This is a controller board for spot welding machines up to 100A. Control core based on an STM8 microcontroller with reliable zero-crossing detection for precise phase shift in 40A-100A thyristors; build your own spot welder!
Features:
Optocoupler isolation for safe operation between power and control circuits
Screwless quick-connect terminals for power and foot pedal cables
Time (1-50 cycles, 20ms per cycle) and current (30-99%) input via precision single-turn potentiometer
Digital display showing set time and current in real time
Integrated LED indicators for power, pedal, and trigger status
Intuitive digital control interface. Robust and reliable industrial design for professional welding applications.
