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MCU - Teensy LC

Manual: HERE    Schematic: HERE     Purchase: HERE  CPU Datasheet: HERE     Teensyduino info: HERE

Also sold on Amazon and Adafruit (pricier)

Secondary MCU - Arduino Nano

User Manual: HERE       Purchase: HERE  (I buy clones)

Schematic: HERE  

VS1053B Codec (+ Breakout)

Datasheet: HERE

Additional Considerations: HERE

Board Library: HERE (not needed for MIDI mode)

LiPo Battery Charging Circuit (V2)

This one looks good. Need a boost converter to use.

LiPo Rechargeable Battery (V2)

Just a 3000mAh off Amazon. Needed to flip the connector on the end to have the right polarity.

MIDI Port (V2)

Information (+ Useful Diagram): HERE

Mechanical Keyboard Switches

I'm going to use Kailh Browns because they're quiet and cheap. Equivalent to MX Browns but cheaper. Ordered off of Novelkeys. Equivalent Datasheet HERE

Keyboard Switch Hot Swap Sockets

Using Kailh sockets, will require either surface mount or a 3D printed mount. Modified a 3D mount from Thingiverse to have wings and pegs for attaching into a mounting plate. Designed the matching mounting plate.

3.5mm Jack

A standard panel mount 3.5mm jack. I used this one from Adafruit - HERE 

Keycaps

Used some typewriter keycaps from Thingiverse, scaled to 108%.

Audio Amp - 3.7W Class D

Datasheet: HERE   Purchase: HERE   More Info: HERE 

Speakers - 3W 4 Ohm

Purchase/More Info: HERE 

Originally used these cheap paper ones

Switching Diodes - 1N4148

Datasheet: HERE   Purchase: HERE  

Micro USB Port/Breakout

Purchase: HERE  

These are pretty standard.

Boost Converter (V2)

Just picked one off Amazon that looked good. 

4081N AND Gate (V2)

Datasheet: HERE       Purchase: HERE

Level Shifter

Datasheet: HERE       Purchase: HERE

HD44780 LCD

Datasheet: HERE      Purchase: HERE   I2C Library: HERE

Trimpots (V2)

Datasheet: HERE      Purchase: HERE

Trimpot knobs (V2)

Small:  HERE     Large:  HERE

Joystick (V2)

Purchase: HERE

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