HP-25C Eumulator
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10-07-2014, 06:47 PM
Post: #32
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RE: HP-25C Eumulator
(10-07-2014 06:15 PM)Chris Chung Wrote: It's far from me (I am in Canada), and I ordered units for 5 builds, will see when they arrive. I am in Ottawa so may be close to you -- give or take up to about 4300 klicks :-) More if you are in Nunavut. (10-07-2014 06:15 PM)Chris Chung Wrote: With the current firmware, it's a fix and go at the moment (currently I still have issues w/ saving and loading program steps) and the firmware must be tested more before I can assemble kits. I would like to ship 1 unit to a tester before making the 10 or so kits available. Ideally someone who is familiar w/ HP-25C, 33C (programming too) and preferably have some electronics background, may be able to flash firmware updates? (I used a $10 TI Launchpad G2 as programmer). Any taker? The tester will have the unit in my last video (the one w/ 2 batteries). I can tweak the firmware based on a tester's feedback and review. I'm am electronic eng who broke out his real 25 partly because of this project. I spent some of the weekend pouring over your and Eric's code to see how things worked. If you are stuck I might be able to help. Used to have a 33E as well. Really interested in the 34C version as well. (10-07-2014 06:15 PM)Chris Chung Wrote: The display is not bright, you cannot read the display outdoors, and difficult to read beside a bright window. AFAIK, no red LED calculator can be read outdoors in bright light. Not limited to this machine. They don't work too well under "red-light' conditions either I heard (recall reading something about nuclear submarines and the classics a while back). |
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