)

The power supply is this kind of three-pin plug, which is the same as my soldering station. I don't know what it's called.

The temperature display is still very accurate, and the constant temperature is also good, stable within ±3°C. Temperature curve (↓). (It took me three days to adjust the PID