More power (literally) for the HP-41, follow-up.

[Diego Diaz]

Hi all,

Thanks for your kind words John.

A couple of the Beta prototypes already built, and time to check functionality and parameters consistency.

Some preliminary specs after these first tests.

Quiescent current drain:
Nominal, battery @3.7v : 440uA
Maximum, battery @4.2v : 470uA
"BAT" ON, battery @3.3v : 330uA

100% charge time from "BAT" ON: 4h 45min (approx)*
80% charge time from "BAT" ON: 3h (approx)*
* May depend on the type of charger used; I'll leave this for the Beta testers.

Nominal output voltage 6.3v +/- 0.1v

Max. output current 1Amp. fuse protected.

Since I don't have a card reader with me I'll also leave the CR operation test for the Beta's ;-)
Total number of card passes before "BAT" and the like may be of interest.

Also the Wand is a somewhat "power hungry" peripheral which figures could be of interest for some users.

Questions and suggestions are welcome as usual.

Best wishes.

Diego.