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Recent content by meera83

  1. M

    convert voltage or current signal to power supply voltage..

    i hv voltage signal 0-10V or current 4-20mA as input.. i need to convert this signal to an Output voltage to control my device.. the input source to control my device should b voltage supply with at least 3A. so what circuit can i use to get the voltage?? thanks
  2. M

    how to connect 4 PIC with 1 LCD?

    i m using PIC16F877.. i would like to use 25 analog device as input signal, so i choose to use four PIC to control it(one PIC can control 8 analog input).. the four PIC will send a command to LCD when either one of the analog device give input value.. the problem is how should i do in order to...
  3. M

    where to get PCB software?

    traxmaker i m using TraxMaker trial edition now.. may i know where can i get to buy the software in Malaysia? the TraxMaker software is inside combine with CircuitMaker2000,is it possible i still can get the 2000 edition? or do anybody know there is still got lastest edition for TraxMaker? i...
  4. M

    how to get more memory location?

    i m using PIC16F877. i had been ask to use potentiometer as analog input(0-5V) for PIC and display a range value(00.00-10.00) on LCD.. may i know that is it for one analog signal input to PIC, there are only 256 location to store the convert result? since every port consist of 8 bits(mean...
  5. M

    Problem with LCD that is controlled by PIC16F877

    problem with LCD thanks to all of your reply.. i will try to trobleshoot it with the advise that you guy suggest.. thanks..
  6. M

    Problem with LCD that is controlled by PIC16F877

    Re: problem with LCD what you mean by 'get initialized'?? for the potentiometer, i had adjust from the maximum to minimum, but the LCD still show nothing.. before that, i had try to test the LCD by stand-alone circuit(with no microcontroller) which connect the LCD pin to resistor and +5V..the...
  7. M

    Problem with LCD that is controlled by PIC16F877

    i m using PIC16F877 to run LED and LCD Display, the LCD that i use is type CMC216x01..(www.cct.com.my) after i burn my program code inside PIC and run it.. the LED can blink as i want, but the LCD show nothing... before that,the PIC that i program can run well on PICDEM2 PLUS(the LED and LCD...
  8. M

    how to display range number include '+' and '-' on LCD??

    i m using PIC16F877, assembly language to display ADC value on LCD.. before that, i already success to get the display value from 0.00-16.00.. but now i want to display the value from -5.00 until 5.00.. so how should i do in order to get the range?? i had try to display a range of...
  9. M

    problem of display number on LCD

    i m using PIC16F877, i want to display ADC(0-5V) on LCD display that show a number 0.00-10.00.. i didn't use floating point instead i used decimal point to display the 2 digit of division.. the problem is the biggest number that is showed will become out of range.. for example, the formula...
  10. M

    PCB etching stamping..

    i have no choice to use other method.. this task is given by my supervisor, he just ask me to get the stamping price through internet..
  11. M

    PCB etching stamping..

    may i know where can i buy/get PCB etching stamping.. i not sure with its' name.. i just know how it is used.. for a copper board which is used to design PCB, at the place which would like to remain the copper for solder the E&E component, i can place the stamping on the copper board...
  12. M

    how to re-scale analog input?

    i m asking to do an assigment(PIC16F877-ASSEMBLY LANGUAGE) which the input is in analog 5-10V(potentiometer), but the output that i want to show on the LCD rescale became 0.00-10.00(decimal number)... may i know where can i start?? may i know that where can i get the tutorial about this kind...
  13. M

    problem PIC16F877 with LCD...

    since i m new to use PIC control LCD, by using PICDEN 2PLUS demo, i also not sure with the setting of the code related to the port pin location... from the circuit diagram, it's show that DB3-DB6 connect to RD0-RD3, RS,EN,RW connect to RA1-RA3.. i not sure how to define the setting of pin...
  14. M

    problem PIC16F877 with LCD...

    :cry:i m asking to use PIC16F877 to display a text on LCD.. I had try with a lot of LCD example, but the LCD on PICDEMO 2PLUS show NOTHING..:cry::cry::cry: i really really don't know where my mistake..i had spend a lot of time correct the source code, but finally still show NOTHING..:?::?: i...
  15. M

    share the same input port

    i m using four demultiplexs(A,B,C,D). Each demultiplex got 10 outputs (A0,A1,A2,..A9; B0,B1,B2...B9; C0,C1..C9; D0,D1,D2...D9). i now want to put (A0,B0,C0,D0) in one node; (A1,B1,C1,D1) in one node; (A2,B2,C2,D2) in one node and so on.. when i "on" 'A' demultiplex and 'off' 'B,C,D'...
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