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Type: Posts; User: paulfjujo

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  1. Replies
    13
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    821

    Closed: Re: 100 kHz interleaved signal generation?

    hello,



    :thinker: not more explanation than in post #10 ...

    did you click on the link ?

    even explanation are in french, C code or ASM code is universal ..
  2. Replies
    4
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    203

    Closed: Re: Internal Oscillator Sources

    hello,

    on a 16F1847 , i have this

    6.0 REFERENCE CLOCK MODULE
    The reference clock module is controlled by the
    CLKRCON register (Register 6-1) and is enabled when
    setting the CLKREN bit. To...
  3. Replies
    13
    Views
    821

    Closed: Re: 100 kHz interleaved signal generation?

    hello,

    i confirm .. with asm or asm in C langage !
    but not with an Arduino...nor PWM

    1Mhz output with Fosc=16Mhz
    so easier to output 100Khz

    you also can use internal FOSC, and do a litle...
  4. Closed: Re: Selection of ICs, Transistors, Power Supply for Big 7-Seg (say 6 inch) for MCU

    hello

    hello,


    ULN2803 + UDN2981 is a good pair of devices to drive 7 segm display.
    example

    if you have a Big display with 6 leds in serial to build one segment (Red color !)
    you will...
  5. [PIC]Closed: Re: Unable to program PIC18F4550 through Pickit3

    hello,

    it is not so clear on the photo
    is j1 jumper on slot A of ZIF support..
  6. Replies
    17
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    2,001

    Closed: Re: NTC thermistor interface to MCU

    hello,

    RTD are used in industrial environment
    and follow Datasheet rules
    differents classes of RTD A,B,C .. differents prices and accuracy
    read theses doccuments to be inform about it..
    ...
  7. Closed: Re: water level sensor circuit for wireless monitoring

    hello,

    suggestions :

    cold point of 12V transformer must be connected to ground
    Resistor between E C transistor to confirm the level 1
    MCU links ! pull up + 0V
    capacitor in AC polyester...
  8. Replies
    19
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    1,491

    Closed: Re: AD9834 DDS Function Generator

    with AD9835 Sparkfun Breakboard and 18F2550
  9. Closed: Re: [moved] 32bit input capture using PIC16f

    hello,

    the frequency of data bit on IR remote control is slow enough , to direct store result inside a long word (32 bit)
    or in a table of 32 element ( even using a byte to store one bit )
  10. Replies
    11
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    822

    Closed: Re: Reading a csv file in C

    hello,


    i don't know on what systeme you will use a C Program

    but wit a PIC MCU
    i use this , to get RGB values, in a CSV file ( with coma separateur)
    the main function used is strtok ...
  11. Replies
    9
    Views
    1,180

    Closed: Re: How to burn hex file into AT89C51 ?

    hello,


    i was facing with same problem ...
    i built myself a AT89C2051 programmateur using a PIC 16F874
    it uses Terminal Vbray to send the Hex file into the programmator .. then the PIC decode...
  12. [SOLVED]Closed: Re: 8052-at89s52 ,HC SR-04 ULTRASONIC SENSOR ,1 cm error in every 30 cm

    commuation time is a value in nanosecondes !
    you have air speed velocity of U.S.
    5.88 µS/mm
    so , not a problem with any nS even with 1µS .!
    if you have not inserted RC filter .
  13. [SOLVED]Closed: Re: 8052-at89s52 ,HC SR-04 ULTRASONIC SENSOR ,1 cm error in every 30 cm

    hello,

    HS SR-04 response follow Y=Ax +b
    x is time
    b= offset to adjust by software (minimum range of measure)
    and A coefficient (Air velocity) to corrected by delta Air Temperature
    ...
  14. Closed: Re: What is the purpose of reed switches in the pressure switch ?

    hello,


    Are you sure that purpose is to control pressure ..
    i think it is to control Low and High level of water
    inside a Tube passing in the central Hole of the PCB
    A magnet will act on reed...
  15. [PIC]Closed: Re: Interface LCD between pic microcontroller and mikroC

    hello,



    for me


    char main_1[] = "MAIN MENU"; // string character
    char prog_1[] = "1 program";
    char prog_2[] = "2 program";
  16. Closed: Re: Hc-sr04 with at89s52 ,maximum time for echo pin that remains high ?

    hello

    with 38ms , at 340M/sec => 13Meter /2 = 6,5M (/2 because Forward way, then Backward way (echo)

    with my HC04 i can reach measure from 3cm up to maxi 4,00M

    so i think 38mS is OK ...
  17. Replies
    1
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    1,312

    Closed: Re: OLED DISPLAY color change

    hello,

    i think this Oled display can only use Yellow color for 1rst line and other lines in blue color ...
    i tested one with a PIC ...
  18. Closed: Re: Measure DC current of a motor using an Arduino nano

    Hello,



    Datasheet of your sensor ?

    if it is an ACS712 , offset is arround VCC/2
    and with a scale of 30Amps, no chance to measure 12.92 mAmps !

    Event with a scale of 5Amps..
  19. [PIC]Closed: Re: Water flow sensor configuration in counter mode failing

    hello,

    datasheet on this flow sensor ?
    schematic ?
  20. [51]Closed: Re: Software UART on AT89C51 Using Embedded C

    sometime, need own job to do by yourself ...
    strict instruction : study datasheet fisrt.
  21. [51]Closed: Re: Software UART on AT89C51 Using Embedded C

    hello,

    you can test with MikroC for 8051 ... available if code size <=2Kb



    #define Version "180702"
    #define Directory " "
    #define Project " "
    #define Source " "
  22. Closed: Re: Using Raspberry Pi to read signal generated by a function generator

    Hello,


    You can't get 1Khz values, if you want to printout each of them...
    Store the getting values into RAM, during maybe 1 second, then get back from ram buffer to print them..

    Or do your...
  23. Closed: Re: Unable to communicate SIM808 Module using PL2303 usb to serial converter

    hello,


    check inside USB converter, quality of soldering .. poor quality on devices made in RPC ..
    i loose many hours about this problem ( see picture) before to discover the failure.
    ...
  24. Closed: Re: Trying to pass and return a variable to a function returns uneffected value

    hello


    unsigned int Filter(unsigned int sample);

    to get a returned value ...
  25. Replies
    3
    Views
    751

    [ARM]Closed: Re: TFT LCD ILI9341 8bit data mode problem

    hello,


    show details on LCD Init et Pixel draw
    TFT_Init_ILI9341_8bit(240, 320); // are you sure of this order , because if mode is wrong you need (320,240)
    TFT_Dot(240, 255,...
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