>What *is* the proper diode? It would seem that a 1.35V Zener would be the
>Right Thing, but they don't make those that I've found...
My company makes bandgap circuits that act as a zener at around 1.25V
and they draw something like 0.8uA for the LT1389, and I think we have
another one that draws even lower 0.3uA of current, but I haven't
figured out how to use them for this application. A schottky diode that
drops 0.15-0.2V in series with the battery would cause 0 extra current
drain, and since most metering circuits are fairly constant current,
can be calibrated with a little series R. A 1n5819, for instance, drops
0.15V at 1mA. Anyone know what the current drain is with the camera
meter switched on?
Wayne
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