40A Spot Welding Control Board DIY Control Board Digital Display Single Chip Microcomputer for Adjusting Time and Current

Features:
Adopt STM8 industrial control center microcontroller.
The strong and weak current is insulated through the optocoupler to ensure safe operation.
A reliable zero crossing detection circuit is designed to ensure the phase shifting accuracy of thyristor.
The power line and foot switch line adopt bolt type quick connection terminals, which is more convenient and reliable.
Vehicle power supply, status, pin, trigger indicator light, the working status of which are clearly visible.
Compatible with optional 40A/100A thyristor.
The digital control interface can display the current time and current setting.
High precision simple potentiometer is used for input time and current to ensure reliable and convenient input.
Input time 1-50, cycle unit (one cycle is 20 ms), current input (30-99%).