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  1. Replies
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    927

    Re: Stepper motor question:

    250v applied to +/- 1 Ohm ( NEMA 42 data ) create how much current ??? :rolleyes:

    You were joking, I suppose ...

    Alain
  2. Replies
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    927

    Re: Stepper motor question:

    YES ...

    SURE ...

    Alain
  3. Replies
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    1,073

    Re: Psst, Can You Keep a Secret?!?

    Hi, Ioannis

    Even after a thoroughful cleaning, the problem comes again ...

    Working fine here requires The 5.30 Version ...

    Probably a new Win10 " feature " :rolleyes:

    Have a nice day
  4. Replies
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    1,073

    Re: Psst, Can You Keep a Secret?!?

    Hi, Mpgmike,

    just a question about MPLABX 5.35 : Here ( win 10 up to date ) when I close it ... it automatically re-opens !!!

    so, I had to turn back to V 5.30 ... to get something usable.
    ...
  5. Replies
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    1,315

    Re: RPM Sensing

    Have a look here : http://support.melabs.com/forum/picbasic-pro-compiler-3-0-and-later/microcode-studio-ide/8240-trouble-writing-code#post8248

    some similarities encountered ...

    Alain
  6. Re: Crystal oscillator variability between PICs?

    Hi, Ioannis

    I didn't receive any notification nor for posts 8 to 11 ... just for the last one ( Yours )

    Best Regards
    Alain
  7. Re: Crystal oscillator variability between PICs?

    If you need high precision timing ... just do use external oscillators like those : https://www.mouser.fr/datasheet/2/96/CTS_11052019_008-0258-0_I_MXO45_MXO45HS-1665263.pdf

    just my two cents ......
  8. Replies
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    1,395

    Re: 12F675 vs 12F1840

    Hi, Ioannis,

    I'd have a look to internal registers PBP default settings ( the PBP default Config file ) ... as you overwrite most of them ...

    just an idea ...

    Alain
  9. Replies
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    1,005

    Re: If ... THEN @ NOP

    Hi, Pedja

    doesn't work Either ... ;)
  10. Replies
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    1,005

    If ... THEN @ NOP

    Could someone explain ...



    IF ACLine == 0 THEN
    @ NOP ' read Line input
    ENDIF


    THIS works ...
  11. Re: PIC18F1220 - Variables initialisation placement makes a change

    Hi, Flotul

    From the very far I remember ...

    ALL Variables have to be initialized before using them ....

    Only one exception : IF you write variables the first time you use them ...

    Say :
  12. Replies
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    9,867

    Re: 12f629 freq divider?

    Hello François

    Have an eye Here: http://www.leapsecond.com/pic/picdiv.htm

    Alain
  13. Re: Anyone worked with reading a sine/cosine encoder?

    Hi,

    have a look here : http://www.robsonco.com/Dinsmore/Compass2-bas%20program.pdf

    site to visit : http://www.robsonco.com/Dinsmore/Untitled_5.html

    Alain
  14. Replies
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    Re: breadboarding

    decoupling capacitors are missing !!!

    the " magic " one : 0.1/0.22 µF as close as possible to the supply pins of the Pic , and a " reservoir " one say 100/220 µF in the vicinity ...
    add to that...
  15. Re: Current sensor output modification. PIC or opamp or something else?

    Hi, Pedja ...

    you just redraw the TL431 !!!

    http://www.bristolwatch.com/ccs/img2/TL431p.jpg

    just have a look to its " OFF " state current ... : Off-State Cathode Current IK(off) VKA = 40V,...
  16. Re: Current sensor output modification. PIC or opamp or something else?

    Hi, Peter

    I wrote = the number the ADC returns ...

    Whatever processor you use ( of course, a PIC is much better :rolleyes: )

    Have a nice day
    Alain
  17. Re: Current sensor output modification. PIC or opamp or something else?

    Hi, peter

    why not use a TL431 or similar " zener effect diode " that will draw some current past 2.5v ...
  18. Re: How is this data being formed from the values given?

    Hi, Peter

    I suggest you to try :

    count = ( 1001 x Voltage - 9891 ) / 8 ;)

    Alain
  19. Re: Converting PULSIN reading to RPM, from PC Fan?

    You're Welcome Ioannis ...

    AND we are old friends !!! ;)

    8959

    Alain
  20. Re: Converting PULSIN reading to RPM, from PC Fan?

    Hi, Ioannis

    No, no ... it's not an error : if you divide the pulse train per 2 ( D Flip-flop ...) ... the High or low pulse you get @ output has the exact rotation period ... ( remember how you...
  21. Re: Converting PULSIN reading to RPM, from PC Fan?

    1) https://noctua.at/pub/media/wysiwyg/Noctua_PWM_specifications_white_paper.pdf

    2) @ these very low frequencies, the use of a divider per 2 ( so ... to measure the rotation period ! ) and using...
  22. Re: Converting PULSIN reading to RPM, from PC Fan?

    Hmmm ...

    Here I do recognise THE Curious one ...

    Are you really sure you open your manual on page 129 ??? ... I think ( and I am sure !!! ) you open it on page 131 ...

    BTW ... open your...
  23. Re: Converting PULSIN reading to RPM, from PC Fan?

    Hmmm ...

    I do not think at all PULSIN is the command to use ...

    just open your Holy manual :rolleyes: on page 129 ...

    May be you should consider closer the waveforms to choose the good...
  24. Re: ADC keyboard and fast response to user input, possible?

    Some readings about the very powerful ... BUTTON command could be helpful, then ...

    but, of course, you can rewrite it by your own ...

    :wink:

    Alain
  25. Re: ADC keyboard and fast response to user input, possible?

    Hi,

    What's YOUR time lag for " immediate " ...

    as always, this is a highly subjective point of view ...

    Generally ... " immediate " means ... Interrupt !

    Knowing your general way of...
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