| ??? 09/11/08 13:55 Read: times |
#158189 - datasheets really are your friends Responding to: ???'s previous message |
It is common that a specific color normally has a specific voltage range, but only the datasheet can specify the exact value. All red LED are not made identical. And, as Erik notes, you do not voltage-control a LED. You use the voltage as a factor in your computations, but the goal of the computation is to figure out a way to control the current. If you have a current generator, then you need not know the voltage of the LED - other than to figure out how much loss you get in the LED and how much loss you get in the current generator. |
| Topic | Author | Date |
| voltage rating for Chip LEDs | 01/01/70 00:00 | |
| same, of course | 01/01/70 00:00 | |
| datasheets really are your friends | 01/01/70 00:00 | |
| Voltage | 01/01/70 00:00 | |
| Not so fast... | 01/01/70 00:00 | |
| forward voltage... and series resistance (sometimes)... | 01/01/70 00:00 | |
| nothing exotic | 01/01/70 00:00 | |
| Some numbers... | 01/01/70 00:00 | |
| the question, the answers | 01/01/70 00:00 | |
| Many don't know about datasheets at all | 01/01/70 00:00 | |
| Unfortunately, in real life ... | 01/01/70 00:00 | |
| thank you every one for your advice | 01/01/70 00:00 | |
| series 0805 | 01/01/70 00:00 | |
| 0805 = package size | 01/01/70 00:00 | |
| Select-On-Test | 01/01/70 00:00 | |
| yeah its better to buy a few and test them | 01/01/70 00:00 | |
| Test for what? | 01/01/70 00:00 | |
| RE: Test for what? | 01/01/70 00:00 | |
| Usually... | 01/01/70 00:00 | |
| all i can find are hobbyist suppliers. | 01/01/70 00:00 | |
| Try "real" parts sources ... | 01/01/70 00:00 | |
| No, no, digikey isn't that nice... | 01/01/70 00:00 | |
Digikey | 01/01/70 00:00 |