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  1. Replies
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    Re: Infrared HPWM setup

    I will try to change that as well before i go for the RC5.

    The following 15 days i will be in a business trip in Abu Dhabi so i will get back as soon as i have time to check this out.

    Many...
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    Re: Infrared HPWM setup

    Hi Richard,

    you are right, i have decreased the speed and manage to play a lit bit with the delay in useconds.

    I worked somehow but not always reliable.

    I think i will try the RC5 method.
  3. Replies
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    Re: Infrared HPWM setup

    Please find the schematic as follows.

    I hope i didnt forget anything. In any case is very simple.

    9445
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    Re: Infrared HPWM setup

    I will make the schematic on paper later today and will upload it here.

    thanks :)
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    Re: Infrared HPWM setup

    I will do that thanks a lot.

    Yesterday i tried till late at night to set a code for the TX and RX, a very simple one but didnt work.

    tx:



    ...
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    Re: Infrared HPWM setup

    with the following configuration i got this on the scope. So i guess we are in a good path.

    To mention that the main OSC is at 64Mhz using HPWM on the PIC18f26K22 on portc.2


    TRISC.2 = 0 ...
  7. Replies
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    Re: Infrared HPWM setup

    thanks Richard. now is clear.

    i will get back once i have a working code and establish an IR communication.
  8. Replies
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    Re: Infrared HPWM setup

    i've also noticed you've shifted 2 bits on the right the CCPR1L

    CCPR1L = 210>>2 ' Set PWM Duty-Cycle to 50%

    So the CCPR1L value will be 52.

    (11010010) 210>>2 = 00110100 = 52

    why have we...
  9. Replies
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    Re: Infrared HPWM setup

    Hi Richard,

    thanks for the clarification and answer.

    I found in the manual what you said regarding the Resolution bits.

    9440
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    Infrared HPWM setup

    Dear all,

    just a quick question. I didnt want to open a new thread but most of the Infrared threads are closed.

    I would like to set up the PIC18F26k22 in order to use HPWM for the 38khz IR.
    ...
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    Re: Heart rate sensor MAX30102

    sorry for my late response. I was really busy these days.

    thanks for the info. I will do some changes and tests. :)
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    Re: Heart rate sensor MAX30102

    I did an other test on a different person. Those info are from a woman.

    Richard have done a very good job up to now. I think the LPF should not be so aggressive.

    9176



    LPF RED IR...
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    Re: Heart rate sensor MAX30102

    Richard this is already lots of work, and i dont know how to thank you for all this.

    I believe that this will be useful for many people in the forum in the end. (even if noone else is involved).
  14. Replies
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    Re: Heart rate sensor MAX30102

    hehehehe, sure i will do that. Just to check what will be the values on a different person, as i know my average Heart pulses are always around 82-90 Bpm.

    I will find someone with much lower and...
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    Re: Heart rate sensor MAX30102

    Richard,

    i think i post #41 and #44, the graph was a bit better in terms of highs and lows. Dont know if the last configuration and modification in LPF made it easier to identify those highs and...
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    Re: Heart rate sensor MAX30102

    Richard thanks for your effort.

    These are the new results base on the last change on IR values.



    8744 8760 9019
    8745 8759 8995
    8743 8740 9001
    8744 8754 9012
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    Re: Heart rate sensor MAX30102

    Just transfered those values from the PICKIT serial terminal to excel. No conversion.

    9160
  18. Replies
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    Re: Heart rate sensor MAX30102

    just tried. Let me see the values on the excel. :)



    0 8028 1F5C
    8053 8551 8259
    8076 8533 8249
    8100 8563 8254
    8120 8541 8251
    8140 8553 8244
  19. Replies
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    Re: Heart rate sensor MAX30102

    wrong info above, as i captured ascii and not hex values.
    I'll try to fix that on the following message.
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    Re: Heart rate sensor MAX30102

    For everyone info,

    found this interesting article.

    https://morf.lv/implementing-pulse-oximeter-using-max30100
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    Re: Heart rate sensor MAX30102

    results from PICKIT UART TOOL at 9600.



    RED IR
    8875 9120
    8859 9127
    8867 9128
    8868 9127
    8871 9116
  22. Replies
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    Re: Heart rate sensor MAX30102

    I guess you have this one

    9153

    https://www.teachmemicro.com/max30102-an-improved-heart-rate-sensor-for-arduino/

    I also have 2 of those, but in the schematic the input voltage is 3.3V to 5V. ...
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    Re: Heart rate sensor MAX30102

    Richard which sensor did you have? Could you please let us know? for avoiding it in the future.

    Based on cardiovascular medical graph, the post #44 and post #49 looks fine.

    I think #49 it is a...
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    Re: Heart rate sensor MAX30102

    That's really impressed Richard.

    Im still working step by step on the code, im still at an early stage.

    Just need to understand the methodology.
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    Re: Heart rate sensor MAX30102

    Thanks Richard,

    just wanted to understand it. Now it is clear.
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