A user is seeking a simple and affordable circuit diagram or PCB design for a DC to AC inverter that converts 12V DC to 220V AC at 50 Hz, specifically for use with a car cigarette lighter. Concerns are raised about the dangers of working with high voltages, emphasizing the need for proper isolation and safety precautions. The discussion highlights the difficulty of sourcing necessary components, such as transformers, which are not readily available to the general public. Some participants suggest exploring specialty shops or cottage industries that cater to similar needs, while others express skepticism about the feasibility and cost-effectiveness of building an inverter compared to purchasing one. Overall, the conversation underscores the importance of safety and the challenges involved in DIY inverter projects.