{"product_id":"spot-welder-control-board-adjustable-time-current-digital-display","title":"Spot Welder Control Board | Adjustable Time \u0026 Current Display","description":"\n\u003ch2\u003eSpot Welder Control Board with Digital Display – Precision DIY Battery Welding\u003c\/h2\u003e\n\u003cp\u003eTake full command of your spot welding setup with this professional-grade \u003cstrong\u003eSpot Welder Control Board\u003c\/strong\u003e. Featuring an STM8 industrial microcontroller, adjustable time and current settings, and a clear digital display, this board is the perfect upgrade for DIY battery pack builders, electronics hobbyists, and workshop professionals who demand accuracy and reliability.\u003c\/p\u003e\n\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSTM8 Industrial Microcontroller:\u003c\/strong\u003e High-performance control center ensures stable, precise operation. Optocoupler isolation separates high-voltage and low-voltage circuits for safe, reliable performance.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAdjustable Time \u0026amp; Current:\u003c\/strong\u003e Input time range of 1–50 cycle units (1 cycle = 20 ms); current adjustable from 30–99% — dial in the exact weld energy your project demands.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eZero-Crossing Detection:\u003c\/strong\u003e Reliable zero-crossing detection circuit ensures accurate SCR phase transfer, reducing weld inconsistency and extending component life.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCompatible with 40A \u0026amp; 100A SCR Thyristors:\u003c\/strong\u003e Works with standard ordinary thyristors for flexible power configurations.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDigital Display Panel:\u003c\/strong\u003e Clearly shows current time and current settings at a glance — no guesswork, just precision.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eQuick-Connect Terminals:\u003c\/strong\u003e Power line and foot switch line use bolt-style quick connection terminals for fast, secure hookup.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHigh-Precision Potentiometer Input:\u003c\/strong\u003e On-board power supply, state, pin, and trigger indicators provide full visibility of operating status.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCE Certified:\u003c\/strong\u003e Meets CE safety and electromagnetic compliance standards.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMaterial\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003ePCB\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eColor\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eRed\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCurrent Options\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e40A \/ 100A (optional)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eThyristor Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eOrdinary thyristor (40A or 100A)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eTransformer Input\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eCommon 1 AC 9V transformer\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eWelding Pin\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e3 × 100 welding pin, aluminum oxide copper\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eFoot Switch\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eEKW-5A-B aluminum foot switch\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eConnector\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eDKJ10-25 European-type quick connector cable\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eRocker Switch\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eRed rocker switch fused with power socket\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eControl Panel Size\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e8 × 6 cm \/ 3.15 × 2.36 in\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDisplay Screen Size\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e4 × 3.5 cm \/ 1.57 × 1.38 in\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCertification\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eCE\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCountry of Origin\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eMade in Mainland China\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eWhat's in the Box\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e1 × Motherboard\u003c\/li\u003e\n  \u003cli\u003e1 × Display Board\u003c\/li\u003e\n  \u003cli\u003e1 × Cable\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eImportant Notes\u003c\/h3\u003e\n\u003cp\u003eDue to differences in monitor settings and lighting conditions, the actual product color may vary slightly from images shown. Please allow a 1–2 cm deviation due to manual measurement.\u003c\/p\u003e\n\n\u003cp\u003eFor general electrical and tool safety best practices, refer to guidance from the \u003ca href=\"https:\/\/www.osha.gov\/electrical\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eU.S. Occupational Safety and Health Administration (OSHA) – Electrical Safety\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003ch4\u003eQ: What microcontroller does this spot welder control board use?\u003c\/h4\u003e\n\u003cp\u003eA: This control board is built around an \u003cstrong\u003eSTM8 industrial-grade microcontroller\u003c\/strong\u003e, which provides stable and precise control over welding time and current. It uses optocoupler isolation to safely separate strong and weak current circuits.\u003c\/p\u003e\n\n\u003ch4\u003eQ: What are the adjustable time and current ranges on this spot welder board?\u003c\/h4\u003e\n\u003cp\u003eA: The input time is adjustable from \u003cstrong\u003e1 to 50 cycle units\u003c\/strong\u003e (where 1 cycle equals 20 ms), and the current is adjustable from \u003cstrong\u003e30% to 99%\u003c\/strong\u003e, giving you fine-grained control over your weld energy for various battery and metalwork applications.\u003c\/p\u003e\n\n\u003ch4\u003eQ: Is this spot welder control board compatible with both 40A and 100A thyristors?\u003c\/h4\u003e\n\u003cp\u003eA: Yes! The board supports both \u003cstrong\u003e40A and 100A ordinary thyristors\u003c\/strong\u003e, making it versatile for different transformer setups and power requirements in DIY battery pack building and spot welding projects.\u003c\/p\u003e\n\n\u003ch4\u003eQ: What transformer is required for this spot welder control board?\u003c\/h4\u003e\n\u003cp\u003eA: This board is designed to work with a standard \u003cstrong\u003ecommon AC 9V transformer\u003c\/strong\u003e (single-phase). It is not included in the package — ensure you have a compatible transformer before setting up your spot welding station.\u003c\/p\u003e\n\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"What microcontroller does this spot welder control board use?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"This control board is built around an STM8 industrial-grade microcontroller, which provides stable and precise control over welding time and current. 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