Guru
Joined: 05/10/2019
Location: United KingdomPosts: 9179
| Posted: 10:19am 18 Feb 2024 |
You can probably simply power the keyboard from 5V but via a silicon diode. I doubt if any will complain about losing 0.6V. The maximum voltage on the pins can only be a current-limited 4V4 then, which (according to Raspberry Pi) the Pico will withstand.
As I said, Bill - the "CMM1.5" usb system seems to work well. You do need a USB-TTL converter for the console & power connection though.
Edited 2024-02-18 20:21 by Mixtel90