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  1. #1
    Join Date
    Dec 2011
    Location
    Malabe, Sri Lanka
    Posts
    5

    Lightbulb PIC16F84A Microcontroller based Digital Clock

    Hi Friends,

    This is a PIC16F84A Microcontroller based digital clock. It displays hours, minutes and seconds using six 7 segments displays.
    The circuit has three push button switches to reset and set hours and minutes.
    It shows time in 12 hour format.

    Use the following link to download schematic, source code and compiled hex file -

    http://www.manelsoft.com/projects/pi...tal_clock.aspx

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    Have a nice day.!

  2. #2
    Join Date
    Aug 2003
    Location
    Australia
    Posts
    1,057

    Default Re: PIC16F84A Microcontroller based Digital Clock

    Nice

    But I have to ask.. There's a left over pin on portB, 3 more on PortA,
    and the extra chip is only giving you four more pins than it's using.

  3. #3
    Join Date
    Nov 2005
    Location
    Bombay, India
    Posts
    867

    Default Re: PIC16F84A Microcontroller based Digital Clock

    Nice effort. However there seems to be no inter-digit blanking thereby giving the display a washed out appearance.

    I suggest you modify this routine to create the blanking
    Code:
    DELAY		MOVWF PORTB
    		DECFSZ	DEL,1
    		GOTO	$-.1
    		MOVLW 0FFH
    		MOVWF PORTB
    		CALL CLOCK
    		RETURN
    and remember to turn PORTB back to 0FFH to be able to read your keys

    Cheers
    Jerson

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