Post by chuck on May 29, 2023 13:42:35 GMT
Just finished drawing up a velocity capable keys scanner based on the rp2040 and sent off four four boards.
Sixteen of the pins are a dedicated one-of-sixteen circuit, sixteen more are just 5v (divided down to 3.3v) inputs, and then there are three analog inputs (also divided down) as well as 5v and ground on the 40 pin header, with midi in and out on separate connectors.
It occurred to me that it could be neat to expose those pins up to the faceplate instead of down to a ribbon connector... slow down that one-of-sixteen output from MHz to beats-per-second and it could be a sequencer with the pico brain listening to its inputs on how to change the sequence up.
I used up all the PIO with keyboard scanning because I wanted it to be very fast and handle 88 keys x 2 but maybe after debugging this board I'll spin another one that does some spi output to some more analog and digital pins... there are a few left on the connector and that could make the board more general purpose.
Anyway, thought I'd share my own DIY module experiments!
Sixteen of the pins are a dedicated one-of-sixteen circuit, sixteen more are just 5v (divided down to 3.3v) inputs, and then there are three analog inputs (also divided down) as well as 5v and ground on the 40 pin header, with midi in and out on separate connectors.
It occurred to me that it could be neat to expose those pins up to the faceplate instead of down to a ribbon connector... slow down that one-of-sixteen output from MHz to beats-per-second and it could be a sequencer with the pico brain listening to its inputs on how to change the sequence up.
I used up all the PIO with keyboard scanning because I wanted it to be very fast and handle 88 keys x 2 but maybe after debugging this board I'll spin another one that does some spi output to some more analog and digital pins... there are a few left on the connector and that could make the board more general purpose.
Anyway, thought I'd share my own DIY module experiments!
