Need Help Connecting Microphone for ECG project

[sugarmeaowl]

Re: hellppp guyzzzzz

ummm sirr what ecg leads can i use? and what about the electrodes how can i get them? i cant find them on rapidonline not even on matlab nt even on farnelll
thank you

 

[Audioguru]

hellppp guyzzzzz

Go to a medical supplies store and buy ECG electrodes and conductive jelly.

 

[sugarmeaowl]

hey sir,
iam bak and i know u wont even feel like relying me now. but i really need ur help. iam stuck big tyme and i have 10 days to finish my project . iam getting an ouptut of - 6.1b volt to use my microphone port u said i have to create an attenuator and bias it. can you help in making one attenuator ? and then how do i bias it?
to make an attenuator what step should i follow. please helppp me sirrr.. pleasee

 

[Audioguru]

An attenuator is two resistors in series to ground. the output is across the lower resistor.

A microphone input on a pc has a bias voltage for an electret mic. Block the voltage with a coupling capacitor.

The mic input on a pc probably will not pass the very low frequencies of a heartbeat.

 

[sugarmeaowl]

sirr iam having big problems in using microphone port. now may be i have to use serial port and access it in matlab. if i connect it to serial port i need analog to digital converter. which one can i use? and then i can connect it with serial port using max232 and serial connection?... i just have 5 days left and i cant show the signals on pc it is workin fine in osciloscope. but i have to show it on pc.plz help me sirr thank you.

 

[Audioguru]

sirr iam having big problems in using microphone port.

You forgot to say what are the problems so I cannot help you.

 

[sugarmeaowl]

i can access microphone port from matlab and when i get the ecg data from microphone port it is showing the graph for certain duration, but i want a live graph i do not know how can i do it? do u know any way ?

one more thing if i want to connect my circuit through serial port. for that i need an ADC converter.
which ADC converter can i use?
and then do i have to use max 232 to connect serial port?

 

[Audioguru]

Sorry, I cannot help you.
I do not know Matlab and I have never used an ADC converter and a serial port. I have never seen a mAX232.

 

[sugarmeaowl]

thats ok sirr.. so far u have helped me alot thank you very muchh