This is a version of my Raspberry Pi Pico MIDI Splitter that omits the MIDI sockets and instead provides a 5V UART TX style output for use directly with 5V microcontrollers.
Tutorials used in this project:
If you are new to microcontrollers, see the Getting Started pages.
The Circuit
I've kept the buffered IO for the MIDI OUTs, using 74HCT14 hex inverters once again to level shift between the 3V3 world of the Pico and the required 5V output.
UART 0 is still directly connected to a proper MIDI DIN IN and OUT port.
PCB Design
Dispensing with MIDI sockets means I've been able to shrink the board down compared to the "full" version.
The UART MIDI IN/OUT breaks out on the right hand side of the board after my standard 3V3 MIDI IN and OUT circuits. All the buffered PIO MIDI OUT ports are over on the left. The Pico itself sits between the two, with USB on the top edge, and can be mounted using header sockets or via a direct SMT soldering.
The TTL serial outputs are just a TX and GND link - so two header pins per port.
Closing Thoughts
If this one works, this will be exactly what I need for my Lo-Fi Orchestra, so I'm looking forward to getting this one back.
Once again, I've been able to use some of my discount vouchers with Seeed Fusion to get this board sent off. In fact, this is the first of a new batch that I've just sent off.
Kevin
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