DIY-ECG Project

Welcome to the DIY-ECG Project! Tinker with ECG at your fingertips.
DIY-ECG Logo

How does it work

DIY-ECG is a project to make ECG easy accessible to everyone! DIY-ECG has two components. 1. ECG-DIY-Kit The ECG-DIY-Kit is a battery-powered device that can record an ECG on the fingers of the left and right hand. The measured data is transmitted via Wi-Fi (UDP). 2. Raspberry Pi 4 A Raspberry Pi 4 acts as the receiver. A GNU Octave script perform the signal processing and visualizes the data on a connected monitor. ...

DIY-ECG-Kit

Overview The ECG-DIY-Kit is a battery-powered device that can record an ECG on the fingers of the left and right hand. The kit is assembled by the user. It is made up of different components: 1.Electrode PCB The main part of the kit is the Electrode PCB with Ag/AgCl electrodes (green and red) for the index finger of each hand and an quad Op Amp IC (MCP6004). 2.ADC The measured potential difference of the fingers is digitized by a 16-Bit differential ADC (AD1115) with 200 Hz sampling frequency. ...

Raspberry Pi 4

Raspberry Pi 4 The Raspberry Pi 4 (Raspi 4) is a Single-Board Computer (SBC) the size of a credit card. It features a powerful quad-core ARM Cortex-A72 processor, making it suitable for various computing tasks. With 4GB of RAM, it can handle multitasking and even lightweight desktop usage. Additionally, it supports dual 4K display output, USB 3.0, and Gigabit Ethernet, enhancing its capabilities for high-performance applications. Operation System (OS) The Raspi 4 runs “Raspberry Pi OS”, a Linux Debian-based operating system optimized specifically for Raspberry Pi devices. It includes a lightweight desktop environment, which is designed for efficiency on low-power hardware. Hence the Raspi 4 can be handled as a usual desktop computer. ...

New Version with ESP32

Overview There is a new version of the ECG-DIY kit based on the ESP32 microcontroller, replacing the previous model that used the Heltec Wifi Kit 8 with an ESP8266 (160MHz Tensilica L06). This updated version features the Heltec Wifi Kit 32 V3, which integrates the more powerful ESP32-S3FN8 with a dual-core Xtensa® 32-bit LX7 processor. Compared to the ESP8266, the ESP32 offers significantly higher performance and expanded capabilities. Notably, it provides additional 12-bit ADC channels, enabling measurement of the Active Reference Feedback (ARF) from the base plate. This allows for more robust signal quality and real-time monitoring of the body’s reference potential. ...

Assembling the PCB

1. Components The kit consists of the following components: PCB 5x 10k resistors 1x 20k resistor 1x 100uF capacitor 1x 100nF capacitor 1x IC: MCP6004-E/P (DIP-14 package) 1x DIP-14 socket 2x header pins: 1x5 and 1x3 2x Snap connector, 4 mm, for ECG electrodes

Online ECG signal

Online ECG signal Websocket Server You can tinker with ECG-signals even without a hardware-kit. A “realtime” ECG-signal is provided via the following websocket server: wss://signal.diy-ecg.org p5.js Sketch This signal can be viewed with a p5.js sketch: p5.js Web Editor. p5.js is a JavaScript-based programming environment that runs directly in a web browser. It enables visualization of signals without any further software installation.