Feature: The control panel of the spot welding machine is a controller independently developed for DIY or simple resistance welding applications. It utilizes silicon-controlled phase shifting triggering to adjust time and current for effective welding. Color: Red Material: Plastic Main features of this controller: 1. Utilizes STM8 industrial microcontroller as the control center. 2. Strong and weak electrical circuits are isolated via optocoupler for safe operation. 3. Power and foot switch lines use screw-free fast connection terminals for improved convenience and reliability. 4. Time and current input controlled by high-precision single potentiometer to ensure reliable and convenient adjustment. 5. Built-in power supply with power, status, foot switch, and trigger indicator lights for clear visibility of working status. 6. Reliable zero-crossing detection circuit design ensures accurate phase shift control. Digital control interface displays current time and current settings. Time input range: 150 cycles (1 cycle = 20ms). Current input range: 3099%. Model: 100A Package Contents: 1 x Spot Welding Machine Controller Board Note: The package includes only the items listed above. Other products are not included. Lighting and display differences may cause slight variations between the color of the item in the image and the actual product. Measurement error allowance: +/- 13 cm.