| ??? 07/06/05 07:13 Modified: 07/06/05 07:25 Read: times |
#96659 - Serial Connector Problem! |
When i connect serial connector to my board,I can't send and recieve DTMF signal through the phone line,
Since i only attach serial connector one time at a month it can't be a vital problem,But i am puzzled why that? Also when i attach serial connector to my board i hear a hoom sound in my earphone!Either the power is on or off! I guess it is for same Ground-ing of PC and Board! If i am right,How can i solve it? |
| 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 |