Guru
Joined: 24/12/2017
Location: AustraliaPosts: 1694
| Posted: 04:02am 18 Feb 2024 |
Thank you, I don't see any reference to that circuit on the Github site but I do see plenty of references to level shifters. I cannot see how it adds anything worthwhile to the circuit. It will not reduce the 5v logic levels to safe limits.
The output impedance of the keyboard's data line may be high enough to limit the current to a safe level for the Pico's input protection to handle, but that will depend on the individual keyboard and your luck.
Bill