| ??? 05/31/06 08:25 Read: times |
#117345 - Quiz question Responding to: ???'s previous message |
I said:
Using a 7 Segment Display
How to control a seven segment display with an 8051 based microcontroller... http://www.iguanalabs.com/7segment.htm I just looked closer at that page, and read the following: http://www.iguanalabs.com/7segment.htm said:
Rather than using a resistor from each LED to ground, you can just use one resistor from Vcc to pin 3 [the common anode pin] to limit the current. Advanced question for extra points: What would be the disadvantage of using a single resistor? |
| 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 |