| ??? 07/31/08 17:39 Read: times |
#157182 - you can't Responding to: ???'s previous message |
I need to make a bar graph which is 5 LEDs wide. I thought if I parallel the 5 leds together which will parallel the corresponding output driver pins together, will simplify my PCB design greatly.
I searched the datasheet of the ST2221C but there is no mention of paralleling. you can't, LEDs have quite a tolerance on Vf BUT, you can connect them in series. Erik |
| Topic | Author | Date |
| Outdoor Display 2 | 01/01/70 00:00 | |
| you can't | 01/01/70 00:00 | |
| seconded | 01/01/70 00:00 | |
| Have seen parallel-connected LEDs | 01/01/70 00:00 | |
| Who broke the breaks? | 01/01/70 00:00 | |
| Lousy, cross-wired fingers | 01/01/70 00:00 | |
| in series!! | 01/01/70 00:00 | |
| Uneven load | 01/01/70 00:00 | |
| most often for pure mechanical reasons | 01/01/70 00:00 | |
| Temperature Problems | 01/01/70 00:00 | |
| Don't connect | 01/01/70 00:00 | |
Serial connection it is | 01/01/70 00:00 | |
| the problem with the 16 bitters | 01/01/70 00:00 |