10 years after I was hired, one of the interviewers still remembered me showing him a small board that I'd designed, even though he was a Windows MFC programmer

10 years after I was hired, one of the interviewers still remembered me showing him a small board that I'd designed, even though he was a Windows MFC programmer and didn't know the first thing about microcontrollers. I've made great hires who had binders just like you described.