23 Mar
2006
23 Mar
'06
4:05 p.m.
And as primary cells--mercury cells have a remarkably
stable voltage output
over their life.
[Looks sadly at all the classic cameras around here that are more
difficult to use now that ther mercury cells for the exposure meters are
unavailabe. Yes I do know of the work-arrounds...]
IIRC the Weston standard cell is a mercury/cadmium couple.... Although to
be fair a good bandgap voltage reference is accurate enough for anything
I am likely to need, and a lot less hassle.
-tony