| ??? 11/29/10 19:23 Read: times |
#179717 - I measured 80mA... Responding to: ???'s previous message |
Andy said:
As far as I can see, these have the LED connected directly across the coin cell with no current limiting resistor! With a fresh CR1632 directly connected to a red LED I just measured 70...80mA through the LED while about 2.0V dropping across it! A bit too much for a standard LED, especially as the current doesn't break down rapidely... I guess, like Neil, that these LEDs come with an internal current limiting resistor or show a high threshold voltage. Kai Klaas |
| Topic | Author | Date |
| LED "Throwies" | 01/01/70 00:00 | |
| Built in? | 01/01/70 00:00 | |
| RE: Built in | 01/01/70 00:00 | |
| I measured 80mA... | 01/01/70 00:00 | |
| Cheap batteries | 01/01/70 00:00 | |
| are resistors expensive? | 01/01/70 00:00 | |
| There's the thing... | 01/01/70 00:00 | |
| No, but uncool! | 01/01/70 00:00 | |
| Uncool | 01/01/70 00:00 | |
| Yes, even dangerous... | 01/01/70 00:00 | |
Longer lead | 01/01/70 00:00 | |
| Yes - but... | 01/01/70 00:00 | |
| No resistors | 01/01/70 00:00 | |
| Life-times... | 01/01/70 00:00 | |
| Indeed! | 01/01/70 00:00 |