Multiplexing 7 Segment Displays with PIC 16F627 - Electronic Circuits Projects Diagrams Free

alifred · 19th December 2008, 05:40 PM

Hi,

I have a PIC 16F627, and I want to make a digital clock with it. The only problem I have is that I only have enough outputs for one 7-seg display unless I multiplex them.

Can someone please point me in the right direction of multiplexing 6 common cathode 7-seg displays (to show hours, minutes, and seconds).

Thanks to everyone in advance!

Cheers

Fred

ericgibbs · 19th December 2008, 05:43 PM

Quote:

Originally Posted by alifred

Hi,

I have a PIC 16F627, and I want to make a digital clock with it. The only problem I have is that I only have enough outputs for one 7-seg display unless I multiplex them.

Can someone please point me in the right direction of multiplexing 6 common cathode 7-seg displays (to show hours, minutes, and seconds).

Thanks to everyone in advance!

Cheers

Fred

Use the Forum SEARCH for charlieplexing

See Pommies drawing here:
charlieplexing max per pin

alifred · 19th December 2008, 06:00 PM

Cheers,

I was searching with multiplexing not charlieplexing.

Thanks for such a quick reply

Fred

bimalchandran · 21st January 2009, 02:02 PM

Hi,

I have a PIC 16F627 with 32.768khz cristal, and I want to make a digital clock with date and time .I have 7-seg display with cd4543 drivers. Can any one help me to write codes for this pic.I dont have any experiance writing codes.so please help me..

Yours
Bimal

ericgibbs · 21st January 2009, 03:24 PM

Quote:

Originally Posted by bimalchandran

Hi,

I have a PIC 16F627 with 32.768khz cristal, and I want to make a digital clock with date and time .I have 7-seg display with cd4543 drivers. Can any one help me to write codes for this pic.I dont have any experiance writing codes.so please help me..

Yours
Bimal

Start your own new thread for this topic.

bimalchandran · 24th January 2009, 01:35 PM

Quote:

Originally Posted by ericgibbs

Start your own new thread for this topic.

hi

I had found a circuit with 16f627 and time based clock codes.i need this thing with calendar can you help me to devolop it?

Bimal

vinoth · 24th January 2009, 01:48 PM

One simple thing. Just take 8 pin for displaying and connect this to all the six seven segment display and take 6 for controlling displaying. Connect first controlling input to first seven segment displays Vcc(Through transistor) and second contorl pin to second seven seg's Vcc and so on. program will be similar to.

#bit c1=0x05.0
#bit c2=0x05.0
#bit c3=0x05.0
#bit c4=0x05.0
#bit c5=0x05.0
#bit c6=0x05.0
#byte val=0x06

c1=1;
c2=0;
c3=0;
c4=0;
c5=0;
c6=0;
val=disp1;
delay_ms(20);//20 ms delay
c1=0;
c2=1;
c3=0;
c4=0;
c5=0;
c6=0;
val=disp2;
delay_ms(20);//20 ms delay
//so on for all digit.

bimalchandran · 27th January 2009, 01:43 PM

thankyou sir.
I willl try to impliment this..and let you know .

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19th December 2008, 05:40 PM	#1
alifred	Multiplexing 7 Segment Displays with PIC 16F627 Hi, I have a PIC 16F627, and I want to make a digital clock with it. The only problem I have is that I only have enough outputs for one 7-seg display unless I multiplex them. Can someone please point me in the right direction of multiplexing 6 common cathode 7-seg displays (to show hours, minutes, and seconds). Thanks to everyone in advance! Cheers Fred Last edited by alifred; 19th December 2008 at 05:41 PM. Reason: Bad grammar! (My mum would me cross!)

19th December 2008, 06:00 PM	#3
alifred	Cheers, I was searching with multiplexing not charlieplexing. Thanks for such a quick reply Fred

21st January 2009, 02:02 PM	#4
bimalchandran	help Hi, I have a PIC 16F627 with 32.768khz cristal, and I want to make a digital clock with date and time .I have 7-seg display with cd4543 drivers. Can any one help me to write codes for this pic.I dont have any experiance writing codes.so please help me.. Yours Bimal

24th January 2009, 01:48 PM	#7
vinoth	One simple thing. Just take 8 pin for displaying and connect this to all the six seven segment display and take 6 for controlling displaying. Connect first controlling input to first seven segment displays Vcc(Through transistor) and second contorl pin to second seven seg's Vcc and so on. program will be similar to. #bit c1=0x05.0 #bit c2=0x05.0 #bit c3=0x05.0 #bit c4=0x05.0 #bit c5=0x05.0 #bit c6=0x05.0 #byte val=0x06 c1=1; c2=0; c3=0; c4=0; c5=0; c6=0; val=disp1; delay_ms(20);//20 ms delay c1=0; c2=1; c3=0; c4=0; c5=0; c6=0; val=disp2; delay_ms(20);//20 ms delay //so on for all digit.

27th January 2009, 01:43 PM	#8
bimalchandran	thanks thankyou sir. I willl try to impliment this..and let you know .