| ??? 04/30/08 14:25 Modified: 04/30/08 14:31 Read: times |
#154222 - Rather useless Responding to: ???'s previous message |
Shivaram said:
Try to connect a pull up resistor of 10K to the port pins and try. This should solve your problem. Sherif has connected a LED to the output and tried to source too much current so that the output voltage broke down. Connecting a pull-up of 10k would not result in enough support. A much better approach is to make the micro sink the LED current. Kai |
| Topic | Author | Date |
| need help....8051 output voltages... | 01/01/70 00:00 | |
| Which port? | 01/01/70 00:00 | |
| thank Daniel but,,,, | 01/01/70 00:00 | |
| i`'m using at89c51 | 01/01/70 00:00 | |
| From the datasheet | 01/01/70 00:00 | |
| thank you | 01/01/70 00:00 | |
| made it a FAQ | 01/01/70 00:00 | |
| What? The hint to have a look at datasheet? | 01/01/70 00:00 | |
| OK I added that, too | 01/01/70 00:00 | |
| And this FAQ | 01/01/70 00:00 | |
| try this | 01/01/70 00:00 | |
| Rather useless | 01/01/70 00:00 | |
| Re-Kai Klaas | 01/01/70 00:00 | |
LED connection | 01/01/70 00:00 |