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Recent content by A.Rashad

  1. A.Rashad

    Matlab Learning tutorial and study Material

    Hello, I have worked on 8051/AVR/ARM7 and familiar with C language, Now I want to start with Matlab and Simulink, can any one suggest me the steps I should follow to learn and start working on these softwares ? please suggest me study material /Book/Online Tutorials for this !!!
  2. A.Rashad

    sim300 INTERFACING WITH ARM

    I need to interface sim300 to ARM lpc2148, sIM300 gsm MODEM is working fine on hyperterminal , but as soon as I connect Tx RX of lpc2148 to Tx Rx of Modem , Its not working, means simultaneously I have connected RS232 cable to GSM modem, I am not able to see any response or command from ARM to...
  3. A.Rashad

    AUBTM-20 interfacong with ATmega8

    show me , how you are sending commands to Bluetooth Module, i.e the section of your C code which sends these AT commands ..
  4. A.Rashad

    Atmega 8 hardware design issues

    Hello, I need to know the exact values of Reset circuit's, component values , and filter capacitors values for supply power to Atmega 8!
  5. A.Rashad

    Atmega 8 hardware design issues

    Hi, I want to study the exact hardware design constraints for ATMEGA 8 , Apart from Datasheet, Is there any other document which explains this ?
  6. A.Rashad

    Bluetooth AUBTM-20 communication

    call receive function and send received character to LCD connected to Micro controller and check what You receives after issuing command , then you can see exact response , and parse this stream of characters and remove cr lf and check only for O and K , can u share your project ? what you are...
  7. A.Rashad

    Bluetooth AUBTM-20 communication

    HELLO , As first ATMEGA 8's TX pin gives 5V and your AUBTM-20 needs max 3.3 Volt so put a voltage translator circuit in between these lines, as far as software code is concerned ,you will have to do following stages to send AT commands to ATMEGA 8 1. Set up necessary Registers for UART for Baud...
  8. A.Rashad

    AVR Fuse Bits setting with Sinaprog

    Hello, No no , actually I am taking 12V for relays, from input of MCU regulator only, Not from the output of regulator. Output of 1117(5V ) is going only to MCU . Yesterday I cheked my design by removing the relays from PCB , its working fine for four LEDs, the problem may be same with power...
  9. A.Rashad

    AVR Fuse Bits setting with Sinaprog

    Hello, Yes I have connected free wheeling diode across all four relays in reverse position(cathode to negative of coil, Anode to Positive 12V of coil) I have used ULN2003 at output port of ATmega8 , But the power source is same for relays as well as for ATMEGA , I will check as you described...
  10. A.Rashad

    AVR Fuse Bits setting with Sinaprog

    The code was posted as attached document
  11. A.Rashad

    AVR Fuse Bits setting with Sinaprog

    Hello Sir , I am now successfully able to set the fuse bytes for external crystal , the chip is detectable again :) But the code runs for 2/3 hours properly, after that the ATMEGA 8 starts malfunctioning , and if i Connect the board to my programmer, again the ATMEGA 8 is not searchable, Is...
  12. A.Rashad

    AVR Fuse Bits setting with Sinaprog

    Hi, Ok sir , I will check , Thank you very much for efforts..
  13. A.Rashad

    AVR Fuse Bits setting with Sinaprog

    Yes sir, my jumper for usbasp is not set ,still no results...
  14. A.Rashad

    AVR Fuse Bits setting with Sinaprog

    hello, Yes My programmer device USBasp its working fine for all the time, Yes once I set the internal 8 Mhz Oscillator , the device reponds searchable and code also runs fine..
  15. A.Rashad

    AVR Fuse Bits setting with Sinaprog

    hello, Yes I checked with programming CKOPT means making that bit 0, i.e 1100100:cry:1 i.e C9 high byte , but it didnt work, my crystal is new , even I have changed lots of crystals and capacitors , also different atmega 8 , but the problem persists .. I tried right now by using AVRDUDE also ...

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