Red LED displays

[Jim Horn]

That LCD looks good. However, I still like the look of "real" LEDs. Reusing the original HP-25 display will ensure proper fit in the case behind the red window, too.

Development environment? I've not given that much thought yet, nor for which CPU to use. Having used the Cortex M-32 parts, the ARM environment is tempting even though those parts would be vast overkill. It is amazing what you can get in such a small package for a few dollars today...

With so many irons in the fire already, this project is on indefinite hold. But I hope to get into it before the year is out. I'm not in the class of the superb WP 34S team or the many other Forum regulars who have done marvelous things. But it would be nice to have my first calculator working again!