Spot Welder Control Board | Adjustable Time & Current Display
Spot Welder Control Board | Adjustable Time & Current Display
Spot Welder Control Board with Digital Display – Precision DIY Battery Welding
Take full command of your spot welding setup with this professional-grade Spot Welder Control Board. 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.
Key Features
- STM8 Industrial Microcontroller: High-performance control center ensures stable, precise operation. Optocoupler isolation separates high-voltage and low-voltage circuits for safe, reliable performance.
- Adjustable Time & Current: 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.
- Zero-Crossing Detection: Reliable zero-crossing detection circuit ensures accurate SCR phase transfer, reducing weld inconsistency and extending component life.
- Compatible with 40A & 100A SCR Thyristors: Works with standard ordinary thyristors for flexible power configurations.
- Digital Display Panel: Clearly shows current time and current settings at a glance — no guesswork, just precision.
- Quick-Connect Terminals: Power line and foot switch line use bolt-style quick connection terminals for fast, secure hookup.
- High-Precision Potentiometer Input: On-board power supply, state, pin, and trigger indicators provide full visibility of operating status.
- CE Certified: Meets CE safety and electromagnetic compliance standards.
Specifications
| Material | PCB |
| Color | Red |
| Current Options | 40A / 100A (optional) |
| Thyristor Type | Ordinary thyristor (40A or 100A) |
| Transformer Input | Common 1 AC 9V transformer |
| Welding Pin | 3 × 100 welding pin, aluminum oxide copper |
| Foot Switch | EKW-5A-B aluminum foot switch |
| Connector | DKJ10-25 European-type quick connector cable |
| Rocker Switch | Red rocker switch fused with power socket |
| Control Panel Size | 8 × 6 cm / 3.15 × 2.36 in |
| Display Screen Size | 4 × 3.5 cm / 1.57 × 1.38 in |
| Certification | CE |
| Country of Origin | Made in Mainland China |
What's in the Box
- 1 × Motherboard
- 1 × Display Board
- 1 × Cable
Important Notes
Due 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.
For general electrical and tool safety best practices, refer to guidance from the U.S. Occupational Safety and Health Administration (OSHA) – Electrical Safety.
Frequently Asked Questions
Q: What microcontroller does this spot welder control board use?
A: This control board is built around an STM8 industrial-grade microcontroller, which provides stable and precise control over welding time and current. It uses optocoupler isolation to safely separate strong and weak current circuits.
Q: What are the adjustable time and current ranges on this spot welder board?
A: The input time is adjustable from 1 to 50 cycle units (where 1 cycle equals 20 ms), and the current is adjustable from 30% to 99%, giving you fine-grained control over your weld energy for various battery and metalwork applications.
Q: Is this spot welder control board compatible with both 40A and 100A thyristors?
A: Yes! The board supports both 40A and 100A ordinary thyristors, making it versatile for different transformer setups and power requirements in DIY battery pack building and spot welding projects.
Q: What transformer is required for this spot welder control board?
A: This board is designed to work with a standard common AC 9V transformer (single-phase). It is not included in the package — ensure you have a compatible transformer before setting up your spot welding station.