| ??? 03/03/05 20:31 Read: times |
#89038 - Display of LED problems Responding to: ???'s previous message |
My friend stop uses ready matrix of LED, because it work no identical.
Now we use matrixes builded from LED on PCB. It works better. The problem is when one partia of LED ends. Socond works minimaly different. Warm is a problem, but we use simply plate from aluminium with holes for every LED. PCB is two sided. And in big Matrix we add fun. To correct problem of heating we use a pulse driving of LED. And changing Britness with PWM. Every lline have own driving transistoer MOSFET cooling by specjal radiator. |
| Topic | Author | Date |
| Further thoughts on large LED displays | 01/01/70 00:00 | |
| Practical findings | 01/01/70 00:00 | |
| I'd agree | 01/01/70 00:00 | |
| cost... | 01/01/70 00:00 | |
| Except | 01/01/70 00:00 | |
| Heatsinking | 01/01/70 00:00 | |
| Luxeon heatsinking | 01/01/70 00:00 | |
| Much brighter discrete LEDs | 01/01/70 00:00 | |
| 5 x 8 matrices | 01/01/70 00:00 | |
| size | 01/01/70 00:00 | |
| Contradictory requirement! | 01/01/70 00:00 | |
| This works | 01/01/70 00:00 | |
| "spider" LEDs are cool | 01/01/70 00:00 | |
| but that requires | 01/01/70 00:00 | |
| ...and also... | 01/01/70 00:00 | |
| track width | 01/01/70 00:00 | |
| 1 mm track | 01/01/70 00:00 | |
| Display of LED problems | 01/01/70 00:00 | |
| color code | 01/01/70 00:00 | |
Big sign | 01/01/70 00:00 |