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Type: Posts; User: cipi-cips

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  1. Replies
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    Closed: LORA module and PIC MCU communication

    Hello,

    If someone can help or guide me somehow to communication between PIC MCU and LORA E32-868T30s from ebyte. I will get this lora modules in few days and I am curious how do you communicate...
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    Closed: Re: Calculating LED chips

    Hello,

    From datasheet forward voltage is 2.89V that is total power is 2.89*0.7 = 2.023W if I divide that 252lm/2.023W I have 124.57 lm/W meaning that 252lm from data sheet is lumens per led chip...
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    Closed: Calculating LED chips

    Hello,

    I dont know is this is good place to post this question but it is part of my homework,

    I was suppose to calculate how many LED chips should I use and get total lumens for 20W LED lamp. I...
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    Closed: Re: Power supply calculation and voltage drop

    Can you explain me how it will be 10 Ohm ? Probably type error I see I have written 10k but it will be 100Ohm's per positive and 100 Ohms per negative wire.



    Is it possible to use multiple...
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    Closed: Power supply calculation and voltage drop

    Hello,

    If someone could guide me how to calcute next problem,

    I have a 50 loads that can be powerd from 6-12V and current consumption is 80mA connected in paralel with a distance between each...
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    [SOLVED]Closed: Re: Power supply measurment

    Thx for all your reply,

    Problem was in power supply it was damaged.

    Thanks
  7. Replies
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    924

    [SOLVED]Closed: Re: Power supply measurment

    THx for reply,

    This is the exact situation I am facing, while moving potentiometer from one end to another I start to see raise in the current from 0mA - 10mA and voltage is dropping from 12V to...
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    [SOLVED]Closed: Power supply measurment

    Hello,

    If someone can help me with testing power supply,

    I have one power supply that has output of 12V and the maximum current is 400mA but voltage drops to cca 6.3V. These are the information...
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    1,235

    Closed: Re: ammeter for microcontrollers

    Yes I can connect GND mcu to GND of LEDs.

    Is this ok or I failed everything

    128672
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    Closed: Re: ammeter for microcontrollers

    Thx for replay,

    here are more details.

    LEDs are driven via dimmable led driver. Driver has input DIM pins (+DIM and GND). To be able to DIM one pulse has to be repeated every 10sec - 120 sec....
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    Closed: Re: ammeter for microcontrollers

    THx for reply,

    I want to measure current because LEDs are dimmable.
  12. Replies
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    1,235

    Closed: ammeter for microcontrollers

    Hello,

    If someone can help with this problem. I have dc power supply that powers LED. Output is 48V when LEDs are turned on and current is 800mA. I want to measure the current so I can know if...
  13. Closed: Question about arduino in exterior lighting

    Hello,

    If anyone experienced with arduino can help with this few questions. I want to build LED lamp to put in my garden (I can buy something like this
    ...
  14. Closed: Re: Question about USB, windows 7 and PIC controller

    Thx for answer, I have found some programing code for USB both firmware and software. So does anyone know where in the code is written that direct communication with hardware (PIC micrcontroller)...
  15. Closed: Question about USB, windows 7 and PIC controller

    Hello

    I have heard that windows 7 is using virtual addressing for usb peripherals i.e. it doesnt communicate direct with connected hardware, how to solve that ? Is the HID subclass answare to my...
  16. Replies
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    Closed: Re: i2c and serial eeprom

    Well every paper that I have read says that A0, A1, and A2 are used for multiple slave devices. Since I have only 1 slave only 1 EEPROM than according to datasheet those pins must be tied to ground.
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    Closed: Re: i2c and serial eeprom

    Hello



    Yep this is a built in compiler function and it does correct acknowledge polling. Inside of that function is If state which test bus collision

    If (PIR2bits.BCLIF)
    {
    ...
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    2,636

    Closed: Re: i2c and serial eeprom

    Hi

    WP pin is tied to ground, do you probably now why does PIC cant leave this loop while(EEAckPolling(0xA));.
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    Closed: Re: i2c and serial eeprom

    Hi
    Ok I have studied and recorded more results,
    In the picture you can see that reading sequence is always reading 255 (11111111) all data bits are high no mater what I enter as data.
    ...
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    Closed: Re: i2c and serial eeprom

    Done I have put delay and this is what happens, no matter what data I put always get 0 at output

    - - - Updated - - -

    It is like my ReadI2C() function doesn't read anything
  21. Replies
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    Closed: Re: i2c and serial eeprom

    HI there

    I have put resistors both on SDK and SCL to the VCC, (I found on internet that 24C32 wont work without that).
    Second I put SDA and SCL both LOW at start (TRISBbits.TRISB0 = 0 and...
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    Closed: i2c and serial eeprom

    Hello

    Can someone help with my code, I am just trying to write something in the 24LC32 serial EEPROM with i2c protocol.
    I have studied datasheat both for memory and PIC controller. I am using...
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    Closed: serial eeprom C18 compiler

    Hello

    Does anyone have book, reference or some simple code with serial eeprom (24cxxxx) and C18 compiler ?

    I've found this on web from microchip but there are no example code.
    ...
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    Closed: Re: interrupt time calculation

    can you explain me how did you calculate that interrupt time ?

    and one more question if anyone knows, in proteus when you pick PIC, at properties you can set Processor clock frequency. If I use...
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    Closed: Re: interrupt time calculation

    these are my config

    #pragma config PLLDIV = 5 // 20 MHz external clock / PLL prescaler value of 5 = 4 MHz required input to PLL circuit
    #pragma config CPUDIV = OSC1_PLL2 // non-PLL postscale...
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