HP Forum Archive 21

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Use 82240B as computer printer Message #1 Posted by R. Pienne on 7 Dec 2013, 10:56 a.m. I have a HP 82240B printer, which I had been planning to use with my now-dumped HP 49g+, but I now have no IR-equipped calc to use it with, and am wondering about using it as a general-purpose printer for my PCs (both running Debian GNU+Linux). I reckon what I would need would be a USB IR transmitter (I've seen http://www.home-electro.com/tira2.php, http://www.usbuirt.com, http://iguanaworks.net/products/usb-ir-transceiver/, but maybe there is better), driver software such as "lirc", and to write some software to make it send the right codes to the printer (ignoring CUPS). I have the 82240B "technical interfacing guide". So, does anybody here have experience of this sort of thing, and have any advice to offer? Thanks a lot. Edited: 7 Dec 2013, 11:30 a.m.

Re: Use 82240B as computer printer Message #2 Posted by Katie Wasserman on 7 Dec 2013, 11:55 a.m., in response to message #1 by R. Pienne I haven't tried driving an IR LED from a PC, but have programmed a microcontroller to drive the 82240A/B. The "technical interfacing guide" was excellent in providing all the details needed to do this. The timing is pretty critical but I found that the manual is quite conservative and that wider tolerances are actually used. In any case using a microcontroller to actually drive the IR LED is the way to go since they make it easy to get the timing just right. I described this project in some detail near the bottom of this totally unrelated thread. Note that in this case I could have used an IR LED, but since I embedded this inside the printer I didn't have to. It would be simple to modify this microcontroller to read serial data over a USB port and output it to an IR LED. However, it doesn't make use of the graphics ability of the printer so it would need some enhancement for that. -katie Edited: 7 Dec 2013, 11:58 a.m.

Re: Use 82240B as computer printer Message #3 Posted by R. Pienne on 8 Dec 2013, 6:31 p.m., in response to message #2 by Katie Wasserman OK, thanks a lot. I have no experience of microcontrollers, so I'll probably have to stick to off-the-shelf solutions. Might just go for whichever transmitter seems the best and see what I can do with it. :-)

Re: Use 82240B as computer printer Message #4 Posted by Marcus von Cube, Germany on 9 Dec 2013, 12:19 p.m., in response to message #3 by R. Pienne May I suggestiv the WP 34S?

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