Arduino Teensy Groovebox 8 Encoders OLED screen Part 3

Developing a MIDI sequencer using the Teensy 4.0 and some rotary encoders.
How to use the extra pins underneath the Teensy 4.0
Here's a simple Arduino sketch for blinking a series of pins. It's useful when checking that wires have been soldered correctly:
github.com/Nor...
This is a basic test script for checking the rotary encoders and OLED are connected correctly.
github.com/Nor...
/*
Teensy 4.0 Experiments with 8 PDVC Rotary Encoders and OLED Display
- Reads values from 8 rotary encoders (A, B, C, D, E, F, G, H)
- Scrolls through a truncated set of musical notes (C2 to C4) based on encoder positions
- Displays the musical note corresponding to each encoder on the OLED screen
- Uses a global variable to set a default start note (C2 in this example)
- Encoder values are mapped to note names and displayed on the screen
Hardware:
- Teensy 4.0 board
- 8 rotary encoders (A, B, C, D, E, F, G, H)
- OLED display (128x64)
Libraries:
- Adafruit_SSD1306 (For the OLED)
- Encoder (For reading the rotary encoders)
- SPI (For communication)
- Wire (For I2C communication)
Written by Nordl3, 2023
*/

[@jkuebler89]

Cool trick with the baking soda, never knew you could do that. I work in industrial and every time we have electronics fail I love taking apart to see internals before e-waste. Everything is coated in epoxy to make it industrial grade, sensors, light curtains, VFD PCBs. Pretty cool. Those Teensys are so versatile. And they are from my town Portland OR. Are the notes quantized or are the numbers you scroll thru the cents in between? You got something cooking here brother!

[@BarryAnthonyMallett7777]

Unbelievably talented, closest I came to a breadboard was making my sandwiches 😅

[@theboytheycalljonny1]

How many grams will the BOM have listed?