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  1. S

    IGBT H-bridge 2110, microntroller does't respond on High voltage input

    Thanks man, can you please define what do you mean by high speed capacitors, is that mean ceramic capacitors, although we use cerimic multilayer capacitors
  2. S

    IGBT H-bridge 2110, microntroller does't respond on High voltage input

    Here are the sch of all of the circuit, please tell me, DC-DC and DC-AC stages working fine independently but when we input from DC-DC stage to DC-AC stage, the microcontroller stops working, please remember we are using IRG4pc50ud IGBTs
  3. S

    IGBT H-bridge 2110, microntroller does't respond on High voltage input

    hi, we are going to make a 2 stages sine wave inverter using IGBT H-Bridge on DC-AC stage, when we apply 12V DC power source on H-bridge the circuit works okey, but when we provides high voltage DC from DC-DC stage, which is about about 350volts at input the microntroller(PIC18f26k22) does't...
  4. S

    Multiple files MP3 decoder

    is any body here to help ?
  5. S

    Multiple files MP3 decoder

    Hi, I want to make a multi channel MP3 player, This means i need to play at-least 4 different files from single source(SD card etc) in real time, please advise me weather i use micro-controller+vs1011e variant chips or implement a software in raspberry pi, FPGA PIC32 etc
  6. S

    sim900 Suggested Power Design Over Voltage

    I used regular 5 volts regulator and a diode in series, works
  7. S

    [General] USB to RS232 CH340 communication problem

    Its complete cable assembly When i use this cable as a null modem eg connecting directly pin 2 to pin 3 it send and receive same character but I also tried TUSB3410 complete cable assembly but its also not working as null modem i did not test with micro-controller, I test this cable to send...
  8. S

    [General] USB to RS232 CH340 communication problem

    I am using USB to RS232 (CH340) cable to communicate with micro-controller I tried both 89s51 and PIC 16f628A both controller working well when using in Proteus simulation but when i try i in hardware I receive unknow charactors , I am using asynchronous communication , can any body help how...
  9. S

    SSR design,reducing switching time using voltage and current zero cross detecting

    I am making a solid state relay using mox3040 zero cross detection and BTA12-600 Triac, The purpose of this Project is to switch the power source on failure in minimum possible time, For failure detection, I am using ADC of 18f452, by sampling whether the power is fail or not , In general we...
  10. S

    Wireless communication using DTMF and RS232 protocol

    I am afraid to say that my propose not exactly to use audio tones, but is to make a digital wireless link by means of any thing that can we use instead of RF modules, in simpler way I want to do it using without RF modules, My poor knowledge says that audio tones is a way, because such a...
  11. S

    Wireless communication using DTMF and RS232 protocol

    Yes i know its slow but I just realize that its very very slow, Perhaps it will work or not, for sending and receiving commands and status to general equipment like switching and data longing sensors eg. fan speed, temp. relay To make it fast, i just get a new idea, that is to eliminate the...
  12. S

    Wireless communication using DTMF and RS232 protocol

    Yes u r right, but the RF modules use in embedded application are costly not ordinary FM/AM Rx Tx. Here is a block diagram of
  13. S

    Wireless communication using DTMF and RS232 protocol

    Due to high price of Wirless modules I am going to design a cheap solution that is to convert rs232 signals to dtmf tones and send it over air and in reverse process retrieve it back, i have no idea how to send digital signals over air using easy to find components, I need help me on it...
  14. S

    [SOLVED] [Moved] Config bits in HI-TECH C Compiler for PIC10/12/16 MCUs (Lite Mode) V9.83

    how to set config bits in 16f887 as it have MCLR enable/disable capability and also internal osc, I am getting problem to use internal osc, and also gives problem with original LCD.C problem, it gives busy statement while simulate on Proteus, so i change __delay_us(E_Delay) to __delay_us(10)...
  15. S

    uC programmed but does not works

    Yeh is just got a new one, i think this is not a reasion. The oscillator freq is 20Mhz. The code i use in MikroC is for 80s52 void main () { unsigned char j=1; for(;;) { P0=j; // same as for pic, with TRISA=0; and...
  16. S

    uC programmed but does not works

    It does not works, LED is continuously ON
  17. S

    uC programmed but does not works

    I am trying to implement a simple blinking circuit on bread board to checking purpose I try for both atmel 89s52 and PIC18F452 for testing I program 89s52 on Mickro C and Keil, and PIC18F452 on Micro C and CSS C as well I use old computer power supply to power them, I am using Genius G540 to...
  18. S

    8x8 keypad code needed and library customization

    i have got such a errors after all, as i am using latest version of mikroC 5.61, also i did not simulate it on Proteus as it works or not, 0 1139 Available RAM: 352 [bytes], Available ROM: 8192 [bytes] 0 126 All files Preprocessed in 16 ms 0 122 Compilation Started keypad_lib.h 193 123...
  19. S

    8x8 keypad code needed and library customization

    -i need a code for 8x8 keypad for a mikroC compiler. . . as built in library function is limited for 4x4 keypad, - is any way to edit library function or make a new one?
  20. S

    PCB printout scalling problem

    actually i am going to make pickit2's PCB, i try several times to printout, but their is always a problem with scaling, that, pcb print is always little bit smaller then the orignal one, that i can not place a IC in it, as their is many schematic diagrams are available i try 2 of them, but the...

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