BioAmp EXG Pill

by Upside Down Labs

Professional-grade analog front-end amplification for ECG, EMG, EOG, and EEG biosensing on one tiny board

$4,277 raised

of $1 goal


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BioAmp EXG Pill Explorer Pack

Two BioAmp EXG Pill boards, 15 gel electrodes, four 3-pin angled pin headers, four 3-pin straight pin headers, six alligator clips, and two 1.5 mm electrode cables


BioAmp EXG Pill Neuroscience Ninja Pack

Eight BioAmp EXG Pill boards, 100 gel electrodes, 16 3-pin angled pin headers, 16 3-pin straight pin headers, 24 alligator clips, and eight 1.5 mm electrode cables


100 Gel Electrodes

100 gel electrodes


Recent Updates

As Featured In


"BioAmp EXG Pill is a tiny little board for biosensing that works basically with your body straight off the bat and it is quite incredible and interesting."

CNXSoft - Embedded Systems News

"BioAmp EXG Pill board can record biopotential signals like ECG (electrocardiography), EMG (electromyography), EOG (electrooculography), and EEG (Electroencephalography), or in more simple terms, biosignals from the heart, muscles, eyes, or brain..."


"Think of turning on a light with your mind, or opening a door or controlling a robotic arm or drone. All that, and many more is possible by non-invasively tapping into our body’s electrical signals."

Hackster News

"Open-hardware BioAmp EMG Pill gets a redesign, broader sensor support, and a crowdfunding campaign for mass production."



"Congratulations to the ten projects that have been selected to... continue to the finals of the 2021 Hackaday Prize! Each of these are a different take on the Reimagine Supportive Tech Challenge..."


BioAmp EXG Pill is a small, powerful Analog Front End (AFE) biopotential signal-acquisition board that can be paired with any 5 V microcontroller unit (MCU) that has an analog-to-digital converter (ADC), such as an Arduino UNO, an Arduino Nano, or an ESP32, among others. It also works with any dedicated 5 V (input range) ADC like the Texas Instruments ADS1115 or ADS131M0x, among others.

BioAmp EXG Pill is capable of recording publication-quality biopotential signals like ECG, EMG, EOG, and EEG, without the inclusion of any dedicated hardware or software filters. Its small size allows easy integration into mobile and space-constrained projects, and its powerful noise rejection makes it usable even when the device is close to the AC mains supply. Any 1.5 mm diameter wire can be used as a strain-relieving electrode cable, making BioAmp EXG Pill very cost-effective in comparison to other options.

Your One-Stop Shop for Biopotential Amplification

BioAmp EXG Pill is perfect for researchers, makers, and hobbyists looking for novel ways to sample biopotential data. It can be used for a wide variety of interesting biosensing projects, including:

  • AI-assisted detection of congestive heart failure using CNN (ECG)
  • Heart-rate variability calculation to detect heart ailments (ECG)
  • Prosthetic arm (servo) control (EMG)
  • Quantitative analysis of physical therapy for palsy (EMG)
  • Real-time game controllers (EOG)
  • Controlling LEDs via brain waves (EEG)
  • Patient monitoring

…And many more examples.

Designed to Support a Variety of Applications

BioAmp EXP Pill’s elegant design allows it to be used in three ways:

  • Its pin-header holes allow you to solder (berg strip) pin headers for easy use with a breadboard
  • Its castellated holes allow you to solder BioAmp EXG Pill directly onto a custom PCB that requires biopotential-amplification capabilities
  • Its electrode holes allow you to use any 1.5 mm diameter wire as an electrode cable with minimal strain

Features & Specifications

  • Input Voltage: 5 - 40 V
  • Input Impedance: > 35 MΩ
  • Compatible Hardware: Any 5 V MCU with an ADC
  • Biopotentials: ECG, EOG, EMG, and EEG (configurable)
  • No. of channels: 1
  • Electrodes: 2 or 3 (configurable)
  • Wearable: Yes
  • Dimensions: 25.4 x 10.0 mm
  • Designed for Use With a Carrier Board: Yes
  • Open Source: Hardware + Software

Board-Layout Diagrams

Click to enlarge

Click to enlarge


To help with signal processing and cleaning, you can use the Arduino sample sketches listed below:

1FixedSamplingSample from ADC at a fixed rate for easy signal processing
2EMGFilterA 74.5 - 149.5 Hz band-pass filter sketch for clean Electromyography
3ECGFilterA 0.5 - 44.5 Hz band-pass filter sketch for clean Electrocardiography
4EOGFilterA 0.5 - 19.5 Hz band-pass filter sketch for clean Electrooculography
5EEGFilterA 0.5 - 29.5 Hz band-pass filter sketch for clean Electroencephalography
6EMGEnvelopeEMG signal envelope detection for robotics and biomedical applications
7LEDBarGraphLED bar graph showing EMG amplitude
8ServoControlServo motor control with EMG
9HeartBeatDetectionStandard deviation based heart-beat detection algorithm
10EyeBlinkDetectionEOG-based eye blink detection
11DrowsinessDetectionDrowsiness detection using eye-blink detection.
12ClawControllerServo claw controller


BioAmp EXG PillHeart and Brain Spiker BoxMyoware Muscle SensorEEG Analog ASMMuscle Spiker Shield ProDIY Muscle Spiker Shield
Manufacturer Upside Down Labs Backyard Brains Advancer technologies Olimex Backyard Brains Backyard Brains
Compatibile Hardware 5 V MCU w/ ADC Onboard MCU 3.3 or 5 V MCU w/ ADC 5 V MCU w/ ADC Arduino UNO Arduino UNO
Voltage Rating 5 - 40 V 9 V Battery or 5 V USB 2.9 - 5.7 V 5 V 5 V 5 V
Biopotential(s)ECG, EMG, EOG, and EEG ECG, EEG EMG EEG EMG EMG
No. of Channels1 1 1 2 6 1
Electrodes2 or 3 3 3 3 3 3
Open SourceHardware + software Software only Hardware + software Hardware only Software only Software only
WearableYes No Yes No No No
Designed for Use With a Carrier BoardYes No Yes No No No
Cost per Channel$35 $150 $38 $45 $67 $65


Click to enlarge

Support & Documentation

We are enthusiastic about open hardware and open source software! You can find our extensive, open-source, CERN- and MIT-licensed hardware and software documentation in our GitHub Repository. And, if you have questions, you can reach us using the Ask a technical question form below.

Manufacturing Plan

After contacting multiple PCB-fabrication and SMT-assembly houses in India, we identified likely manufacturing partners and had them produce a batch of prototype PCBs. The quality was good, and we intend to work with them for this production run. We also contacted a few manufacturers in China, and we will stay in contact with them as a possible backup option.

Fulfillment & Logistics

After testing and packaging the production batch of BioAmp EXG Pill boards, we will send them on to Crowd Supply’s fulfillment partner, Mouser Electronics, who will distribute them to backers worldwide. You can learn more about Crowd Supply’s fulfillment service under Ordering, Paying, and Shipping in their guide.

Risks & Challenges

Despite the supply-chain difficulties that continue to plague the electronics industry, we see very little risk for BioAmp EXG Pill. This is due, in large part, to the fact that we have already procured what we believe to be a sufficient quantity of the primary IC upon which our design relies.

Funding ends on Sep 23, 2021 at 04:59 PM PDT (11:59 PM UTC)


Upside Down Labs

We work on awesome open-source projects to help you amplify your efforts and rectify your path to success!

Bhawna Sehgal

Dikshant Dahiya

Deepak Khatri

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