| ??? 12/12/09 06:12 Modified: 12/12/09 06:34 Read: times |
#171577 - VGA standard Responding to: ???'s previous message |
Hi Ivan.
Google for VGA. The VGA connector has pin 13 (Hsync) and 14 (Vsync). They are TTL leveled. So, you goal is some circuit that detect in pin 13 pulses between 10KHz and 80KHz aprox. I would use, if only need to turn on a LED, a retriggereable monostable. But if you need/ought/want to use a MCU, how to make the task deppends on the particular MCU and what other tasks must be done. Generally speaking, if you need ONLY lit a LED, any 5V 8052 derivative will work, and you can connect the LED and the Hsync or Vsync to (almost) any pair of I/O pins of the MCU. Of course, after that, you have to write the code to detect the sync signal. Daniel |
| Topic | Author | Date |
| About computer output signal detecte question | 01/01/70 00:00 | |
| What signal? | 01/01/70 00:00 | |
| Which one would be of interest for a µC? | 01/01/70 00:00 | |
| about computer vga output signal | 01/01/70 00:00 | |
| VGA standard | 01/01/70 00:00 | |
Thanks Daniel | 01/01/70 00:00 | |
| Basic electronics | 01/01/70 00:00 | |
| Do you want only to detect a specific LED? | 01/01/70 00:00 |