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new-age batteries as field-expedient voltage references?
ojunk (PaulH96636) wrote in
:
There are no longer any batteries on the market with a
native voltage stable enough to use as a reference.
Yep, istr that there was one type of mercury battery which could
indeed be used as a reference cell, but nowadays
they cannot be made because of disposal problems. Perhaps they could
be made under the stipulation that they be made available only to
technicians or supply houses, so that the general population would not
have ready access, and thereby not contribute much to pollution
(ok, so that's a pipe dream... ;-) ) -ph
What for,when you can use an ordinary alkaline cell or 2 and a bandgap
reference diode or IC,and get better accuracy,and better tempco and
portability?
If you wanted to get elaborate,you could stack several references and have
a range of voltages to choose from.
--
Jim Yanik,NRA member
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