Difference between revisions of "SYNTH-MIDI-CTL-01"

Revision as of 10:42, 12 October 2022

Adapted from HAGIWO's MIDI to CV module
- Translate from Japanese to English using browser
XAIO RP2040 CPU
- Arduino MIDI library has not yet been ported to Pico so will need to use CircuitPython MIDI Library
MIDI In/Out
- Standard MIDI Jacks
- MIDI out jack for future functionality
(2) 0-5V Analog CV outs
- MCP4822 12-bit D/A - SPI Interface
  - MCP4822 Datasheet
- Use with SYNTH-VCO-01
  - CV1 = V/OCT
  - CV2 = MOD
(2) Digital Outs, eX:
- Gate
- Clock
Pot supports setting Clock rate
Standard EuroRack 16 pin header
- Supports 12V in with on-board 5V regulator
- 5V regulator can be not installed if 5V is available on EuroRack connection
Card is not a Eurorack card
- Probably too deep, needs cabling
(6) 6-32 Mounting holes
- Stacks with SYNTH-VCO-01 card

SYNTHMIDICTL01 - Arduino Software
synth_midi_ctl_01_001.py
- Toggles the GATE, CLK lines
synth_midi_ctl_01_002.py
- MIDI over USB
- Parses MIDI messages
- Pick out single notes since SYNTH is monophonic

D9 s/b 1N914
s/s R1 has 1K, P/L has 2.7K
R1 pullup could be moved to Vcc (+5V)
DIN-5 J4 could use a 0.1uF cap to logic ground
J1 fits with a shrouded connector has some interference with Voltage Regulator U1
U4 is connected to 5V power but drives into XIAO - needs to be clamped to 3.3V
Cut trace U4-10 (RXD) front side
Add wire U4-13 to U2-8 (RXD)

@@ Line 63: / Line 63: @@
 ** MIDI over USB
 ** Parses MIDI messages
-** Pick out single notes
+** Pick out single notes since SYNTH is monophonic
 == Issues ==