HP-25C Eumulator

[Chris Chung]

(12-21-2014 11:11 PM)Massimo Gnerucci Wrote:  

(12-21-2014 10:03 PM)Steve Simpkin Wrote:  From a previous post by Chris in this thread:
"Actually the initial plan was to try create flashy badges (yet functional) for conferences, notice pcb w/ the slot for badge holders"

He had a picture showing a neck strap on one as well.

That's the hole on the bottom.

It's more cosmetic than anything. I was testing my PCB suppliers capability by introducing square holes, turns and bends here and there and that notch is good place to cut out as there are no components nor traces going through. It is a "thumb rest" for me. You won't be resting your thumb there though as the tiny unit requires you to use both hands to key. I can only operate it like a small bar phone and do thumb typing.