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gregtorres

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Posts posted by gregtorres


  1. Hi Greg,
    I am glad that your project works well. ;D
    It uses unregulated 9V supplies which will be fine for a Cmos counter circuit. A TTL counter circuit would need a 5V low dropout regulator and a few other parts.

    The AC signal from the output of U4 could feed through a 10k resistor into 1/6th of a Cmos Schmiitt-trigger inverter to convert the AC into clean pulses then a second inverter could be used for you to select the best pulse polarity for the counter.

    We have a 99 seconds timer project that has a Cmos counter:
    http://www.electronics-lab.com/projects/oscillators_timers/014/index.html .
    Its clock can be the heartbeats and you would need to make your own timebase gating for it.

    There is a heartbeat display project on the web that used a microcontroller for its counter:
    http://www.web-ee.com/Schematics/HeMon/HeMon.htm .


    Thank you so much Sir! those things could really come in handy! but i dont really need a timer circuit, i just need a heart beat counter display. http://www.web-ee.com/Schematics/HeMon/HeMon.htm  :) i'll post a reply as soon as i have improvements.
  2. I'm finished working the ELECTRONIC STEThoSCOPE 2 project and its working just fine. now all i need to do now is to put or connect a 7 Segment LED  heart beat Counter circuit display to count in heart beats. but can i put or connect a 7 Segment LED Counter circuit to the ELECTRONIC STEThoSCOPE 2 even without changing the original circuit config. of the ELECTRONIC STEThoSCOPE 2? and is there a 7 Segment LED heart beat Counter circuit display project posted in the forums?

    Please help!

    any replies regarding to this topic will be highly appriciated! Thank you!

  3. I'm finished working the ELECTRONIC STEThoSCOPE 2 project and its working just fine. now all i need to do now is to put or connect a 7 Segment LED  heart beat Counter circuit display to count in heart beats. but can i put or connect a 7 Segment LED Counter circuit to the ELECTRONIC STEThoSCOPE 2 even without changing the original circuit config. of the ELECTRONIC STEThoSCOPE 2? and is there a 7 Segment LED heart beat Counter circuit display project posted in the forums?

    Please help!

    any replies regarding to this topic will be highly appriciated! Thank you!

  4. I'm finished working the ELECTRONIC STEThoSCOPE 2 project and its working just fine. now all i need to do now is to put or connect a 7 Segment LED  heart beat Counter circuit display to count in heart beats. but can i put or connect a 7 Segment LED Counter circuit to the ELECTRONIC STEThoSCOPE 2 even without changing the original circuit config. of the ELECTRONIC STEThoSCOPE 2? and is there a 7 Segment LED heart beat Counter circuit display project posted in the forums?

    Please help!

    any replies regarding to this topic will be highly appriciated! Thank you!

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