Classic calculator display chip type number?



#5

I am searching for spare display chips for the classic calculator series, for example HP-65. If I remember correctly Hewlett Packard made them themselves, but it would be helpful to know the exact type number for starting a search?
Thank you!


#6

I probably have a spare one. I can check on the weekend.

#7

The part number is HP 1990-0335. Further information is available here: HP Classic LED Display Information

You need not search the Internet for them, you will not find them as spare parts. Just buy an old HP45 and part it out.

#8

Depends on whether you're talking about the anode driver chip, or the cathode driver chip.


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