I'm a physicist who became a programmer, then an entrepreneur, then a manufacturer, and eventually a mechanic.

I've started companies. I've built products. I've written software. I've worked in factories. I've built experimental equipment. I've fixed motors.

I've also had businesses that didn't work.

That turns out to be useful.

Because there aren't many people who understand a business problem, write the software, wire the electronics, build the machine, and then stand on the factory floor when it doesn't work.

That's what I'm interested in now.