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Recent content by john168

  1. J

    i have problem about CAN BUS on car

    can bus problems now, i analyse TOYOTA car CAN BUS. i have read the CAMRY 's CAN BUS information. example: CH ID LEN D0-D7 TIME 0 1088 8 66 18 0 0 6 0 0 0 240.649080 R 0 1090 8 64 50 0 0 5...
  2. J

    GPRS tracking system with Benq M22 module

    I want design GPRS trancing system. 8O MCU : PIC16F77 or PIC18F252. GPRS MODEULE: BENQ M22. I know the M22 that have P2P function,But only suport fixed IP. I want to use domain name, but i dont know that to do DHCP. JOHN
  3. J

    Connect two uC's trought GPRS (without PPP stack)?!?

    I already done that GPRS connect SERVER. Because the GPRS is not fixed Ip,2 GPRS connect have problem. JOHN
  4. J

    rabbit 3000 series microproprocessor

    Are you have the design for GPS system
  5. J

    Did you think about power consumption????

    Pic MCU standby current is low. normal less 1 uA I have a design that use pic12c508. (car alarm transmitter)
  6. J

    Links to some free PIC programmer

    free Pic Programmer my design is for adjust pic12cXX INRC frequncy john
  7. J

    Links to some free PIC programmer

    free Pic Programmer Before year ,I have a design. For pic12cxx,pic16c505... programing. It is good.
  8. J

    Cheapest Microcontroller [suggestions required]

    sub $0.50 microcontroller market If need cheapest MCT,select made in taiwan. like EMC,WINBOND.
  9. J

    Can I reprogramming PIC processor?

    There is no problem to reprogram flash MCU of PIC. Program step is: 1,erase all code. 2,program 1 byte,verify 1 byte.If happen error,will stop program. 3,again step 2,still all code program over. 4,protection the code.
  10. J

    Problem with writing on EEPROM 93C46s memory

    EEPROM 93C46 the clock is very high. below is my code,use pic16f72 ,oxc 4MHZ SENDC: BANK_1 MOVLW B'00010000' ; MOVWF TRISA ; BANK_0 ;GOTO $+1 BCF CS_P BCF CLK_P ...
  11. J

    help:I am a student in China started with mcu

    wangcao: I am in ShenZhen,China. if you need help,please tell me. my email:john168168@21cn.com john yin
  12. J

    How to calculate the distance between two points on the Eart

    calculating error between two points C-man: Thanks I use assembler. Hope the code less 500 bytes. John yin (China)
  13. J

    How to calculate the distance between two points on the Eart

    distance between two points spherical earth c++ Thank all My design is tracing system, When car go out the Geo-fence area,the system will send message to Alarm Center. The Geo-fence types will be available:round and rectangular. The round area include two values:the...
  14. J

    How to calculate the distance between two points on the Eart

    geofence calculation :cry: Please help me: How to calculate the distance between two points on the Earth I use pic16f77. latitude and longitude of gps nmea0183. my email:john168168@21cn.com ;----------------------------------------------- Thank all My design is tracing system,When car go out...
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