November 2012
Intermediate to advanced
496 pages
12h 2m
English
Content preview from Using LEDs, LCDs and GLCDs in Microcontroller Projects
Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.
5.9 Alphanumeric LEDs
Alphanumeric LED displays are used to display numerical as well as character data. These displays are similar to 7-segment LEDs, but are usually made up of 14-segments (plus a decimal point). Figure 5.16 shows a typical alphanumeric LED display. The segments are labelled ‘a’ to‘m’. As with the 7-segment displays, numbers and letters are displayed by turning the appropriate segments ON and OFF. The internal structure of a typical 14-segment common anode alphanumeric display is shown in Figure 5.17.
Figure 5.16 A typical 14-segment alphanumeric LED display
Figure 5.17 Inside a 14-segment common anode alphanumeric LED display
Figure 5.18 shows how the numbers, letters and various symbols can be displayed on 14-digit alphanumeric LED displays. Alphanumeric LEDs are connected to microcontrollers in the same as the way 7-segment displays are connected.
Figure 5.18 Displaying numbers, letters and symbols on alphanumeric displays
A table similar to Table 5.3 can be constructed to determine how to display various characters. Table 5.4 shows what hexadecimal code to send to the port where the display is connected to, in order to display numbers ‘0’ to ‘9’ and letters ...
Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
and much more.
Read now
Unlock full access
More than 5,000 organizations count on O’Reilly
O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.