| ??? 01/22/05 09:21 Read: times |
#85570 - Resistors work too Responding to: ???'s previous message |
It is indeed possible to adjust the threshold with resistors. See how the adjustment of the "simple RS232 receiver" starts to get more and more complicated as we try to fix it up!! As one can see below, resistors are exactly how National addressed the problem with their old work horse RS232 receiver chip. (I guess this part number is essentially defunct at this this point).
 Michael Karas |
| Topic | Author | Date |
| Instead of MAX232 | 01/01/70 00:00 | |
| Dont do this. | 01/01/70 00:00 | |
| I've seen worse! | 01/01/70 00:00 | |
| Hysterisis lacking | 01/01/70 00:00 | |
| pin connectors | 01/01/70 00:00 | |
| The Specs | 01/01/70 00:00 | |
| Check this Kuan | 01/01/70 00:00 | |
| Male/Female? Pin Numbers? - DTE or DCE? | 01/01/70 00:00 | |
| Previous experience | 01/01/70 00:00 | |
| OH NO! NOT AGAIN | 01/01/70 00:00 | |
| Receive-Only | 01/01/70 00:00 | |
| Let's analyse: Why is it wrong? | 01/01/70 00:00 | |
| Why all this excitement? | 01/01/70 00:00 | |
| that's the TTL side | 01/01/70 00:00 | |
| No! | 01/01/70 00:00 | |
| ah-ha! | 01/01/70 00:00 | |
| Then I apologize... | 01/01/70 00:00 | |
| did you mean this | 01/01/70 00:00 | |
| RS232 Bus Input Lines of Receiver | 01/01/70 00:00 | |
| Threshold level | 01/01/70 00:00 | |
| Resistors work too | 01/01/70 00:00 | |
| Rf makes Schmitt-trigger performance | 01/01/70 00:00 | |
| Works for some applications | 01/01/70 00:00 | |
| link, please | 01/01/70 00:00 | |
| found it | 01/01/70 00:00 | |
oh tresting again | 01/01/70 00:00 |