First: Induction Cooktop Power Board (Part Number: 9798665-D) This board is exclusively used in home appliances, specifically smart induction hobs from brands like Whirlpool, Ariston, and Indesit. Its primary uses and functions include: Power Conversion and Filtering: Converts household AC power to DC and high frequencies to operate the magnetic induction system. Powering Induction Coils: Operates the magnetic heating coils via power transistors and heat sinks to generate heat directly within cookware with high efficiency. Home Control and Protection: Manages on/off circuits through relays and protects the cooktop from overload or overheating using filter capacitors and integrated electronic circuits. Second: Kemppi Industrial Welding Machine Main PCBA (Part Number: SP800648) This board is exclusively used in the heavy industrial equipment sector, specifically for the maintenance and operation of professional welding machines from the Finnish brand Kemppi, model (Kemppi Master S 400 CEL). Its uses include: Industrial Welding Arc Control: Precisely manages and stabilizes welding current and voltage for various welding applications (such as CEL cellulosic electrode welding used in pipelines and structural steel). High Power Processing: Regulates the input and output power of heavy-duty welding machines to ensure stable and consistent performance even under the most demanding working conditions in factories and construction workshops. Electronic Machine Protection: Monitors temperatures, regulates system response, and protects the internal components of the welding machine from damage caused by current fluctuations or high pressure.