Post by mountaingoat on Oct 26, 2015 5:47:36 GMT -5
The big tube is 0.84 inches in diameter - 21 mm and the regular marker is 0.72 - 18 mm. Even the big one seems to fit nicely in the hand.
Because the big tube does not get narrower towards the tip, the circuit can be pushed pretty far up so a button could definitely fit at the end.
The tip was just a tiny bit too small for the transistor I used, so I had to drill it out to have the transistor fit through the hole. I would have had to do the same with the "standard" marker as well.
One word of caution is that the king size sharpie is (not surprisingly) a permanent marker so one must be more careful placing the innards after disassembly to not leave marks on tables etc. :-)