Re: Batteries for voltage reference

On Sun, 21 Oct 2007 20:16:14 -0500,
hal-usenet@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx (Hal Murray) wrote:

I remember tales from many many years ago about using fresh batteries
as a simple, cheap, and readily available voltage reference.

Has anybody tested that recently?

Assume I'm using standard AA alkaline batteries. How much do they
vary over temperature, age, and from brand to brand? How much
do they vary over manufacturing time within the same brand?

That might be a fun science project.

Are there other inexpensive references that are easily available?

LED


Regards,

Boris Mohar

Got Knock? - see:
Viatrack Printed Circuit Designs (among other things) http://www.viatrack.ca

void _-void-_ in the obvious place


.

Relevant Pages

  • Re: Batteries for voltage reference
    ... as a simple, cheap, and readily available voltage reference. ... Assume I'm using standard AA alkaline batteries. ... vary over temperature, age, and from brand to brand? ... The biggest problem with standard cells for lab use is their horrible temperature coefficient. ...
    (sci.electronics.design)
  • Re: Batteries for voltage reference
    ... Assume I'm using standard AA alkaline batteries. ... vary over temperature, age, and from brand to brand? ... Search for voltage reference on Digikey or Mouser or other. ...
    (sci.electronics.design)
  • Re: Weston Cells
    ... to get a replacement cell. ... If I wanted a chemical primary voltage standard I suppose I'd start ... If *I* were wanting a voltage reference on the cheap I think I'd use ... design your own if you go with one that requires a power source: ...
    (sci.electronics.design)
  • Re: Weston Cells
    ... Jim Thompson wrote: ... Did you know that NIST and CERN now use Zener circuits (as a secondary standard calibrated to a Josephson junction) because the latter is more stable than a Weston cell? ... If *I* were wanting a voltage reference on the cheap I think I'd use ...
    (sci.electronics.design)
  • Re: Batteries for voltage reference
    ... as a simple, cheap, and readily available voltage reference. ... vary over temperature, age, and from brand to brand? ... do they vary over manufacturing time within the same brand? ... Back in the dark ages when they sold VTVM kits, ...
    (sci.electronics.design)