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Type: Posts; User: kalyaniupen

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  1. Closed: Re: Interfacing one4x4 keypad with two 8051 microcontrollers at a time

    This is for redundancy only
  2. Closed: Interfacing one4x4 keypad with two 8051 microcontrollers at a time

    My project is Interfacing one 4x4 keypad with two 89 c55wd ics. That means the keypad connected to one 89c55wd should display the same data on both LCDs. C code is same for two controllers.Please...
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    Closed: Re: snmp and ethernet using 8051

    how to write mib tree easily for frequency, attenuation parameters of a upconverter module
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    Closed: snmp and ethernet using 8051

    My project is to use SNMP PROTOCOL and ETHERNET communication using 8051 or any other uc .my doubt is if this snmp and Ethernet communication can be done using AT89c55wd ic.If no then which...
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    Closed: help me out with DSN-2520A-219+

    I am using DSN-2520A-219+ to generate 2520MHz single frequency.Reference input is 20MHz(+5.9dBm).In Minicircuits datasheet register map is given for 2520MHz but there is no output.Please any body...
  6. [SOLVED]Closed: Re: max485 interfacing as transmitter and reciever

    can you help me with another code and schematic using max485 which level converters ttl-max485 and max485-ttl

    - - - Updated - - -

    if any variation in inputs of dip switches will be there any...
  7. [SOLVED]Closed: Re: max485 interfacing as transmitter and reciever

    Thanks for your response.What you said is correct and i am not able to understand "There is no need to wire VCC from left side to right side.But it is wrong also".What does this mean? Whether i have...
  8. [SOLVED]Closed: Re: max485 interfacing as transmitter and reciever

    Sorry for disturbing you.If i ONswitch in transmitter------A and B voltages must be +5v and 0v at the output of transmitter.
    These A and B of transmitter are fed to A...
  9. [SOLVED]Closed: Re: max485 interfacing as transmitter and reciever

    these are my connections
  10. [SOLVED]Closed: Re: max485 interfacing as transmitter and reciever

    thanks for your suggestions.My project is involved with 2 max485 ics and 2 8051 ics and dipswitches at transmitter side.MY aim is when I ON a switch connected at P1 of transmitter side,the reciever...
  11. [SOLVED]Closed: Re: max485 interfacing as transmitter and reciever

    my doubt is only one max485ic is sufficient for transmitter and reciever
  12. [SOLVED]Closed: max485 interfacing as transmitter and reciever

    I am new to MAX485 interfacing.My project is TTL-max485 level at transmiter side and max485-TTL at reciver side.please let me know how the connections are made to achieve level conversion and what...
  13. Closed: fractional N pll frequency synthesizer

    i am using adf4153 in that for single frequency 1800MHz my code is locking.whereas if i change the frequency to 1810MHz i have program R0 register and restore the new values to it.here how i have to...
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    [51]Closed: Re: special functions in keypad

    i am defining a array a[n]=123456;the same is displayed on lcd also. the problem here is if i give n=0; a[n]++;the position of the a[0] is incrementing and displaying but now i want to move to next...
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    [51]Closed: Re: special functions in keypad

    please give me code for these functions
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    [51]Closed: Re: special functions in keypad

    i am creating a display on lcd like 1234567890.ok.i want my cursor to move /shift left and give the data of the present cursor value.if here i press up arrow the 0 should increment from (0-9) for...
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    [51]Closed: Re: special functions in keypad

    then what to do suggest me the corrections
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    [51]Closed: Re: special functions in keypad

    here is my program pls go through of it and suggest me
    #include<reg51.h>
    #define lcdport P2
    sbit rs=P3^7;
    sbit en=P3^5;
    sbit r1=P1^0;
    sbit r2=P1^1;
    sbit r3=P1^2;
    sbit r4=P1^3;
    sbit c1=P1^4;
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    [51]Closed: Re: special functions in keypad

    i am writing a 4x4 keypad program.in that i am getting output of 0-9 numbers but for the remaining keys i had assigned as 'E' key- has to perform up arrow/up count operation
    ...
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    [51]Closed: special functions in keypad

    how to add special functions like delete,enter,uparrow, down arrow pls help me
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    [51]Closed: back space command in 4x4keypad

    sir,
    i want to know the code in embedded c for backspace,up arrow,down arrow in 4x4 keypad pls help me
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