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Type: Posts; User: baileychic

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  1. Replies
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    Closed: How to design the amplifier circuit?

    How to design the amplifier circuit?

    I have to use INA126 and design an amplifier and for the final output I will use a UG buffer amplifier.

    Client's data are these:

    I have to apply 5 na...
  2. Replies
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    Closed: Re: High Frequency using 8051

    In scope, channels should be set to DC measurement. In your setup, all channels are set to measure AC.
  3. Closed: Re: SMPS selection for Big 6-Digit 7-SEGMENTS display as driver

    It is multiplexed and so only one digit will be ON at a time and so the current draw at any instance is max 440mA.

    You should not run LEDs at max ratings. If LED current is max 60mA then it is...
  4. Closed: Re: Invasive blood pressure monitoring. How to?

    Just an update for the thread. Adding a simulation screenshot showing the signals on the graph.



    I tried again but when I save .png file as .jpg file the file size inclreased from 834 KB to 3.x...
  5. Closed: Re: Invasive blood pressure monitoring. How to?

    Okay, thank you. Will do it.

    Just an update for the thread. Adding a simulation screenshot showing the signals on the graph.

    Edit:

    Also tried that (Inserting Image) but after uploading the <...
  6. Closed: Re: Invasive blood pressure monitoring. How to?

    Just an update for the thread. Adding a simulation screenshot showing the signals on the graph.

    Edit:

    I need to post an image and forum is not showing the image after it is uploaded in file...
  7. Closed: Re: Invasive blood pressure monitoring. How to?

    It was a lot of work to get the SBP, DBP and MAP readings on LCD and also the MAP signal on DAC. Finally the project is finished.
    The subject was actually a rat.

    After the student provided the...
  8. Closed: Re: Invasive blood pressure monitoring. How to?

    Got correct SBP, DBP, and MAP. I messed up the variables inside ADC ISR but got it working. MAP signal in simulation is also okay. I used 1 Hz half sine wave (+ve) to test in Proteus.

    Have to get...
  9. Closed: Re: Invasive blood pressure monitoring. How to?

    I changed the code and used ADC interrupt to read sensor data continuously to get SBP and DBP but they are not working as required. How to get the correct SBP and DBP readings?

    MAP = (1/3)SBP +...
  10. Closed: Re: Invasive blood pressure monitoring. How to?

    Then what is the easiest method to get SBP, DBP, and MAP?

    How can wave cut before reaching the minimum? What reasons for it?

    Edit:

    Should I take say 500 to 1000 samples in 1 second and then...
  11. Closed: Re: Using 0-10V analog sensor output with rasbery pi

    Upper resistor 27k
    Lower resistor 3.3k

    ADC connected across 3.3k.
  12. Closed: Re: Invasive blood pressure monitoring. How to?

    If this is the Pressure wave then how to read and find out SBP and DBP?


    153659

    http://pixhost.to/show/140/110830428_cnap-co-pulsewave-analysis.png
  13. Closed: Re: How to find a copy of "An Embedded Software Primer" book?

    I have 2005 (Twelfth edition) soft copy.
  14. Closed: Re: Invasive blood pressure monitoring. How to?

    @FvM

    Okay, So, now how should I interface the BP AMP output which gives 0 to 2.5V = 0 to 250 mmHg pressure to PIC16F or ATmega2560 ADC input?
    Do I need any other additional circuit? If yes, what?...
  15. Closed: Re: STM32F103 Uploading error on Arduino IDE

    Have you tried these methods?

    https://idyl.io/arduino/how-to/program-stm32-blue-pill-stm32f103c8t6/

    https://www.youtube.com/watch?reload=9&v=KgR3uM21y7o
    ...
  16. Closed: Invasive blood pressure monitoring. How to?

    Invasive blood pressure monitoring. How to?

    My previous BPM related thread here

    https://www.edaboard.com/showthread.php?383839-How-to-interface-BP-Transducer-to-PIC18F

    got all messed up with...
  17. Replies
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    Closed: Re: How to interface BP Transducer to PIC18F?

    I ported Microchip AN1556 code to mikroC. This is a piece of my core An1556 code and I am getting errors related to Heap Memory in Proteus.

    How to fix the errors related to memory?

    Lines 198,...
  18. Closed: Re: Using 0-10V analog sensor output with rasbery pi

    10V/4095 = 0.00244V
    3.3V/4095 = 805.86uV

    If Pi is used for ADC reading then you need to scale the 10V to 3.3V.

    10V - 3.3V = 6.7V

    6.8k and 3.3k will do.

    What resolution you want from...
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    Closed: Re: PIC 16f877A interrupt

    #include <xc.h>
    #include "LCD.h"
    #include <math.h>
    #define _XTAL_FREQ 20000000
    // CONFIG
    // CONFIG1H

    #pragma config FOSC = HS // Oscillator Selection bits (HS oscillator)
    #pragma...
  20. Replies
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    964

    Closed: Re: PIC 16f877A interrupt

    Explain these so that I can understand the code fully and then debug the code.

    What is Ip, PSM, TMS, top, tactual?



    Amps = 0.007;
    float Ip = 0.005 * 1 ;

    if(Amps>Ip)
  21. Replies
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    964

    Closed: Re: PIC 16f877A interrupt

    It is better to use Timer1 interrupt for the delay generation as it gives accurate delays.
    What is your required delay range based on your Amps range?
  22. Replies
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    964

    Closed: Re: PIC 16f877A interrupt

    Yes, zip and post your complete project so that we can tell you what is wrong with it if any and how to fix it.
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    [51]Closed: Re: problem with submersible water pump

    Stronger battery which could supply current for both PIC and pump. Maybe Pump is drawing more current while turning On and 5V supply is dropping during Pump turn On and PIC is resetting.

    Show the...
  24. Closed: Re: hardware issues in simple interrupt code p16f887 using mikroc

    If you need WDT to be enabled then enable it else just disable it in project settings.
  25. Closed: Re: hardware issues in simple interrupt code p16f887 using mikroc

    INTEDG_bit was also missing in the code. I added it.


    void interrupt() {
    if((INTF_bit)&&(INTE_bit)) {
    PORTD = ~PORTD;
    INTF_bit=0;
    }
    }
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