Basic Question

Discussion in 'General Electronics Chat' started by kavin6, Jan 7, 2009.

  1. kavin6

    Thread Starter Member

    Jan 2, 2009
  2. thingmaker3

    Retired Moderator

    May 16, 2005
    The link does not work, so we cannot comment on the circuits therein.
  3. kavin6

    Thread Starter Member

    Jan 2, 2009
    The link works fine, anyways here is the schematics
    I want to transmit ECG signals via this module is it possible?
  4. Alberto

    Active Member

    Nov 7, 2008
    the chip shown in your post is a microcontroller. Form pin 14 and pin 15 the chip send out and receive serial data. This serial data will be sent to a RF module for RF tranmission to another module not very far from it.

    This RF module (See the site again) seems to be very cheap are foundamentally serial TTL input to RF output. With this modules you can use any microcontroller you want.

    You can also google for Xbee module which are very efficient.

  5. kavin6

    Thread Starter Member

    Jan 2, 2009
    Ok fine

    This is what I'm basically planning.

    First circuit link->
    Second circuit link->

    1.The first circuit is designed to determine ECG, IN+ & IN- are connected to electrodes.
    2.The vout of the first circuit will be connected to IN of the second circuit.
    3.Using RLP & TLP 315 I transmit & receive the signal.
    4.The output of the receiver will be connected to the audio line in (mic) of the PC, and I have a VB application to display the audio input which should be the required ECG!

    In this case is there any Xbee option for receiver and transmitter?

    Thanks for the help so far
  6. Audioguru

    New Member

    Dec 20, 2007
    Of course it will not work.
    The output of the ECG circuit is an analog signal and the input to the transmitter is computer serial data.

    It might work if you feed the analog signal to the ADC of a micro-controller and have a program to analyse it and digitize it. Then the receiver could feed its data to a DAC that feeds the signal to the pc.

    I don't think a mic input has a frequency response that goes low enough to receive heart beats.