| ??? 02/17/10 21:17 Read: times |
#173231 - 89S52 and multiple PWM |
Hello.
I want to control some RGB LEDs using an 89S52 receiving the data via serial. After some tries I discovered it is an exchange of the actualization rate (frame rate?) and number of outputs... the more outputs the less "frame rate" With 8 outputs I would get around 30 "FPS" which is ok, but I may need more outputs and want to code some more things here. So I'm asking you for some idea on how to deal with it without changing the uC... I was thinking in some type of external PWM IC... maybe I2C, does exists some like this? I thought also in doing part of it analogic, something like this I dont know if works: some latches ICs with a R/2R net driving a transistor that drives the LED, this way I would only need to use the uC time when need to change the output. Any idea is welcome. Thanks. |
| Topic | Author | Date |
| 89S52 and multiple PWM | 01/01/70 00:00 | |
| Speed | 01/01/70 00:00 | |
| is 2 times 5 less than 8? | 01/01/70 00:00 | |
| processor sugestion + PWM IC | 01/01/70 00:00 | |
| you need to describe EXACTLY | 01/01/70 00:00 | |
| what I want | 01/01/70 00:00 | |
| clarify? | 01/01/70 00:00 | |
| 1st DMX 2nd auto | 01/01/70 00:00 | |
| ??? | 01/01/70 00:00 | |
| Agreed | 01/01/70 00:00 | |
| RGB and PWM | 01/01/70 00:00 | |
| ??? | 01/01/70 00:00 | |
| GIVING UP! | 01/01/70 00:00 | |
| What is the point of it? | 01/01/70 00:00 | |
| misunderstood | 01/01/70 00:00 | |
| ideas and giving up | 01/01/70 00:00 | |
| look at some servo code (recently published on this forum) | 01/01/70 00:00 | |
| Faster PWM | 01/01/70 00:00 | |
| PWM | 01/01/70 00:00 | |
| check this | 01/01/70 00:00 | |
| randomly bumped on TM1803 | 01/01/70 00:00 | |
| PCA9685 | 01/01/70 00:00 | |
tlc5947 | 01/01/70 00:00 |