| ??? 09/02/08 00:53 Modified: 09/02/08 00:54 Read: times |
#157891 - Hardly... Responding to: ???'s previous message |
Alex said:
When the output of my op amp circuit is not connected to the 2051 the output goes up to 5V (Vcc). The LM358 has a push-pull in the output with a npn-Darlington connected to Vcc. So you will hardly ever see a potential at the output that is higher than Vcc-1V. Alex said:
As soon as I connect it to one input of the 2051 (P1) is goes to 1.5V and I can't read it via code. Configured the according port as input? What do you read actually? P1?? Which P1?? P1.0/P1.1?? Or P3.6?? And the 2051 is a AT89C2051?? Hey Alex, why too lazy to tell us the complete story?? Kai |
| Topic | Author | Date |
| LM358 and 2051 | 01/01/70 00:00 | |
| What does "doesn't work" mean? | 01/01/70 00:00 | |
| Voltage level | 01/01/70 00:00 | |
| Hardly... | 01/01/70 00:00 | |
| More details. | 01/01/70 00:00 | |
| You need to make sure,.... | 01/01/70 00:00 | |
| Have u checked Pin voltage | 01/01/70 00:00 | |
| Check list | 01/01/70 00:00 | |
| Oops... | 01/01/70 00:00 | |
| Amazing.... | 01/01/70 00:00 | |
There You Go | 01/01/70 00:00 |