Comments on: Building a simple ECG Amplifier

By: Sebastian Schaetz

Sebastian Schaetz — Thu, 08 Jul 2010 08:09:33 +0000

The circuit uses the TLC274, an operational amplifier.
I’m not sure if the circuit could properly amplify from .5 to 100Hz, but I believe so.

By: nuhri

nuhri — Wed, 07 Jul 2010 17:51:58 +0000

hi, i just wanna ask if this circuit can detect waveforms whose frequency range is from 0.5 Hz to 100 Hz. also, does this circuit include an instrumentation amplifier? if yes, what type of Instrumentation amplifier does this circuit use? thanks much. :)

By: Sebastian Schaetz

Sebastian Schaetz — Sun, 29 Nov 2009 12:05:36 +0000

can we use this project to diagnosis purpose?

Absolutely not.
The heartrate should be 1/(period of ecg signal).

By: kumar

kumar — Fri, 27 Nov 2009 18:40:54 +0000

can we use this project to diagnosis purpose?
how to calculate the heart rate using the wave we obtained?
reply very soon

By: asif

asif — Tue, 20 Oct 2009 13:36:34 +0000

Danke Sebestian….es hat geklappt.

By: Sebastian Schaetz

Sebastian Schaetz — Wed, 14 Oct 2009 08:43:47 +0000

tolman:
P1 is a potentiometer (http://en.wikipedia.org/wiki/Potentiometer) It is used to configure the common mode rejection ratio (http://en.wikipedia.org/wiki/Common-mode_rejection_ratio)

asif:
IC1c amplifies the common mode signal 31 times and puts it on the right leg. This has two effects. 1. the body is brought to a defined common mode level to keep the signals from the hands inside the input range of the amplifier. 2. the common signal is degenerated to achieve a even better common mode rejection. (this is translated from the original Elector Article)

Hope this helps,
Sebastian

By: asif

asif — Tue, 13 Oct 2009 14:57:07 +0000

hi sebestian,
ich habe eine frage und zwar
nach welchem Prinzip hast du EKG gemessen?
Was für eine Role spielt hier rechtes Bein?
wie kann man d. Ausgangsignal mit Ozsilloskop messen (bzw. wie soll ich die verbindung zwichen Ozsilloskop und d.Ausgangsignal darstellen)?

auf eine schnellere Antwort werde ich sehr dankbar sein.
mfg
asif

By: gaurav

gaurav — Tue, 13 Oct 2009 02:53:54 +0000

yaa same questions as posted by tolman.

Please response these questions as soon as possible.

I have to submit my project within 15 days.

hoping for your enormous help for us…….

By: tolman

tolman — Sun, 11 Oct 2009 06:43:07 +0000

sorry for another question………
I am the beginner of the project, so i have not enough knowledge of the circuit element.
In the circuit what is that P1 ( cw 5k) near the last terminal of the opamp?

By: tolman

tolman — Sun, 11 Oct 2009 06:27:51 +0000

thanks a lot for your reply.
i need your additional support.
Can you send me any circuit with detail explanation for the wireless transmission of this ECG signal.