IMPORTANT: DO NOT USE THESE FOR ANYTHING YET, THEY ARE VERY MUCH PROTOTYPES AND HAVE SOME PROBLEMS!!!!

Files for PCB modules for use by usb_midi_clocker project.

Todo

General

• IMPROVE: reduce size of jack holes to make a snugger fit with less wobble?
• IMPROVE: Some nice panel graphics!

Main module

Main module board

• DONE/UNTESTED: FIX: Replace the voltage regulator with one that will actually be able to deliver enough amps to power the screen and Teensy facepalm
• Can work around this for the moment by connecting directly to 5v Eurorack power with eg Dupont cables
• FIX: Fix/bridge/remove power diode that prevents power from USB going to screen
• IMPROVE: Make the i2c port into a 2x5 connector
• IMPROVE: Add 100ohm resistors on the SPI connectors

Main module panel

• DONE/UNTESTED: IMPROVE: Cutout for display pins in order to allow the panel to sit flat on top of the display without bending like it currently does?
• DONE/UNTESTED: FIX: Make the encoder hole bigger, so that the encoder will fit through

Gate expander

Gate expander back board

• FIX: ?? fix whatever the problem is that is making SPI is unreliable af and lights randomly seeming to not go off
• FIX: one of the protection diodes isn't connected to ground
• FIX: eratic behaviour where LEDs stay lit, don't light up properly, etc
• FIX: when put into 'inputs' mode, all seem to read HIGH when there isn't anything connected?
• FIX: when put into 'inputs' mode, two of the SEQUENCER channels randomly flicker on/off...?
• FIX: the switch pins currently connect tip to ground; should this go through a resistor? or not happen at all?
• FIX: layout of the 'sequencer' outputs isn't right, for unknown reasons? (worked around in software)

Gate expander panel

• IMPROVE: make reversible in / out, or label as CLOCK / SEQUENCER

CV Input expander

CV Input board

• IMPROVE: make header 2x5 instead of 2x4?

MIDI expander

• Seems to be working on first attempt!
• IMPROVE: pitch spacing of the resistors/capacitors to allow common components to fit a little better (slightly wide resistor spacing, slightly narrower capacitor spacing)
• IMPROVE: maybe add protection diodes to protect the Teensy's GPIO pins in the event of wrong thing being connected?

USB+SD expander