Panamatik’s Woodstock Low Power is an Incredible Product

[PANAMATIK]

(01-25-2018 03:05 PM)Maximilian Hohmann Wrote:  This it was! Now it works as expected ...

And just to confirm: Is it safe to operate the calculator with 3V, e.g. by using two normal alkaline batteries? Not that I want to waste batteries, but at my current 2,4V the display is quite difficult to read in daylight.

Regards
Max

Congratulations !!! I hope you accept my apologies for the wrong HP-21 wiring, which I made. My prototypes both were HP-21 boards. After testing all LP boards on my HP-21, I had to resolder the 6-pin connector before shipping, and obviously I forgot it in your case.

The LP can be driven with 3.3V (up to 4 V maximum rating according to datasheet, but I never tried that). No problem with alkalines. I think the display will also be bright enough at 2.8V with NiMh.

Bernhard