As an embedded developer I do this regularly and encourage others to do the same. I bring a binder, each page has a large photo of a project or PCB and lists th

As an embedded developer I do this regularly and encourage others to do the same. I bring a binder, each page has a large photo of a project or PCB and lists the core technologies involved. I also bring a small case with a few previous projects from other jobs, ones that I can legally share outside an NDA, and a power supply. It's been critically handy in some situations when I'm asked if I've worked with a certain technology, chip, protocol, etc. I can either flip to the page with a relevant project and start pointing (which also jogs my memory), or plug in the related device and fire it up. It definitely gets their attention and stands out.