Any non-price determinant will have an effect on demand.

I really don't know how computer engineers could increase the interest in pc's, but it's not a price determinant and it increases demand.
I'm not really sure what the effect on supply is. I think it should increase, but see if economyst answers this to be sure.

You are correct that any non-price determinant can have an effect on demand for a product. In the case of computer engineers increasing interest in PCs, this can be considered as a non-price determinant that can increase demand for PCs. Computer engineers can play a role in creating new and innovative features, improving performance and functionality, and developing software applications that can enhance the user experience and utility of PCs.

To increase interest in PCs, computer engineers can focus on various aspects such as:

1. Hardware advancements: Computer engineers can work on designing faster processors, more efficient cooling systems, improved graphics cards, and other hardware components that can enhance the performance and capabilities of PCs.

2. Software development: Engineers can develop operating systems, applications, and software tools that cater to specific user needs and offer a seamless and user-friendly experience. This can include advancements in gaming, multimedia software, productivity tools, and more.

3. User experience and interfaces: Computer engineers can work on designing intuitive user interfaces that make PCs more accessible and easy to use, enhancing the overall user experience.

4. Connectivity and networking: Engineers can develop technologies that improve connectivity, such as faster Wi-Fi, Bluetooth advancements, and integration with other smart devices, making PCs more versatile and capable of integrating into smart homes and work environments.

By focusing on these aspects, computer engineers can help generate interest in PCs and increase demand for these devices.

As for the effect on supply, it is logical to assume that an increase in demand would likely lead to an increase in supply. However, to be certain about how supply would be affected, it is best to consult with an economist or an expert in the field.