HP41C with Rp Pico attached

[blackjetrock]

(06-01-2023 02:22 PM)ThomasF Wrote:  

(06-01-2023 06:11 AM)blackjetrock Wrote:  unfortunately the RP2040 (Pico IC) isn't a very low power device. It is low-ish power consumption so battery power is definitely an option but it isn't anywhere as low power as the HP41C itself, for instance.

Yes, that I have realized, but I was thinking of having a battery for the Pico.
Ie using something similar to this.

(06-01-2023 06:11 AM)blackjetrock Wrote:  Is the card reader well documented?

Not that I'm aware of, that's why I thought of looking at the Wand, I think it would be easier ...

Cheers,
Thomas

Last time I was designing a Liion battery charger I have severe problems getting the ICs. Hopefully that situation will ease eventually.

Andrew