Multi function Spot Welder Control Board: Provides adjustable single and double welding settings, welding count, and synchronous triggering with power off saving. The 41A thyristor version can control a transformer below 1000W, enabling reliable performance for compact welding tasks. AC transformer requirements: Must be powered by an AC transformer in the 12V17V range. DC power supplies are not supported. Enhanced design and easy installation: Supports double sided welding with an optimized component layout, making installation easier inside the machine housing and reducing assembly effort. Foot pedal anti shaking function: The foot pedal anti shaking feature ensures that each press completes a welding cycle, helping prevent miswelding caused by poor switch contacts or other factors. Practical use scenarios: Battery tab welding and small metal tab connections in DIY electronics or battery packs, where controlled, repeatable weld cycles are important. or assembly of small metal enclosures and chassis components, benefiting from adjustable settings and reliable triggering. Prototyping or hobbyist projects that require consistent weld performance, timercontrolled welding counts, and poweroff saving to protect components.