I was washing my hands and looking at my face in the mirror. My scraggly beard needs a trim. While I know it needs a trim, I don’t want to over trim it. Unfortunately, it really needs a trim because of all the split end because I never do trim it. Possible solution.
Small rotary trimming head with a variable height trimmer. As the trimmer moves, it pulls the hair, via a vacuum pump, as far as possible. Then, using an light sensor, it determines the length of the hair, moves the sensor in and trims.
No, that won’t work. Every pass, it would get progressively shorter. Again, this is way too much shaving discipline for me.
I could map my face, so that a series of movements trimmed the whole thing? Maybe one of the head rests like at the optometrist?
I should think this one through.