Chords is an open-source toolkit developed by Upside Down Labs to transform Arduino-compatible boards into bio-potential data acquisition devices when paired with BioAmp hardware.
Note
You have to flash Arduino code to your hardware from the list below to use these tools.
Important
Make sure to select your board type in the firmware file for it to work properly.
Tip
Only use genuine board to avoid noisy (unusable) signals and connection issues.
| Board | Voltage | Channels | Resolution | SamplingRate | BaudRate | Code |
|---|---|---|---|---|---|---|
| STM32G4 Core Board | 3V3 | 16 | 12-bit | 500 | 230400 | STM32G4-CORE-BOARD.ino |
| STM32F4 Black Pill | 3V3 | 8 | 12-bit | 500 | 230400 | STM32F4-BLACK-PILL.ino |
| Arduino GIGA R1 (WiFi) | 3V3 | 6 | 16-bit | 500 | 230400 | GIGA-R1.ino |
| Raspberry PI Pico | 3V3 | 3 | 12-bit | 500 | 230400 | RPI-PICO-RP2040.ino |
| Arduino UNO R4 Minima/WiFi | 5V | 6 | 14-bit | 500 | 230400 | UNO-R4.ino |
| Arduino NANO Classic | 5V | 8 | 10-bit | 250 | 115200 | AVR-NANO-UNO-MEGA.ino |
| Arduino UNO R3 | 5V | 6 | 10-bit | 250 | 115200 | AVR-NANO-UNO-MEGA.ino |
| Arduino Genuino UNO | 5V | 6 | 10-bit | 250 | 115200 | AVR-NANO-UNO-MEGA.ino |
| Arduino MEGA 2560 R3 | 5V | 16 | 10-bit | 250 | 115200 | AVR-NANO-UNO-MEGA.ino |
| Nano Clone (CH340) | 5V | 8 | 10-bit | 250 | 115200 | AVR-NANO-UNO-MEGA.ino |
| UNO R3 Clone (CH340) | 5V | 6 | 10-bit | 250 | 115200 | AVR-NANO-UNO-MEGA.ino |
| MEGA 2560 Clone (CH340) | 5V | 16 | 10-bit | 250 | 115200 | AVR-NANO-UNO-MEGA.ino |