Printing into an HP-82240A/B printer emulator; HowTo?

Discussion around the SwissMicros DM41X calculator
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floppy
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Printing into an HP-82240A/B printer emulator; HowTo?

Post by floppy »

Hello,
so far understood: the DM41X print on paper of HP-82240A/B via the IR.
Is there any possibility to print into any printer-Emulator on a PC?
= connecting an IR-device to a PC (where to find?); then the transfered data (via the IR-device connected via USB to the PC?) would be stored in a readable text form anywhere (in a file or an emulator).
rprosperi
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Re: Printing into an HP-82240A/B printer emulator; HowTo?

Post by rprosperi »

Yes, Meindert Kuipers created a clever modern IR receiver which will let you capture IR "Printed" output on a PC.

Here's the article: https://www.hpmuseum.org/forum/thread-1 ... #pid130564
--bob p

DM42: β00071 & 00282, DM41X: β00071 & 00656, DM10L: 071/100
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akaTB
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Re: Printing into an HP-82240A/B printer emulator; HowTo?

Post by akaTB »

This is Martin Hepperle's HP RedEye receiver with Christoph Gießelink's HP82240B simulator.

Image
Greetings,
    Massimo
ajcaton
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MeinKuipers
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Re: Printing into an HP-82240A/B printer emulator; HowTo?

Post by MeinKuipers »

rprosperi wrote:
Mon Dec 05, 2022 7:07 pm
Yes, Meindert Kuipers created a clever modern IR receiver which will let you capture IR "Printed" output on a PC.

Here's the article: https://www.hpmuseum.org/forum/thread-1 ... #pid130564
My implementation is for 99% based on Martin Hepperle's project mentioned elsewhere in this thread, and he should have all credits for the RedEye receiver.
Regards from NL,
Meindert Kuipers DM41X #48
rprosperi
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Re: Printing into an HP-82240A/B printer emulator; HowTo?

Post by rprosperi »

MeinKuipers wrote:
Tue Dec 20, 2022 5:26 pm

My implementation is for 99% based on Martin Hepperle's project mentioned elsewhere in this thread, and he should have all credits for the RedEye receiver.
Indeed, credit should also have been given to Martin as well in my post above, thanks for correcting that Meindert!
--bob p

DM42: β00071 & 00282, DM41X: β00071 & 00656, DM10L: 071/100
ecsfang
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Re: Printing into an HP-82240A/B printer emulator; HowTo?

Post by ecsfang »

Hi,

I just made one myself, following Martin and Meinderts description and it works like a charm - big thanks!

But, I noticed some problems with the DM41X. When printing eg a program (PRP), then I saw two strange behaviors (since the communication is one-way, this is present in the calculator and not the printer emulator).

Firstly (most irritating) is that the calculator locks, ie. I can't stop the printing easily with R/S. It is as if the calculator does the printing in the background and forgets to scan the keyboard. I can stop by keeping the button pressed for a longer time.

The second observation is that it start by printing ~7 lines of the program directly, but after that it prints about one line per 2 seconds (~½Hz). And I see that the IR is received in very short bursts and then are idle for a long time.

I then found the setting in the DM41X that controls the line-delay when printing (default is 1.8 sec).
Setting this to 0.2 seconds worked fine, the printing of a program goes quite quickly, but most of all, R/S works quite well too.

So, probably the DM41X doesn't look at the keyboard while executing the delay, and now that I understand the cause it is not much of a problem ;)

Thanks again Martin and Meindert for the description of the IR-receiver!
20230114_090908.JPG
20230114_090908.JPG (95.6 KiB) Viewed 1127 times
Btw, after mounting my Arduino Micro inside the receiver (with the existing led connected so that it was turned on while receiving data), I noticed that the led was red while idle and green when receiving data. I couldn't understand this, because the led is not a dual but only a single led - but then realized that I had mounted the Micro so that the power led (red) was shining through the led - making it look like it was a dual led! :lol:
[35/45/55/65/67/97/21/25/29C/31E/33E/38E/41C|CV|CX/71B/10C/11C/15C/16C/32SII/42S/28S/48GX/49G/35S/DM41X(#00456)]
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toml_12953
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Re: Printing into an HP-82240A/B printer emulator; HowTo?

Post by toml_12953 »

rprosperi wrote:
Mon Dec 05, 2022 7:07 pm
Yes, Meindert Kuipers created a clever modern IR receiver which will let you capture IR "Printed" output on a PC.

Here's the article: https://www.hpmuseum.org/forum/thread-1 ... #pid130564
Alas, only if someone would build it for me, I'd buy one. My mechanical skill is almost zero, though. I can solder and assemble through-hole kits but that's it.
Tom L

Some people call me inept but I'm as ept as anybody!
DM10L SN: 059/100
DM41X SN: 00023 (Beta)
DM41X SN: 00506 (Shipping)
DM42 SN: 00025 (Beta)
DM42 SN: 00221 (Shipping)
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MeinKuipers
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Re: Printing into an HP-82240A/B printer emulator; HowTo?

Post by MeinKuipers »

ecsfang wrote:
Sat Jan 14, 2023 2:26 pm
Btw, after mounting my Arduino Micro inside the receiver (with the existing led connected so that it was turned on while receiving data), I noticed that the led was red while idle and green when receiving data. I couldn't understand this, because the led is not a dual but only a single led - but then realized that I had mounted the Micro so that the power led (red) was shining through the led - making it look like it was a dual led! :lol:
That is a nice feature! In my unit I have programmed a heartbeat for the green LED when idle
Regards from NL,
Meindert Kuipers DM41X #48
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