HP-19C display question
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07-30-2021, 02:12 PM
(This post was last modified: 07-30-2021 02:15 PM by J-F Garnier.)
Post: #1
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HP-19C display question
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 |
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07-30-2021, 05:47 PM
Post: #2
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RE: HP-19C display question
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? --Bob Prosperi |
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07-30-2021, 06:09 PM
(This post was last modified: 07-30-2021 07:03 PM by C.Ret.)
Post: #3
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RE: HP-19C display question
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. |
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07-30-2021, 07:58 PM
Post: #4
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RE: HP-19C display question
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 |
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07-31-2021, 10:21 AM
(This post was last modified: 07-31-2021 10:22 AM by J-F Garnier.)
Post: #5
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RE: HP-19C display question
(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 |
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07-31-2021, 11:34 AM
Post: #6
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RE: HP-19C display question
(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. 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... |
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