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+--- Thread: HP-19C display question (/thread-17297.html)
HP-19C display question - J-F Garnier - 07-30-2021 02:12 PM
The HP-19C has a wider display than the 29C, actually similar to the HP-67.
But is it possible to key in more than 10 digits, as shown on the picture:
I can't do it on my 29C, nor on my 67.
J-F
RE: HP-19C display question - rprosperi - 07-30-2021 05:47 PM
No, not possible, at least not through normal number pad entry; Upon trying that, the display shows "0123456789." and subsequent keys simply blink the display.
Probably a photoshop exercise to break the rules of HP physics...
I suppose there could be some equivalent of synthetic instructions that can generate such a display, but I've never read of such tricks.
Where did the photo come from?
RE: HP-19C display question - C.Ret - 07-30-2021 06:09 PM
On the picture, brightness of the figure is not even. It's look more like the flickering digits that appears rapidly when the calculator is running a program or at computing one function.
Due to the exposition time of the camera, mantissa figure positions as well as exponent figure positions are visible. This make believe a larger integer number can be display or enter than we can possibly type-in. But in reality, figure are display rapidly at any pseudo-random positions due to internal activity.
This alive display with flickering figures is common to numerous other calculators.
RE: HP-19C display question - teenix - 07-30-2021 07:58 PM
A low chance, but it might be possible to have a looped program running where this display is shown most of the time while it is flickering during processing, make a smart phone movie and select the wanted image frame.
Such as...
0
1
2
3
4
5
6
7
8
9
ENTER
LBL 1
Many X<>Y's
...
GTO 1
cheers
Tony
RE: HP-19C display question - J-F Garnier - 07-31-2021 10:21 AM
(07-30-2021 02:12 PM)J-F Garnier Wrote: The HP-19C has a wider display than the 29C, actually similar to the HP-67.
Actually, I was wrong, the 19C display is not the same than the 67.
The 67 has a 15-digit display, able to fully display the sign, the mantissa (10), the dot and the exponent with sign (3) : total=15.
The 19C (that I don't own) seems to have a 13-digit display, using a full digit for the dot, otherwise working like the series 20.
Is that correct? Are they other LED models using the same 13-digit display?
J-F
RE: HP-19C display question - Thomas Okken - 07-31-2021 11:34 AM
(07-31-2021 10:21 AM)J-F Garnier Wrote: The 19C (that I don't own) seems to have a 13-digit display, using a full digit for the dot, otherwise working like the series 20.
Is that correct?
Yes, that is correct.
(07-31-2021 10:21 AM)J-F Garnier Wrote: Are they other LED models using the same 13-digit display?
Only the HP-10, I think...