2024-06-13 19:21:56 +00:00
|
|
|
## Overview
|
|
|
|
|
|
|
|
Here are notes for myself and others interested in building DIY ECG
|
|
|
|
equipment. There are many ways to skin this particular err.. project,
|
|
|
|
from crude to incredibly complex. Here are lists of parts, websites,
|
|
|
|
theory, etc.
|
|
|
|
|
|
|
|
Page maintained by [User:Obscurite](User:Obscurite "wikilink") who is
|
|
|
|
working on his own ECG equipment. Enjoy.
|
|
|
|
|
|
|
|
## PARTS for higher-precision version(s)
|
|
|
|
|
|
|
|
- Instrumentation Amplifiers (not sure why these are priced so
|
|
|
|
differently)
|
|
|
|
- Both have CMMR of 110+ for gain of 1000, so they should both work
|
|
|
|
equally well. AD624AD is referenced in the sciam article, but it
|
|
|
|
also mentions the AD620A which is 1/3 the cost at about \$7.
|
|
|
|
- Cheaper version:
|
|
|
|
[AD620A](http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail&name=AD620ANZ-ND)
|
|
|
|
- Expensive version:
|
|
|
|
[AD624AD](http://parts.digikey.com/1/parts/453660-ic-amp-inst-25mhz-prec-ln-16cdip-ad624ad.html)
|
|
|
|
- Better op amp - OP97 (need to review data sheet)
|
|
|
|
|
|
|
|
## PARTS for basic version(s)
|
|
|
|
|
|
|
|
- LM358 (dual opamp) or LM324 (quad opamp), or LF353 (which is pin
|
|
|
|
compatible)
|
|
|
|
- Diodes
|
|
|
|
- 0.1uF capacitor(s)
|
|
|
|
- Variety of 1/4 watt resistors (10k, 100k, etc)
|
|
|
|
- shielded wires for electrodes (phone or coax cables)
|
|
|
|
- electrodes (soldered pennies, medical electrodes, etc)
|
|
|
|
- diodes (1N4001)
|
|
|
|
|
|
|
|
## Microcontrollers and FPGAs
|
|
|
|
|
|
|
|
- Atmel atmega168/328 has onboard ADC
|
|
|
|
- Xilinx Spartan3E dev board has built in ADC
|
|
|
|
|
|
|
|
## References
|
|
|
|
|
|
|
|
These sites, papers, and articles provide info on ECG making, A/D
|
|
|
|
conversion, signal processing, projects, and general theory:
|
|
|
|
|
|
|
|
General info:
|
|
|
|
|
|
|
|
- [OpenECG Project](http://www.open-ecg-project.org/tiki-index.php)
|
|
|
|
- [Scientific American, Shawn
|
|
|
|
Carlson](http://www.scientificamerican.com/article.cfm?id=home-is-where-the-ecg-is)
|
|
|
|
- [AVR ADC tutorial (a little
|
|
|
|
old)](http://extremeelectronics.co.in/avr-tutorials/using-the-analog-to-digital-converter/)
|
|
|
|
- [wikipedia ECG
|
|
|
|
article](http://en.wikipedia.org/wiki/Electrocardiography)
|
|
|
|
- [EKG Report from ITP (describes the Ramsey kit circuit,
|
|
|
|
etc)](http://itp.nyu.edu/physcomp/sensors/Reports/EKG)
|
|
|
|
|
|
|
|
DIY Projects (some with tutorials):
|
|
|
|
|
|
|
|
- [DIY ECG, Scott
|
|
|
|
Harden](http://www.swharden.com/blog/2009-08-14-diy-ecg-machine-on-the-cheap/)
|
|
|
|
- [DIY ECG Improvements (based on Jason Nguyen's 6 opamp design), also
|
|
|
|
from Scott
|
|
|
|
Harden](http://www.swharden.com/blog/2009-01-20-diy-ecg-improvements/)
|
|
|
|
- [DIY ECG, Jason
|
|
|
|
Nguyen](http://www.eng.utah.edu/~jnguyen/ecg/ecg_index.html)
|
|
|
|
- [ECG Measurement System, Chia-Hung Chen, Shi-Gun Pan, Peter
|
|
|
|
Kinget](http://www.cisl.columbia.edu/kinget_group/student_projects/ECG%20Report/E6001%20ECG%20final%20report.htm)
|
|
|
|
- [DIY ECG howto (AD620A and OP97 used in schematic) by Refik
|
|
|
|
Hadzialic](http://www.radiolocman.com/shem/schematics.html?di=47010)
|
|
|
|
- [Refik Hadzialic's AVR ADC code for his
|
|
|
|
ECG](http://www.rlocman.ru/i/File/2008/04/15/egg.txt)
|
|
|
|
- [Holter ECG based on AVR by Dragisa
|
|
|
|
Jankovic](http://www.gilefx.com/avrecg.htm)
|
|
|
|
- [also an ARM based Holter ECG by Dragisa
|
|
|
|
Jankovic](http://www.gilefx.com/armecg.htm)
|
|
|
|
- [Homemade EKG by Jake Haglund](http://www.diyhappy.com/homemade-ekg)
|
|
|
|
- [Dual-purpose EEG/EKG by artist/composer Adam
|
|
|
|
Overton](http://plus1plus1plus.org/Resources/EEG-EKG)
|
|
|
|
|
|
|
|
Kits:
|
|
|
|
|
|
|
|
- [Ramsey ECG
|
|
|
|
kit](http://www.ramseyelectronics.com/cgi-bin/commerce.exe?preadd=action&key=ECG1C)
|
|
|
|
|
2024-06-13 01:48:44 +00:00
|
|
|
[Category:DIY_ECG](Category:DIY_ECG "wikilink")
|