About Engineer-A-Car

Engineer-A-Car is my engineering notebook on integrating modern electronics and software into classic vehicles — written as the work actually happens.

I'm Halldór Stefánsson. I trained first as a mechanic, then studied mechatronics engineering, and now work as a software engineer. I'm drawn to how mechanical, electronic, and software systems fit together.

The centre of it is a long-term project: modernising a 1972 MGB GT. Not a full restomod, and not a museum piece. The aim is to design electrical, electronic, and software systems that are reversible, well-considered, and honest about what they are — systems that coexist with the original engineering rather than replace it.

Around that, I write about embedded systems, communication protocols, and the architecture decisions that come up when you're trying to make something that actually works and that someone else could understand and service years from now.

I write about trade-offs, incomplete ideas, open questions, and mistakes — not just finished solutions. If you're coming from the car side and want to understand how modern electronics fit in, or from the electronics side and want to see how these systems apply to a real vehicle, there's probably something here for you.

— Halldór

Reach me on LinkedIn or at halldor@engineeracar.com.