| ??? 09/30/05 12:26 Read: times |
#101771 - Erik,Andy,Ijaz,Russell Responding to: ???'s previous message |
Erik said:
Ground Andy said:
It'll be nothing specifically to do with the MT8870 - it's the earth on the RS232 line (or, more correctly, the device on the other end of the RS232 line) grounding one of the phone lines. You will need an isolated RS232. Russell said:
you will have the same problem with USB unless you optically isolate your hardware or use a transformer in your DAA. Ijaz Said using transformer in DAA too Thing that made me very happy is that my circuit works with adding any component,not changing all circuit to another one Now please tell me can i use this transformer before phone1 connector in schematic I really need to your kindly advise Thanks Reza |
| Topic | Author | Date |
| MT8870 & MAX232 Compatibility!!! | 01/01/70 00:00 | |
| Ground | 01/01/70 00:00 | |
| Unanimous! | 01/01/70 00:00 | |
| Earthing! | 01/01/70 00:00 | |
| Thanks! | 01/01/70 00:00 | |
| DAA for MT8870 | 01/01/70 00:00 | |
| Thanks Ijaz | 01/01/70 00:00 | |
| Schematic! | 01/01/70 00:00 | |
| To Ijaz | 01/01/70 00:00 | |
| Re: Schematic | 01/01/70 00:00 | |
| Thanks! | 01/01/70 00:00 | |
| Another Question! | 01/01/70 00:00 | |
| The answer is obvious! | 01/01/70 00:00 | |
| Erik,Andy,Ijaz,Russell | 01/01/70 00:00 | |
| Transformer in DAA | 01/01/70 00:00 | |
| Transformer in DAA | 01/01/70 00:00 | |
| Is relay a good choice! | 01/01/70 00:00 | |
| sure, but what would that accomplish? yo | 01/01/70 00:00 | |
| You'll need something like this : | 01/01/70 00:00 | |
| Thanks, | 01/01/70 00:00 | |
| congratulation! | 01/01/70 00:00 | |
| I have used this way too,Reza! | 01/01/70 00:00 | |
similar | 01/01/70 00:00 |