HP HP41

24 discussions on ElectronDepot about the HP HP41: what owners asked, what went wrong, and what fixed it.

What owners report

2066-pin processors

I enjoyed huge success with my last home-made computer. 2011-pin Intel processor, four 128-bit memory channels. Now I'm going for Core i9 X299 and LGA 2066 pins. More pins are better. -- Thanks, - Win

Guess what I found

I found a HP-25 programmable calculator from about 1975 at a swap meet for $3 and it works. Complete with owner's manual, charger and applications does 49 steps and records the keys used. The battery pack and leather case were missing...

Dimensionierung einer MOSFET Gegentaktendstufe

Hallo!Ich m=F6chte einen Verst=E4rker bauen der ein +- 5V Signal auf +-400Vverst=E4rkt. Als Last h=E4ngt ein Piezotransducer am Ausgang. DerPiezotransducer (Sonotec, Modell IW-1-20) hat eine Nennfrequenz von1MHz. Er kann als kapazitive Last...

Pi approximation games

Instead of doing productive work, I just spent a few enjoyable minutes with Scilab finding approximations to pi of the form m/n.Because I'm posting to a couple of nerd groups, I can be confident that most of you probably know 22/7 off the...

Pi approximation games

Instead of doing productive work, I just spent a few enjoyable minutes with Scilab finding approximations to pi of the form m/n.Because I'm posting to a couple of nerd groups, I can be confident that most of you probably know 22/7 off the...

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