| ??? 05/31/06 11:05 Modified: 05/31/06 11:07 Read: times |
#117348 - More Basics Responding to: ???'s previous message |
Arvind Shrivastava said:
Sir I am not getting the concept at all THAT WHAT IS THE DIFFERNCE IN THE COMMON CATHODE AND COMMON ANODE THERE'S NO NEED TO SHOUT! Have a look to the following code for common anode ... where Forget about code for now; Common-Anode and Common-Cathode is to do with the physical wiring of the LEDs. You do understand what an LED is, and that it has an Anode and a Cathode (sometimes written "Kathode"), don't you? You need to understand how this works physically before you can even start to think about how to write programs to use it! As I said before, the difference would be immediately obvious if you obtained a datasheet for a Common-Anode display, and a datasheet for a Common-Cathode display, and compared the two. Anyhow, here is the schematic of a Common-Anode 7-Segment display: 
Look how all the Anodes are connected together - they are said to be Common because they share a single, Common connection! And here is is the schematic of a Common-Cathode 7-Segment display: 
Look how all the Cathodes are connected together - they are said to be Common because they share a single, Common connection! For further details, see http://www.hcc.hawaii.edu/~richardi/113/c113_2f/2f_2/2f2.htm |
| Topic | Author | Date |
| 7 segment display | 01/01/70 00:00 | |
| Basics | 01/01/70 00:00 | |
| More guidelines | 01/01/70 00:00 | |
| More Basics | 01/01/70 00:00 | |
| Not at all | 01/01/70 00:00 | |
per-pin, per-port, and whole-chip limits | 01/01/70 00:00 | |
| some of the answers? | 01/01/70 00:00 | |
| Didn't search first | 01/01/70 00:00 | |
| Quiz question | 01/01/70 00:00 | |
| answer | 01/01/70 00:00 | |
| it's usually a background task | 01/01/70 00:00 | |
| Yes, but... | 01/01/70 00:00 | |
| It's a good place to start. | 01/01/70 00:00 | |
| Base on posts, timing seems to be | 01/01/70 00:00 | |
| Timing | 01/01/70 00:00 | |
| Yes, it looks like homework | 01/01/70 00:00 |