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Recent content by rajtech

  1. R

    Digial signal to micro controller

    First Define the i/o to Digital input, then connect the sensor output directly to MC digital input pin. you can use 7805, it will work up to 1 A load
  2. R

    [SOLVED] NEED HELP for ADC programming

    Hi, Please connect VRef Pin to 5v if you want to adc input 0 to 5 v, if u want adc input 0 to 3v then connect Vref pin to 3v.
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    Interface DVD ROM (PC DVD writer) with micro SD and LCD.

    Dear All, If we want copy the data from CD to memory chip we need a PC and memory Card Reader , Is it possible without the computer and card reader?. My idea of this project is to read the information(audio or video or data) from the CD or DVD using DVD ROM and send the data to memory chip.(...
  4. R

    Pic16f877 timer 0 problem.

    pls help. thanks
  5. R

    Pic16f877 timer 0 problem.

    Hi, I am using pic17f877 to measure motor speed in RPM. I connect sensor output(pulse) to RB0 interrupt. Turn ON Timer0 and check the RB0 pin for every 1 sec to count the pulse and then multiply the data with 60 to get RPM -- per 1 min. Here is my code, Pls help me to check and advice me , is...
  6. R

    Interface AT/PS2 keyboard with pic16f877

    Thanks for your support, you are really great, i have to donate 1000 points for this. Added after 5 hours 21 minutes:
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    Keybord Interfacing with AT89C2051 Microcontroller

    Hi, Please help to answer, how you handle the keyboard code, when we press the keyboard key, it will generate make code, when we release the keyboard key , it will generate break code. key pressed: A. make code: 1C. key released : break code F0, 1C. My question is how you read these three...
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    Can Anybody tell the abbreviation of "asm"

    ASSEMBLY ====> asm
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    32.768Khz oscillator with PIC16f877a

    Hi Eswaramoorthy K V , You cannot use this crystal in pic16f series, this crystal normaly used in digital clock applications. (together with DS1307),
  10. R

    Using multiple A/D channels on the ADuC841 microcontroller

    Re: Using multiple A/D channels on the ADuC841 microcontroll i will check the datasheet
  11. R

    Interface AT/PS2 keyboard with pic16f877

    Re: Interface keyboard with pic16f877 Hi, any other guide, please help. thanks
  12. R

    my LCD shows only solid block

    Hi, Sometimes due to the wrong wiring or loose contacts, pls check
  13. R

    why commonly we are using black colour wire as a ground ?

    Re: why commonly we are using black colour wire as a ground Wiring for AC and DC power distribution branch circuits are color coded for identification of individual wires. In some jurisdictions all wire colors are specified in legal documents. In other jurisdictions, only a few conductor colors...
  14. R

    where to buy MC55i on Bulgaria market?

    Re: MC55i watson trades . balgaria
  15. R

    moving message display - help needed

    Hi, do u have the circuit or any idea , please give more detail about your project, i am also working moving message display, i can help u.

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