organic flexible solar cell phone charger may need upscaling IMO. as the design is brilliant
but the solar surface area looks too small . for fast emergency phone re-chargeing. if the multiple phones need charging in an emergency.
if say flexible solar is designed to be the size of a folded umbrella when closed, & when it is open, the flexible solar size of a hammock with end bar & tie strings. one end around a tree other on the ground.
HP 48G destructive calculator teardown is not necessarily the end of it
try some modding /repackaging of the calculator pcb and adding custom-made button switches in a new enclosure.
have you seen modding video game console enclosures. new box cutters
Dave have you considered a robot knife arm to help with
opening your mail. Mailbag is a repetitive process, so put some of your engineering skills to work.
add same automation to your job.
you never know, the airport security industry, may just pay for a working robot prototype.
all suggestions, tongue in cheek !Good show Dave