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+--- Thread: [HP 48gII (2007 model), HP 39gII] Power via USB? (/thread-6698.html)
[HP 48gII (2007 model), HP 39gII] Power via USB? - matthiaspaul - 08-17-2016 05:18 PM
Hi,
the HP 39gs, 40gs, 50g and Prime can be powered via USB. Does this also apply to the 48gII (2007 model with 4 batteries, not the older model with 3 batteries) and the 39gII (using a completely different CPU)? I couldn't find any information regarding this anywhere. Does someone know for sure or has one of these two calculators to test?
Thanks and greetings,
Matthias
RE: [HP 48gII (2007 model), HP 39gII] Power via USB? - Guenter Schink - 08-17-2016 08:43 PM
(08-17-2016 05:18 PM)matthiaspaul Wrote: Hi,
the HP 39gs, 40gs, 50g and Prime can be powered via USB. Does this also apply to the 48gII (2007 model with 4 batteries, not the older model with 3 batteries) and the 39gII (using a completely different CPU)? I couldn't find any information regarding this anywhere. Does someone know for sure or has one of these two calculators to test?
Thanks and greetings,
Matthias
I just hooked an HP39gII to USB-power, removed the batteries and the calculator still works.
Günter
RE: [HP 48gII (2007 model), HP 39gII] Power via USB? - rprosperi - 08-17-2016 10:55 PM
(08-17-2016 08:43 PM)Guenter Schink Wrote: I just hooked an HP39gII to USB-power, removed the batteries and the calculator still works.
Günter
I just did nearly the same (I removed 2 of the 4 batteries) with an HP-48GII (late, 4-AAA version) and it also still works. Not a surprise, since it's basically 49G+ h/w with a smaller LCD. Not sure about the earlier, 3-AAA 48GII as I believe it uses a different, non-compatible serial/USB cable, which is not handy.
RE: [HP 48gII (2007 model), HP 39gII] Power via USB? - matthiaspaul - 08-17-2016 11:19 PM
Thank you, Günter and Bob!
(08-17-2016 10:55 PM)rprosperi Wrote:Well, I would assume the earlier model variant of the 48gII doesn't support this.(08-17-2016 08:43 PM)Guenter Schink Wrote: I just hooked an HP39gII to USB-power, removed the batteries and the calculator still works.I just did nearly the same (I removed 2 of the 4 batteries) with an HP-48GII (late, 4-AAA version) and it also still works. Not a surprise, since it's basically 49G+ h/w with a smaller LCD. Not sure about the earlier, 3-AAA 48GII as I believe it uses a different, non-compatible serial/USB cable, which is not handy.
Günter
As far as I understood, this was a new feature with the 50g and that the earlier 49g+ didn't support it, or does it? (Or have there been several versions of the 49g+ as well?)
This would result in the following rules of thumb:
- All models introduced in 2006 or later support it, all earlier models don't.
- All models with 4x AAA batteries (regardless if used in serial or parallel configuration) support it, all models with 3x AAA (or other types of batteries) don't.
Greetings,
Matthias
RE: [HP 48gII (2007 model), HP 39gII] Power via USB? - Joe Horn - 08-18-2016 02:56 AM
(08-17-2016 11:19 PM)matthiaspaul Wrote: As far as I understood, this [power via USB] was a new feature with the 50g and that the earlier 49g+ didn't support it, or does it?
That's correct, the 49g+ has 3 AAA cells and cannot be powered via USB.
RE: [HP 48gII (2007 model), HP 39gII] Power via USB? - rprosperi - 08-18-2016 03:35 AM
(08-18-2016 02:56 AM)Joe Horn Wrote: That's correct, the 49g+ has 3 AAA cells and cannot be powered via USB.
Yikes, my bad. I recalled the 48gII (2nd Ed.) was released with the 49g+, but (quick peek at all these machines) clearly the 48gII (1st Ed.) was released with the 49g+ (both use 3 x AAA, the "other" serial cable and no unit-to-unit cable port) while the 50g and 48gII 2nd Ed. both use the same h/w and features.
Given this, it seems the 2nd Ed. machine should have been called the HP-48.5g. Maybe the 48gII+? Oh never mind..... all 217 owners probably no longer care.
But it still has probably the best keyboard/label color scheme of any of these machines.