| ??? 12/16/07 19:44 Read: times Msg Score: +1 +1 Good Answer/Helpful |
#148344 - The LED is a factor! Responding to: ???'s previous message |
I once had a considerable supply of LEDs that had sufficient inherent series resistance that they could be connected across the 5-volt supply without damaging them. I have others that light up pretty brightly with just one or two mA flowing through them.
You should know what the requirements of the LED for full brightness and the limitations on current are before powering one up. RE |
| Topic | Author | Date |
| problem in blinking LED | 01/01/70 00:00 | |
| use a transistor to drive your LED | 01/01/70 00:00 | |
| How did you connect the LED? | 01/01/70 00:00 | |
| RE: How did you connect the LED? | 01/01/70 00:00 | |
| and where goes the other end? | 01/01/70 00:00 | |
| RE: and where goes the other end? | 01/01/70 00:00 | |
| Wrong way up! | 01/01/70 00:00 | |
| the other way around | 01/01/70 00:00 | |
| check anode/cathode of led | 01/01/70 00:00 | |
| What LED? | 01/01/70 00:00 | |
| The LED is a factor! | 01/01/70 00:00 | |
| Built-in resistors? | 01/01/70 00:00 | |
| changing the polarity helps | 01/01/70 00:00 | |
| Need more detail | 01/01/70 00:00 | |
| Help others | 01/01/70 00:00 | |
| solution tht worked | 01/01/70 00:00 | |
| neve drive led directly with an 8051 , always | 01/01/70 00:00 | |
Wrong - there's nothing wrong with direct drive... | 01/01/70 00:00 | |
| Well done | 01/01/70 00:00 |