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  1. Replies
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    Re: MPPT solar battery charger

    No, you have no panel protection diode. there must be a diode right after the panel, before the point C. It is essential.
    If the sun goes down and you have no load at the moment, the input capacitor...
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    Re: MPPT solar battery charger

    Hi iw,
    I'll be glad to do this :) Had no such fun from long time.
    I need the nominal voltage and maximum current values of the panel or just the model.
    I noticed the lack of general decoupling...
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    Re: MPPT solar battery charger

    ok, i answered myself. I did simulation again.
    The voltage have little change indeed and can be used to determine the direction of duty. But this can be done without this too.
    Iw, if i find some...
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    Re: MPPT solar battery charger

    Thanks iw,
    I suppose the first chart explains your code. I found it in the net. But i'm still out of focus.
    Why is the measurement of dV? As is shown on the simulation, the voltage of the panel...
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    Re: MPPT solar battery charger

    Hi iw,
    I'm impressed of your work.
    I played once with mppt converters and i know how crazy is.
    the attachments show dc simulation of 21V@8A photovoltaic. May be will be useful for you. I have...
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    Re: DS1302 Problem, again :(

    My apologies, the base emitter junction do not like reversed voltages. It's better to connect diode in series to the resistor.
    You can left the speed up capacitor but in parallel of R-D. Be careful...
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    Re: DS1302 Problem, again :(

    7328

    Hi all,
    Because of my specially attitude to picbasic, i want to share little xp.
    I had to move from I2C to SPI RTC, i had lack of pins and this would save me one pin.
    So i needed hardware...
  8. Thread: LONGssss

    by theFob
    Replies
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    1,725

    Re: LONGssss

    sorry, the problem is in my code. Had retfie instead bra restore in the middle of the interrupt, which is low, need restore ...
    If any is interested in 2 interleaved 512B FIFOs capturing port value,...
  9. Thread: LONGssss

    by theFob
    Replies
    1
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    1,725

    LONGssss

    Hello,
    I decide to test 2.50 long variables with sd card application. I wrote my own functions for write and read sectors. I don't use FS, but i do sequenced .bin file with predefined size ( i am...
  10. Thread: Firmata

    by theFob
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    2,419

    Firmata

    Hi all,
    I intend to start work on firmata piccasic firmware. Was anyone worked on this?

    Firmata claims to be universal protocol to make ANY mcu as PC extension. But it seems to me that all...
  11. Thread: usb keypad

    by theFob
    Replies
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    11,777

    Re: usb keypad

    I have little fight with snp.exe ( XP Antispyware 2012) worm in may PC, but I am the winner.
    So this is the code for now. In my app I will remove the LCD and will add a lot of serial communication....
  12. Thread: usb keypad

    by theFob
    Replies
    10
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    11,777

    Re: usb keypad

    ANDDDDDDDDDDDD: The Grande Button Box (GBB)
    But I still have questions.
    1. Can I simple relocate code and interrupts with some ORG
    when I use serial bootloader?
    2. Is there some negotiation...
  13. Thread: usb keypad

    by theFob
    Replies
    10
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    11,777

    Re: usb keypad

    OK its done. The problem was in the serial bootloader.
    And for ICSP the reset cap C3 must be far below 100nF - 10nF or lower.
    I will post code soon as is ready. Then will make fun with the serial...
  14. Thread: usb keypad

    by theFob
    Replies
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    Views
    11,777

    Re: usb keypad

    Thanks Daemon
    The task I'm doing is litlle more complicated.
    I need to send serial commands to other devices (HDMI Switch, etc.) and Keyboard events simultaneously from
    this board. I also image a...
  15. Thread: usb keypad

    by theFob
    Replies
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    11,777

    Re: usb keypad

    Well, there is missing USBInit in the code.</SPAN>
    This is happen when my beer is over.
    Now Windows say: "There is unknown usb device"</SPAN>
    What must to be changed in the descriptor?</SPAN>
  16. Thread: usb keypad

    by theFob
    Replies
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    11,777

    Re: usb keypad

    There is some code. The keyboard is ok, but the usb out freezes the pic.</SPAN>
    Also windows don’t recognize the board as keyboard. I try to use </SPAN>
    #define use_usb_bus_sense_io </SPAN>
    from...
  17. Thread: usb keypad

    by theFob
    Replies
    10
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    11,777

    Re: usb keypad

    Thanks</SPAN>
    I started the thread, so I feel duty to finish. Down is the hardware ready to go.</SPAN>
    There is a little error in the circuit. The diode D1 is in wrong direction.</SPAN>
    6174
  18. Thread: usb keypad

    by theFob
    Replies
    10
    Views
    11,777

    usb keypad

    Hi,</SPAN>
    I am very new to your forum and I wish to greet all of you.</SPAN>
    I am hardware engineer and so I need a little help, when I am stick with software.</SPAN>
    I have to made strange...
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