[chbot] Knob shafts / extensions and insulation

[Helmut Walle]

Double heat shrink the metal shaft? (And use a plastic knob)? Would that 
work for you?

Kind regards,

Helmut.

On 30/08/16 23:28, Volker Kuhlmann wrote:
> I'm planning to put a mains voltage circuit into a suitable box with
> clear lid. One knob will have to come out through the lid. I'd like a
> rotary encoder with push switch - unfortunately, push switch and plastic
> shaft seem to be mutually exclusive. I can't find plastic shaft
> extensions either.
>
> Is it permissable to stick a metal shaft out through the lid, assuming
> the mains voltage side is appropriately insulated and tied down?
>
> Suppose in another project a capacitive power supply is sufficent, and
> Arduino runs on mains potential. Does anyone know a clever trick to
> use a metal shaft encoder here (without surgical replacement and 3D
> printed parts)?
>
> Thanks,
>
> Volker
>