To cut off a forward-conducting unidirectional thyristor, as a forward-conducting thyristor will form a maintaining current within itself, which will maintain its conductivity; only by making this maintaining current 'zero' can we stop its conductivity.
In the circuit for the "electronic candle" we are making:
Point movement switch S1: Used to apply a positive voltage to the G pole; press it once, and the controllable silicon will conduct, and the candle lamp will light up;
Trigger switch S2: Used to short-circuit the A pole and K pole for a moment, at that instant, the current through the thyristor becomes zero (the original current through the thyristor has 'detoured' to the copper sheet), the internal maintaining current is lost, and the thyristor breaks, the candle lamp will also be extinguished.

Company Profile

 AiGou Toy Factory was established in 2007. After ten years of unremitting efforts, our company has gradually matured; Our company is a member of the National Ministry of Education Teaching Equipment Industry Association, a backbone enterprise of Zhejiang Province's teaching equipment, and the company has been awarded the "Heavy Contract and Credit-Keeping" unit for three consecutive years by Yiwu City. In 2014, it was designated by the Zhejiang Provincial Education Bureau as the "Culture and Popularization Experiment Equipment Fixed-point Production Unit".

AiGou Company is a high-tech enterprise that integrates modern scientific research and development, educational equipment, curriculum design, teaching resource integration, and technical services. AiGou, with its high-tech products, is a professional enterprise in the development and production of popular science experiment teaching materials in the country. The products are exported to Europe and the United States.
 After years of accumulation, the company has initially reached a certain scale. In terms of technological innovation, the company has professional design personnel engaged in the development of scientific education products and the upgrade and replacement of existing products. In terms of production, management, and service, the company strictly implements the standards of the ISO9001 international quality assurance system. In marketing, the AiGou products have been entered into many provinces and cities in the country and enjoy a good reputation. For many years, it has provided high-quality, advanced, professional series of modern teaching equipment and professional equipment research and development custom services for the educational community. With excellent, high-quality professional talents and perfect after-sales service, it ensures the excellence of product quality and establishes a good corporate image. The scientific education physical series, chemical series, photovoltaic, wind energy, geography, biology, art and other products of Qiquan have successfully won bids in the education bureau tenders many times.

 AiGou Company continues to adhere to the business philosophy of 'quality first, service to diligence, honesty in conduct', providing excellent equipment and high-quality service for school teaching and research. We are willing to work diligently with new and old friends at home and abroad, work together, and devote our utmost efforts to education, dedicated to the cause of education.

 Love to buy allows every child to keep up with the times!!!