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Recent content by sento

  1. S

    Help me about communicating PIC with cellular phone...

    Check if communiaction speed is OK. I connected SiemensC45 with PIC16F84 and comm.speed must be !!! : 19200 1-8-N-1 19200bps 1 start bit 8 data bits none parity 1 stop bit ... it works (with SieC45); Before i tried communicate PC --- SiemensC45 to get know speed, ... etc bye
  2. S

    Problem with 7805 and 89c51 for transferring data serially to PC

    Re: problem with 7805 serial port on PC have ±12V logic !!! log1 ... H ... -12V ÷ -3V log0 ... L ... +3V ÷ +12V You must convert ±12V to TTL; Use ic MAX232 for voltage conversion.
  3. S

    PIC16F877 - Prescaler - Newbie

    RESET org 0x00 ; zacatek programu goto INIT ; skok na pocatecni inicializaci org 0x04 ; adresa preruseni goto INTERRUPT ;******************** Pøerusení ******************** INTERRUPT movwf TMP_W ; ulozi W swapf STATUS,W ; prohodi nibble STATUS a ulozi do...
  4. S

    PIC Port Problems.....

    connect more chips for 74hc154 Pin 4 (MCLR) must be GROUNDED !!!
  5. S

    Code for displaying temperature on lcd

    Temperature meassuring PIC16F876 & LM35DZ movlw b'01000001' ; fosc/8, kanal 0, A/D on movlw b'01001001' ; fosc/8, kanal 1, A/D on movlw b'01010001' ; fosc/8, kanal 2, A/D on movlw b'01011001' ; fosc/8, kanal 3, A/D on movlw b'01100001' ; fosc/8, kanal 5, A/D on movwf ADCON0 call ANALOG_3...
  6. S

    Looking for C code to decode Sony IR signals

    Re: ir sony need help When Sony IR works with 40kHz, then TSOP 1736 is problem, because TSOP1736 filtered 36kHz signals (+-1-2kHz) When you haven't IR receiver for 40kHz try TSOP1738 (for 38kHz) or distance between IR-sender nd receiver must be maximal 15cm. You are tried another type...
  7. S

    Looking for C code to decode Sony IR signals

    sbx1610 Sony IR works with 40kHz, another IR works with 36kHz. May be, that is the problem.
  8. S

    Help me with PIC 16F628A programmer in Mplab

    Re: help with pic try: bsf STATUS, RP0 ; Bank 1 clrf TRISB ; all ports output output bcf STATUS, RP0 ; Bank 0 or: bsf STATUS, RP0 ; Bank 1 movlw 0x00 ; all ports output output movwf TRISB bcf...
  9. S

    External memory chip for PIC16F877A?

    Programm memory to enlarge is problem; External memory you can use only for data, (for exa. more EEPROM bytes for application., not for program)
  10. S

    what wrong with microcontroller plz help meeeeeeeeeeeeeeeeee

    Re: what wrong with microcontroller plz help meeeeeeeeeeeeee Test if PIC... is OK. After write program into PIC try read program from processor. Must be the same. Then you must check pin connection..., and Watch Dog Timer OFF !!! writed from klug. The last eventuality is bug in program.
  11. S

    Timer0 as 16-bit in 16f877 ?

    for PIC16F84A: RA4 ... input sig. counter mode setting: set T0CS: bsf OPTION_REG,T0CS ; counter mode clear T0SE: bcf OPTION_REG,T0CS ; increment by rising edge clear PSA: bcf OPTION_REG,TSA ; timer/counter prescaler re/set PS2:PS0: binary:000 ;... set prescaler value for exa: 1:2 movlw...
  12. S

    Help me connect 89c51 with 4x3 keypad/ 16x2 LCD/ DTMF encoder/ EPROM

    Re: scemetics Principale schema of keyboard 4*3 and pinout of LDC. (Next 2 pins 15-16 are defined for LED light)
  13. S

    Timer0 as 16-bit in 16f877 ?

    for PIC16F84A: RA4 ... input sig. counter mode setting: set T0CS: bsf OPTION_REG,T0CS ; counter mode clear T0SE: bcf OPTION_REG,T0CS ; increment by rising edge clear PSA: bcf OPTION_REG,TSA ; timer/counter prescaler re/set PS2:PS0: binary:011 ;... set prescaler value for exa: 1:16...
  14. S

    What is the difference between the command of 2x16 LCD and 2x8 LCD?

    2x8 lcd 1. Check if you sent on LCD-Init command: movlw 0x20; , 4-bit-control, 2-lines, 5x7 pixels call OutLcdControl 2. May be, you have LCD 2lines x 8chars, but controller is 1x16 !!! Test it ! Added after 2 minutes: correction !!! movlw 0x28 call OutLcdControl . . .
  15. S

    How can I use a digital value from PIC16F877 to control a solenoid?

    Re: PIC16F877 Dig.output on PIC16F8.. is 10mA ... NO PROBLEM Transistor... for ex. TIP121-122 h(FE) must be min 100; Rele I(L)...50-200mA switching -10A; I forgot diode paralell with rele-coil
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