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HP 41(CX) - ADDING MEMORY
05-16-2019, 01:27 AM
Post: #9
RE: HP 41(CX) - ADDING MEMORY
One limitation to interfacing to the HP41 bus, particularly for an Arduino, is the 6 Volt (I measure around 6.3V) operating voltage. Only a few PIC processors are rated 7V max. You could use level translators as Monte did with the 41CL or resistive dividers as he did with his fpga module.

That's a lot to squeeze into a little module housing, which makes Diego's Clonix/NoV implementations all the more amazing. You would probably want to start by making a breakout cable from an old memory module so you could work at the breadboard level.

Who decides?
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Messages In This Thread
HP 41(CX) - ADDING MEMORY - Artur - Brasil - 05-15-2019, 01:25 PM
RE: HP 41(CX) - ADDING MEMORY - EugeneNine - 05-15-2019, 05:28 PM
RE: HP 41(CX) - ADDING MEMORY - mfleming - 05-16-2019 01:27 AM
RE: HP 41(CX) - ADDING MEMORY - Diego Diaz - 05-16-2019, 02:30 PM



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