Comments on: Interfacing Seven Segment Displays

By: Subin

Subin — Thu, 12 Jan 2012 10:33:58 +0000

hey saurabh,7 segment display is used for displaying numbers and not alphabets.coz u cant display “N” and “T” if i am right….

By: kakkadavan

kakkadavan — Mon, 09 Jan 2012 20:41:58 +0000

hey avinash,
what will the frequency @ base of each transistor?
if there is 3 transistor 3Hz?

By: Saurav

Saurav — Tue, 21 Jun 2011 13:28:22 +0000

Ho gya ji
ho gyaaaa………
TANKHU JI

By: seven segment display operation

seven segment display operation — Sun, 19 Jun 2011 17:10:12 +0000

[...] Control 7 segment LED displays with AVR – Scientific, embedded, biomedical, electronics contents. Interfacing Seven Segment Displays | eXtreme Electronics Interfacing Temperature Sensor with AVR Microcontrollers – LM35 | eXtreme Electronics Multiplexed [...]

By: connecting microcontroller to seven segment led..??

connecting microcontroller to seven segment led..?? — Fri, 18 Feb 2011 04:34:32 +0000

[...] to seven segment led..?? refer this site for help PIC Tutorial* Ten – 7 Segment LED's Interfacing Seven Segment Displays | eXtreme Electronics " It is so simple to be happy, but it is so difficult to be simple" [...]

By: alfanumeric Display Require

alfanumeric Display Require — Wed, 02 Feb 2011 08:29:21 +0000

Dear Sir,

I need alfanumeric display 2″ & Seven sigment Display1/2″

Regards
Ajit Kumar
09958816356

By: Avinash

Avinash — Wed, 19 Jan 2011 03:28:32 +0000

@Vishwanath
because the display is CA (or common anode) so the segments are Cathode (-) of the LEDs and the common is Anode (+). So lit a segment we need to ground them that is why we put 0 (or GND) to the segment.

By: vishwanath

vishwanath — Tue, 18 Jan 2011 18:06:38 +0000

i did not get the fact that to light up a segment we need to give logical low.why not high as in most cases

By: Aakash

Aakash — Sat, 25 Sep 2010 13:26:27 +0000

Thank you!! It helped me a lot!!

By: john mark

john mark — Sat, 07 Aug 2010 08:46:11 +0000

weahhhhh

By: Avinash

Avinash — Wed, 23 Jun 2010 06:08:12 +0000

@Mayan

So that user can change the port assignment for displays easily !!!

If some one wants the disp on PORTA, he/she just need to change that in one place.
This process is called configuration.

If a program is really bit and complex, we have a separate config.h file.

So the user just need to open up the config.h file change the required options and Voilla the program is now ported for the new platform !!!

If the program is really really big. Then we supply a windows GUI software for editing the configuration file. So now the user just need to fire the GUI find a selection area for display, use the drop down box to simply select the seven segment port of his/her choise !!! If you have changed windows wallpaper or changed the rigtone of your mobile you must be know what ease these GUI provide!

By: nazia

nazia — Wed, 23 Jun 2010 05:00:37 +0000

hi,
could you please help me in coding the program to interface 4-digit 7 segment display using pic16f877a using mplab IDE software…

By: Mayank

Mayank — Sun, 13 Jun 2010 20:12:36 +0000

Well, I couldn’t understand the followings lines:

SEVEN_SEGMENT_DDR=0xFF; //All output
SEVEN_SEGMENT_PORT=0xFF; //All segments off

I mean, we can use DDRD or PORTD, but what’s the logic behind using SEVEN_SEGMENT before them?? Is this some kind of macro?

Thanks…
Mayank Prasad

By: aniket bhor

aniket bhor — Tue, 18 May 2010 18:36:17 +0000

thank you sir,this article has helped me a lot

By: bharat kasyap

bharat kasyap — Thu, 06 May 2010 10:38:29 +0000

thank you sir .the inormation in this article helped me a lot.

By: Indika

Indika — Thu, 06 May 2010 04:23:21 +0000

thanks for your commitment.I appreciate your job to publish these informations about pic with 7 seg.wish u all the best.

By: John Michael

John Michael — Fri, 23 Oct 2009 23:42:55 +0000

Thank you so much. This article helped me a lot.

By: saurabh agarwal

saurabh agarwal — Wed, 21 Oct 2009 12:30:25 +0000

Design a seven segment display which displays “INDIA IS GREAT “with certain delay (say 5 sec) between successive letter displays in continuously……….
………..
HELP ME PLEASE ITS URGENT

By: Interfacing LCD Modules with PIC Microcontrollers. | eXtreme Electronics

Interfacing LCD Modules with PIC Microcontrollers. | eXtreme Electronics — Sun, 11 Oct 2009 03:51:36 +0000

[...] numerical, textual and graphical data to user. For very simple numerical display we can use 7 segment displays. If the requirement is little more than that, like displaying some alphanumeric text, we can use [...]

By: Avinash

Avinash — Sun, 02 Aug 2009 04:50:40 +0000

@David

Please note TIMING depends on CPU speed. I clearly said it is for 12Mhz external crystal.

In this example timing didn’t matter much but in complex examples what you can get is black LCD screens (instead of an intended message) or no response to remote control signals, no resonse to data transfer. Because timming realy matters in those case!!!