Ask HN: How to get a first customer when you only have hobby-level demos?

I developed over the past couple of months a tool for simulating embedded systems. I'm at a point where I could go to potential customers and demonstrate the product, however I do not have any real-world use cases to show them yet, only hobby-level small projects that I created with the tool. How can I get around this chicken and egg problem of finding a first customer to sell to while not having any industrial use cases?