BioAmp EXG Pill

BioAmp EXG Pill is a small (2.54 X 1.00 cm) and elegant Analog Front End (AFE) board for BioPotential signal acquisition that you can use with any 5v Micro Controller Unit (MCU) with an ADC. It is capable of recording publication grade BioPotential signals like ECG, EMG, EOG, and EEG without the inclusion of any dedicated Hardware/Software filter, see BioAmp EXG Pill v0.7 intro video for more info.

Software

BioAmp EXG Pill works with any 5V microcontroller with an ADC like Arduino UNO/Nano or you can use dedicated 5v compatible ADC like ADS1115. To help with signal processing and cleaning you can use the included Arduino example sketches listed below.

No.	Program	Description
1	FixedSampling	Sample from ADC at a fixed rate for easy processing of signal.
2	EMGFilter	A 74.5 - 149.5 Hz band pass filter sketch for clean Electromyography.
3	ECGFilter	A 0.5 - 44.5 Hz band-pass filter sketch for clean Electrocardiography.
4	EOGFilter	A 0.5 - 19.5 Hz band-pass filter sketch for clean Electrooculography.
5	EEGFilter	A 0.5 - 29.5 Hz band-pass filter sketch for clean Electroencephalography.
6	EMGEnvelop	EMG signal envelop detection for robotics and biomedical applications.
7	LEDBarGraph	LED bar graph showing EMG amplitude.
8	ServoControl	Servo motor control with EMG.
9	HeartBeatDetection	Standard deviation based heart beat detection algorithm.

To-Do:

No.	Program	Description
1	HeartRate	Heart rate calculation with ECG.
2	BrainWaves	Brain waves amplitude with FFT.
3	EOGController	EOG based eye movement detection (left/right) to create a game controller.
4	BlinkDetection	EOG based eye blink detection.

Note: All sketches has been tested on Arduino Nano only.

Hardware

BioAmp EXG Pill has been created using KiCad and all the design files can be found under hardware folder, including production Gerber files. Images below shows a quick overview of the hardware design.