Talk:Seven-segment display

Making 7-seg numbers on dot-matrix displays

Number displays on LCDs are often seven-segment too, and one see seven-segment done with lightbulbs on big scoreboards, so one could say that this is a general technique for displaying numbers with on-off elements. Stan 21:49, 23 Mar 2004 (UTC)~

Capital N

How do you make a capital "N" with 7 segment display? I don't see how that is possible dispite the article's claim. --Anonymous

See below---capital N to the left, lowercase n to the right. As you see, the "capital N" is really nothing more than a double-height lowercase n. Not obvious at all, I guess.

 AAAA
F    B
F    B
F    B
            GGGG
E    C     E    C
E    C     E    C
E    C     E    C

As noted in the article: to make out some of the letters mentioned requires previous experience and some good will as well, I'd say. :-) We should make an illustrative graphics image of the letters to clarify this. I might do it meself if no one beats me to it. --Wernher 15:35, 15 May 2005 (UTC)[reply]

why the common anode configuration is needed for 7-segment display rather thatn the common cathode configuration

This section was moved here from the article so as to encourage further work on the wording before potential inclusion into the article.
--Wernher 01:43, 1 November 2005 (UTC)[reply]

It is because if common anode is used, the current must be large enough to light on the LEDs. If the common cathode is used, the input will be connected by other IC which may not have enought current to light the LEDs on.

Mechanical 7-segment displays

The section on implementation mentions LED and LCD versions. Gas stations often show their prices in big signs (totems) at the street, and volume and price in small displays at the filling post, using electormagnetic 7-segment displays, where 7 coloured bars rotate to show either a side contrasting with the background, or one coloured as the background. They deserve mention here, I think, but I don't know what they are called. Can someone write this properly?--Niels Ø 10:57, 28 November 2005 (UTC) - - - Here's a commercial site for displays of that type: [1]. I've made the addition myself, using some terminology I found following links from that site.--Niels Ø 11:28, 20 January 2006 (UTC)[reply]