HP Forum Archive 21

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Self-made WP-34s flashing cable? Message #1 Posted by Victor Koechli on 6 Aug 2013, 3:05 a.m. This has most likely been discussed before, but I seem to be unable to find the answer: What's necessary to build a flashing cable for the HP-20 / HP-30? Is it a simple cable with an admittedly special connector, or is there more to it? Does anyone have the schematics? I'm asking because I'd like to build a WP-34s but seem to be unable to acquire one of these (accurately dubbed 'unobtainium') cables... Kind regards, Victor

Re: Self-made WP-34s flashing cable? Message #2 Posted by Didier Lachieze on 6 Aug 2013, 3:19 a.m., in response to message #1 by Victor Koechli A lot of details here: Homemade ARM-based Calculator Programming Cable

Re: Self-made WP-34s flashing cable? Message #3 Posted by Victor Koechli on 6 Aug 2013, 3:45 a.m., in response to message #2 by Didier Lachieze Excellent, thanks a lot!

Re: Self-made WP-34s flashing cable? Message #4 Posted by rpn fan on 6 Aug 2013, 1:36 p.m., in response to message #2 by Didier Lachieze Now that's something I can reasonably do! It does amaze me that there isn't a connector around that can handle the physical interface if not the whole cable.

Re: Self-made WP-34s flashing cable? Message #5 Posted by rpn fan on 6 Aug 2013, 10:06 p.m., in response to message #2 by Didier Lachieze If I bought the terminal strips I would have a lot of strips leftover. I wonder how much it would cost to 3d-print a mounting block? It's basically a rectangular block with 6 holes in it. It would make it more stable.

Re: Self-made WP-34s flashing cable? Message #6 Posted by Walter B on 6 Aug 2013, 4:12 a.m., in response to message #1 by Victor Koechli I'd suggest you get a USB board from Harald Pott instead - then you can use a standard USB cable. d:-)

Re: Self-made WP-34s flashing cable? Message #7 Posted by Les Wright on 15 Aug 2013, 10:11 a.m., in response to message #1 by Victor Koechli Victor, I have a pristine cable that is not working because I clumsily broke off one of the pins. This was almost two years ago when plenty of them were extant and Gene sent me another. I am sure the working aspects of this dead one can be harvested. Please take it off my hands. I would ask for only postal costs. leslie dot wright at rogers dot blackberry dot net, if you wish. Les

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