On 02/06/2016 05:05 PM, Lyndon Nerenberg wrote:
Voltage? Recharging circuits? Current sinking capacity. It's not always a 1:1 mapping.
You're talking about RTC and perhaps a bit of static RAM maintenance. If this RTC unit is like most of the same era, the operating voltage range is quite wide (probably about 2-7V) and sub-1ma current draw. Chargers for this type of application are usually very low current, so "cooking' some AA cells is a very remote prospect. This is hardly a power-hungry project.
If you're not interested in a "authentic" look, a plain old lithium primary coin cell or two, with a blocking diode in this circuit should work for years.
--Chuck
