“In this Instructable you can learn how to make a hot air gun controller using Arduino and other common components. In this project, PID algorithm is used to calculate the power required and is controlled by a isolated Triac driver.
this project uses a handle compatible with 858D, it has a K-type thermocouple, 700 watt 230 VAC heater and a 24 VDC fan.
This controller is efficient and reliable compared to the commercial one and is easy to build.”