HP41C with Rp Pico attached
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12-02-2023, 10:49 AM
Post: #47
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RE: HP41C with Rp Pico attached
(12-02-2023 10:25 AM)Tinue Wrote: Thank you for the video, I found it very interesting. How do you interface electrically with the HP 41? I assume it is a 5V device, while the RP2040 uses 3.3V.Just simple level shifters. I have a few interfacing boards left from my MLDL2000 activities. I use a CD4050 for downshifting, and an HCT125 for upshifting to 6V (HP41 is around 6V). For shifting up to 6V a 40109 would be a bit better. Regards, Meindert |
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