ECG with osciloscope output and serial communication

[aikiotto]

osclioscope

Greetings , I'd love your suggestions and ideas for the following project:

An ECG Monitor wich output must be viewed on a regular Osciloscope , data must be captured , converted to digital (8 bit conversion) transmited via serial , received and converted back into analog form then viewed on a scope.

As of now we're thinking of using PIC16f877 ADC to obtain, convert and transmit the signal over to a 2nd PIC wich will receive then send the data over to a DAC0808 then onto the Scope.

Suggestions? tips? all welcome

 

[dilshan]

ecg amplifier serial

According to your explanation, you’re trying to do this,

Analog Source -> ADC -> Tx -> Rx -> DAC -> Input to Scope

Theoretically this is good approach, but during the designing stages please consider about following points also,

- Sampling rate of ADC
- Resolution of ADC and DAC
- Buffer capacity of Tx and Rx
- No. of analog sources your captured and transmitted, how they can decode at Rx side

You can get more information/ideas about ECG monitor implementation from following location,

https://www.freescale.com/webapp/sps/site/application.jsp?code=APLPECGMON

Good Luck !

 

[akss_here]

adc max232

go with the simple steps analog design..

heart signals --> Instrumenation amplifier--> Right Leg Drive circuit --> Bandpass pass filter --> T notch filter --> osclioscope output

specification: filter frequencies and gain at each steps...

then you can next go for Digital circuit design for serial as mentioned

ADC --> max232 --> SPI --> DB9

here sampling rate and buad rate are important issues

next all rest things you can manage with your software enviornment ..i,e you have chosed for algorthim...

 

[doraemon]

ecg adc resolution

Hello!

Just curious: if you want to look at the ECG on a scope, why do you need a
microcontroller?
Instead of:
Analog Source -> ADC -> Tx -> Rx -> DAC -> Input to Scope

You may consider:
Analog Source -> Input to Scope

Now if the data MUST be converted in both ways, use an instrumentation
amplifier as suggested above with other amps for floating reference.
Then you need ONE single ADC, and I would say that a 500 Hz sampling
frequency would do what you want.

Dora.

Greetings , I'd love your suggestions and ideas for the following project:

An ECG Monitor wich output must be viewed on a regular Osciloscope , data must be captured , converted to digital (8 bit conversion) transmited via serial , received and converted back into analog form then viewed on a scope.

As of now we're thinking of using PIC16f877 ADC to obtain, convert and transmit the signal over to a 2nd PIC wich will receive then send the data over to a DAC0808 then onto the Scope.

Suggestions? tips? all welcome

 

[akss_here]

ecg analog out

Dear sir,

if you just see the step line it will be clear...

here the idea is to transmit and receive some collected signal...

So Tx and Rx is used and i have noone have much doubt about digital transmission..