[u407]’s 3D printed Signspinner was created as a clean/dirty indicator for a dishwasher, and at its heart is a mechanism that works a lot like that of a retractable ballpoint pen. Every click of the ...

[u407]’s 3D printed Signspinner was created as a clean/dirty indicator for a dishwasher, and at its heart is a mechanism that works a lot like that of a retractable ballpoint pen. Every click of the ...

One of the greatest things ever invented to annoy teachers and help you day-dream at work is undoubtedly the clicky pen. Of course a ‘clicky pen’ is actually called a ‘retractable pen’, and they have ...