| ??? 11/25/10 16:06 Read: times |
#179616 - What are the switches? Responding to: ???'s previous message |
What are you using to switch the LED's on/off? The fact they're still glowing suggests that there's still current flowing through the LED's, so the switches aren't fully off. Surely you're not expecting the PCI to handle those 24-volts, so you must have some sort of switch in the path.
What am I missing here? Have you considered a MOSFET in the 24-volt supply? RE |
| Topic | Author | Date |
| Switch off a LED array | 01/01/70 00:00 | |
| What are the switches? | 01/01/70 00:00 | |
| Virtual ground at 3.3V | 01/01/70 00:00 | |
| 3.3V Regulator Idea | 01/01/70 00:00 | |
| The 3.3V regulator idea might not work! | 01/01/70 00:00 | |
| It is a SOURCE board ... | 01/01/70 00:00 | |
| Hhm, leakage currents? | 01/01/70 00:00 | |
| Solution in sight | 01/01/70 00:00 | |
| LED tester shows bad design/bad parts | 01/01/70 00:00 | |
| Who is the designer ?? Stand up.... | 01/01/70 00:00 | |
| LED tester shows bad design/bad parts | 01/01/70 00:00 | |
| I wouldn't rely on anything published by NI | 01/01/70 00:00 | |
| crying wolf again?? | 01/01/70 00:00 | |
| NI is not a fly-by-night-operator | 01/01/70 00:00 | |
| No question about that | 01/01/70 00:00 | |
| The "crying wolf" is right here... | 01/01/70 00:00 | |
| I also say it... | 01/01/70 00:00 | |
Leakage current analysis | 01/01/70 00:00 | |
| Also, the voltage across the load.... | 01/01/70 00:00 |