| ??? 07/06/05 08:08 Read: times |
#96664 - Grounding! Responding to: ???'s previous message |
At a guess I'd say you have two solutions - either isolate your RS232 or use an isolation transformer for your telephone interface.
Think about your problem - the phone line power comes from the phone exchange and is most likely earthed there. You connect your computer which is most likely grounded at your house - most likely a potential difference or at least a phase difference. Got to break the ground loop somewhere! |
| Topic | Author | Date |
| Serial Connector Problem! | 01/01/70 00:00 | |
| Grounding | 01/01/70 00:00 | |
| Grounding | 01/01/70 00:00 | |
| Isolate | 01/01/70 00:00 | |
| B+B | 01/01/70 00:00 | |
| Thanks Andy and Steve | 01/01/70 00:00 | |
| Grounding! | 01/01/70 00:00 | |
| Isolated RS-232 with microcontroller | 01/01/70 00:00 | |
| Just a thought... | 01/01/70 00:00 | |
| picture too big | 01/01/70 00:00 | |
| Sorry for a huge picture | 01/01/70 00:00 | |
| Here is isolated RS232-TTL converter | 01/01/70 00:00 | |
| Info: Members posting pictures | 01/01/70 00:00 | |
| Standards | 01/01/70 00:00 | |
| Re: Standards | 01/01/70 00:00 | |
| is that really less than $3.20 | 01/01/70 00:00 | |
| Re: it that really less than $3.20 | 01/01/70 00:00 | |
| 1000 up prices | 01/01/70 00:00 | |
| that affect everything | 01/01/70 00:00 | |
| Re: that affect everything | 01/01/70 00:00 | |
| reinventing the wheel | 01/01/70 00:00 | |
| will this suffice? | 01/01/70 00:00 | |
| for me, yes | 01/01/70 00:00 | |
| MAX 3250 | 01/01/70 00:00 | |
Slap in the face! | 01/01/70 00:00 |