Re: DIY 5X9v bat phantom supply

[Mike Feldman <>]

Allen Cobb wrote:

> For current measurement, I still rely on my trusty old Fluke,
...
> You could also read current through a small resistor, ...

When I mentioned battery testers I meant something that puts
a load on the battery as opposed to just checking open-circuit
voltage with a high-impedence DMM.  For example, my little
cheap Radio Shack tester (22-093) puts 80 ohms across a 9v
batts, and 3.6 ohms across single cell batts.  An alkaline
batt that's weak will show a high reading that will slowly
drop into that load.

-- Mike


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