make-42 / pTuna

An open-source DIY guitar tuner.

pTuna

An open-source DIY guitar tuner.

Changelog

 - Alpha 1.0.9:
    - New splash screen
    - New boot animation
    - Slightly better code performance
    - Overclocked processor from 125MHz to 150MHz.
    - Version bump: v1.0.1 -> v1.0.9

BOM (Prices in France as of June 2022)

• Raspberry Pi Pico (€ 4)
• SSD1306 OLED Display (€ 1.73)
• Adafruit PDM MEMS Microphone Breakout (Product ID: 3492) (€ 4.62)
• CR2032 (Battery holder) (€ 0.50)
• Toggle switch (€ 0.50)
• Wires (€ 0.40)

Total: € 11.75 (excluding shipping)

Note: If you are in Paris I'd definitely recommend letmeknow for getting parts. The prices are affordable and the staff lovely!

Building firmware

• Clone this repo
• Run this command:

cd ./pTuna/Firmware/final/

• Edit build.sh to point to your pico SDK folder.

• Build with:

sh build.sh

Wiring

Schematic