Hello everybody , I'm intersted in building an ECG sensing module using some analog filters and digitize them , so is there anyone who could help.
THANKS

 

Hi,
Maybe you can use this as a starting point:

http://www.sensorsmag.com/articles/0...199/main.shtml

TOK

 

Thanks a lot Gorgon ,that's will be helpful as introduction.
I have done some search and came out with the following points:
-The ECG signal should pass through noise reduction( using notch filter) and some low pass filters.
-Then the clean(as I hope) analog signal will be an input to an ADC to output a digital data stream ( I found a 12 bit ADC)
At this point ,I want to interface that serial output through a wireless module to a PC to visualize the signal and analyze it.
I think there is a "serial to ethernet module" from IPSIL inc but i didn't find any useful information about it even on their site.
Is there an alternative low-cost wireless solution ?

 

Why 12 bit?, attempting to utilise that degree of resolution makes it MUCH more difficult, and the layout critical - as the lower bits are only likely to disappear in the noise. Using a cheap PIC with internal 10 bit A2D would be simpler, and probably still give more resolution than you really need.

What about wireless free radio modules, you're only reading very low frequencies, so don't need a very fast data rate.

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