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Calculator displays
06-20-2018, 01:06 AM
Post: #21
RE: Calculator displays
One year before, I discovered this backlit LCD module.
With minor modification to my HP-10b (which is in a pioneer series chassis), this module can substitute the original LCD almost perfectly (The new module is a little bit narrower, requiring some black tape to hide the edges).

One downside is that the PPI and resolution combination is not very suitable for the opening on a pioneer(or at least on the 10b), which means the texts are gonna be either too small or too big (2X) if one is planning to emulate an HP-42s display.

https://item.taobao.com/item.htm?spm=a1z...3vl4of92b2

The controller IC on it is UC1604c. I don't know if there's any international seller of this module out there. I'd like to help if anyone is willing to use this module.

Vintage HP handheld user
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06-20-2018, 04:06 AM
Post: #22
RE: Calculator displays
Keep in mind that any of the displays that put out light, whether OLED, LED, VFD, backlit LCD, plasma, or anything else I might be forgetting, will be battery hogs. I suppose I can sort of understand the lure of old-time red LED 7-segment displays; but I sure don't want to have to charge my calc every night. Reflective LCDs (the kind that are optimized for using ambient light only, and produce no light on their own) were a godsend, and it was so nice to be able to even years without thinking about my batteries.

http://WilsonMinesCo.com (Lots of HP-41 links at the bottom of the links page, http://wilsonminesco.com/links.html )
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06-20-2018, 06:01 AM
Post: #23
RE: Calculator displays
(06-20-2018 04:06 AM)Garth Wilson Wrote:  Keep in mind that any of the displays that put out light, whether OLED, LED, VFD, backlit LCD, plasma, or anything else I might be forgetting, will be battery hogs. I suppose I can sort of understand the lure of old-time red LED 7-segment displays; but I sure don't want to have to charge my calc every night. Reflective LCDs (the kind that are optimized for using ambient light only, and produce no light on their own) were a godsend, and it was so nice to be able to even years without thinking about my batteries.

That's true, but for the old Classics I think the LED still reigns supreme.

I had the MultiCalc running 24/7 on a 3.7V LiPo battery with 50% of the LED display on. Still working fine after 7 days with plenty left in the battery.

cheers

Tony
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