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Recent content by user1111

  1. U

    USB communication from PIC 16F877

    it's not possible until and unless u use intermediate chips. instead u can use pic with usb support like 18f2550,18f4550
  2. U

    What is the minimum pulse width one can generate using a LM555 timer?

    site:www.edaboard.com timer first of all go through the datasheet of 555 .
  3. U

    Interfacing RS232/USB/Parallel port to 8051 microcontroler

    microcontroler I think PIC microcontrollers with usb support helps you.
  4. U

    PIC16F628 PURE SINE WAVE INVERTER CIRCUITS

    sinewave inverter circuit you may find some reference designs in microchip's site
  5. U

    debugging AT89s52 -my whole circuit is not working

    debugging at89s52 you can use Proteus software for simulation of microcontroller based circuits. For software portion,you can use Keil or SDDC compilers. You can use flow control NONE
  6. U

    interfacing 8051 to pc with user interface

    interface 8051 with pc What type of interface do you want?? Is it parallel port,serial port or usb??
  7. U

    RS232 Communication - code is not behaving as expected

    Re: RS232 Communication you can use the cores found in www.opencores.org
  8. U

    12v 7ah charger circuit needed

    12v7ah charger hi i have 12v 7ah ups battery and 500ma 15-0-15 transformer. Can any body recommend good charging ciruit with over voltage protection.
  9. U

    How to merger 2 vcd file

    merge vcd you can just create movie from two vcd files using movie maker or nero. or you can use total video converter to combine
  10. U

    USB port as power supply / charger

    usb port +supply usb can handle upto 500mA current. You should know about this limit before ysind it as power supply. If you circuit draws excess current it may damage your broad permanently
  11. U

    Re: microcontrollers - 89c51 or 89s52 ? need help

    Re: microcontrollers 8051 is easy to learn. You can use comploiers like keil or sdc to write code in C/assembly.It is not difficult either. If you are not going to use watchdog timer or you did nst want timers andk memorry is sufficent for you , you can use 51 otherwise s52
  12. U

    adc in pic16f877a written in C - help needed

    htc.h tmr1if #include<htc.h> #define ADC_DIR TRISA #define DISPLAY_DIR TRISB #define INPUT PORTA #define OUTPUT PORTB #define S0_dir TRISC6 #define S1_dir TRISC7 #define S0 RC6 #define S1 RC7 #define IN 0xFF #define OUT 0x00 #define in 0b1; #define out 0b0; unsigned char aaaa; void...
  13. U

    What DSP board should I buy -> I AM A NEWBIE

    I think you should go for fpga board optimized for dsp like spartan 3a dsp
  14. U

    RS-232 Receiver and Transmitter Design in VHDL

    vhdl code for transmitters i think it will help you https://academic.csuohio.edu/chu_p/rtl/fpga_vhdl_book/fpga_vhdl_sample_chapter.pdf
  15. U

    Image Processing On FPGA (feature extraction from face imge)

    image processing fpga What type of FPGA kit are you using? Does it suppotr embedded processor or not?? I recommend you to perform camera interface and mathmatical tasks like convolutions ,fft, addition,multiplication etc requiored for pre-processing in Hardware (vhdl/verilog). Then storing...
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