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Adding Bioimpedance (ECG, EEG, EMG) to The Platform with ADS1292 ECG Activity Trackers

A project log for Hacking Wearables for Mental Health and More

Presenting the "Tingle" wearable for compulsive behaviors and a hacked fitness tracker wearable device prototyping platform.

Curt WhiteCurt White 08/27/2018 at 05:270 Comments

Their are a number of nRF52832 activity trackers which contain the Texas Instruments ADS1292 ECG front-end IC, for example the B20 (links 1 2 3 4 5 6 7 ), the CK12 (links 1 2 3 4 5 ), the G20 (links 1 2 3 4 5 ), and the B9 (links 1 2 3 4 5 ). Although the ADS1292 is marketed for ECG, it is part of a family of chips focused on an array of bioimpedence applications and there is no particular reason it can't be used for simple experimental EEG and EMG projects.

I have provided an in depth tutorial on hacking the B20 activity tracker and applying FIR (Frequency Impulse Response) and FFT (Fast Fourier Transform) analysis to the devices ADS1292 data in this project: https://hackaday.io/project/160618-hacking-a-35-ecg-nrf52-fitness-tracker-into-eeg.

I have added an Arduino Core variant file to the project GitHub repository for the B20 as well as code examples for EEG with FIR filters, EEG with FFT and ECG with Protocentral's Processing application.

B20 ECG Fitness Tracker Specs:

B20 nRF52832 MCU Pinout

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