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Type: Posts; User: speedEC

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  1. Closed: Re: Collision between USART data and Port Pin operation

    PIC16F... not connected directly to scanner. Connected thru' PIC24FJ... only. Scanner data sent to PIC16F only from PIC24FJ... PIC24FJ takes care of communicatiing with scanner and retrieve data....
  2. Closed: Re: Problem in receiving data to PIC MCU from Barcode Scanner thru' MAX3421E

    I have contacted the MAXIM for this issue. They told me that they did not check the module for Barcode Scanner. So, asked me to analyze the flow in PIC24FJ.. (used to communicate with scanner thru'...
  3. Closed: Collision between USART data and Port Pin operation

    Hello All,
    I am facing a problem in accessing Barcode Scanner data. I am using PIC24FJ... uC for communicating with USB Barcode Scanner. Everything works fine as expected but with one issue. I am...
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    [SOLVED]Closed: Re: MAX7219 and Common Anode LED Display

    I have implemented the circuit referred by Easyrider83. It works fine now. Thank you andre_teprom, Brian and Easyrider83. Circuit attached.

    Thank you.
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    [SOLVED]Closed: Re: MAX7219 and Common Anode LED Display

    If MAX sinks the DIG pin, the current should flow and vice-versa. If we add npn transistor, the signal could be inverted. How can we solve this issue? Any suggestion?

    Yes. I have tested the code...
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    [SOLVED]Closed: Re: MAX7219 and Common Anode LED Display

    static void Send16bits (unsigned short output)
    {

    unsigned char i;

    for (i=16; i>0; i--)
    {
    unsigned short mask = 1 << (i - 1); // calculate bitmask

    SERCLK = LOW;
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    [SOLVED]Closed: MAX7219 and Common Anode LED Display

    Dear friends,

    MCU : PIC16F1938
    LED DISPLAY (BIG SIZED): 6 DIGITS
    VDD (LED DISPLAY) = +12V
    LED DIGIT SIZE: 3.5" x 5"
    DISPLAY: COMMON ANODE ***
    POWER SUPPLY:
    MAX7219 & PIC MCU = +5V
    LED...
  8. [SOLVED]Closed: Re: Code works in eeprom at24c04 that not works in at24c32n

    Thank you. problem solved. I am using TinyRTC Module which consists of both DS1307 (RTC) and AT24C32N. So do we need to use 8 bit addressing for DS1307 (RTC) and 16 bit addressing for AT24C32N?
    ...
  9. [SOLVED]Closed: Code works in eeprom at24c04 that not works in at24c32n

    TinyRTC Module. DS1307 works OK with the same code.

    CODE WORKS IN EEPROM AT24C04 THAT NOT WORKS IN AT24C32N. I have changed the Address of the EEPROM only. (A4 for 24C04 - 1010010 & R/W). (A0 for...
  10. Closed: Re: Unable to communicate SIM808 Module using PL2303 usb to serial converter

    You have to resolve this harware issue first to see the result SIM module on terminal. Test the harware connection and see tha Voltages of PL2303, MCU.


    IN SIM300 DATASHEET:
    The AT command set...
  11. Closed: Re: Problem in receiving data to PIC MCU from Barcode Scanner thru' MAX3421E

    Even in un-suspended mode, RWUIRQ not set when Barcode scanner sends data.
  12. Closed: Problem in receiving data to PIC MCU from Barcode Scanner thru' MAX3421E

    Dear all,
    I am interfacing Barcode Scanner (USB) with PIC MCU thru' MAX3421E. I can able to connect and Enumerate the Scanner. But after that, I could not able to receive the barcode value from...
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    [SOLVED]Closed: Re: USB TO TTL CONVERTER interface problem

    for some reasons, whether it is by virus or some other problem, I could not able to see the Device Manager. It always shows empty. But, the USB views also do the same.

    thank you,
    speedEC

    - - -...
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    [SOLVED]Closed: USB TO TTL CONVERTER interface problem

    Dear friends,

    OS: Windows 7 (32 bit)

    Recently I bought USB TO TTL CONVERTER from eBay.in. Silabs CP2102 IC used in the converter. I have downloaded the VCP (Virtual Com Port) driver and also...
  15. Closed: C OR C++ OR VC++ OR VB.NET and MS Access Programmers required for my small project

    Dear all,
    I need C OR C++ OR VC++ OR VB.NET and MS Access and Embedded C Programmers required for my small project. If anyone interested, pl send reply.

    1. Operating System: WINDOWS 7

    2....
  16. [PIC]Closed: Re: GSM interfacing with PIC32mx440f256h microcontroller

    post schematic first?

    pmk
  17. [SOLVED]Closed: Re: Getting wrong distance values from Ultrasonic Sensor frequently

    In addition to the above modifications in the code, I have added timer0 module for precise operations. In my earlier code,
    person detection period works correctly (100%) as I desired, for example,...
  18. [SOLVED]Closed: Re: Getting wrong distance values from Ultrasonic Sensor frequently

    A small change as below should be made in the code for working correctly in Hi-TECH - C compiler [ in order to differentiate between binary and octal].

    Wrong code:


    TRISA = 00000000;
    TRISB =...
  19. Closed: Re: Selection of GSM module and Controller with 2 serial port - reg

    more details required to help.

    pmk
  20. Closed: Re: Suggestions welcome for Antenna for tranceiving 433 MHZ over 1000 meters

    Dear friends,

    I have tested with Various Antenna and stored results in xl sheet. it is attached FYRef.
    The RF settings are:
    CFREQ = 433 MHz, DEVIATION = +/- 20 kHz, Data Rate = 1.171875 kbps...
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    Closed: Re: Why neoway m590 GSM GPRS NOT send Message ?

    Sending AT command from uC or System? Have you checked the module with AT commands through Hyper Terminal? If uC, post code snippet.

    pmk
  22. Closed: Re: Short C code for PIC16F627A builds but won't run properly

    Proper Sequence of Settings (recommended):

    1. #include header files
    2. __Config
    3. _XTAL_FREQ
    4. variable declarations
    main(){
    5. INTCON = 0;
    6. TRIS
    7. PORT
  23. [SOLVED]Closed: Re: Getting wrong distance values from Ultrasonic Sensor frequently

    Now my code works correctly. I have modified the code as "read 3 times and Average" method. Also, I have increased the interval between object detection and object moved out. Say, detect object is <...
  24. [SOLVED]Closed: Getting wrong distance values from Ultrasonic Sensor frequently

    Dear friends,

    I am using PIC16F1938 & ULTRASONIC SENSOR. I have coded in C (MPLAB v8.63). If I put a object in front of ultrasonic sensor [preset (>2 CM and < 100 CM) range], it shows correct...
  25. Closed: Re: Suggestions welcome for Antenna for tranceiving 433 MHZ over 1000 meters

    Yes

    case 1: 10 foot
    case 2: 3 foot

    RSSI = 0x54 approx when Both TX and RX placed between 1 foot. reading RSSI when RX receives signal from TX.

    Note: RSSI Chart from datasheet attached. As...
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