| ??? 10/24/07 12:23 Read: times |
#146129 - since you control both ends ... Responding to: ???'s previous message |
The problem with this project is it has a very small communication distance and I feel RS485 is an Over kill
better safe than sorry moreover can RS485 work well for small distances of few feet?. what makes you wonder about that? But anyways that wouldnt be a low cost solution . since you control both ends why not use RS422, the transceiver cost is about the same as RS232, for instance the DS8921AMX transceiver cost $0.60 at DigiKey. Actually I have a main board for measurement and its display board few feet away, and the project cost has to be as low as possible. see above Erik |
| Topic | Author | Date |
| UART Maximum | 01/01/70 00:00 | |
| Baud rate ? | 01/01/70 00:00 | |
| Baud | 01/01/70 00:00 | |
| RS232? | 01/01/70 00:00 | |
| 100m on 4800 BPS | 01/01/70 00:00 | |
| How? | 01/01/70 00:00 | |
| true RS232 | 01/01/70 00:00 | |
| you do not say how | 01/01/70 00:00 | |
| a) ----- option only | 01/01/70 00:00 | |
| Twisted Pair | 01/01/70 00:00 | |
| He would not be THAT ignorant, I hope | 01/01/70 00:00 | |
| a much better idea | 01/01/70 00:00 | |
| Assumption | 01/01/70 00:00 | |
| a much better idea | 01/01/70 00:00 | |
| WRONG | 01/01/70 00:00 | |
| panacea ---> The Godess of all cure :) | 01/01/70 00:00 | |
| of course, you need to connect gnd | 01/01/70 00:00 | |
| ground problem isnt a problem | 01/01/70 00:00 | |
| Call a spade a spade... | 01/01/70 00:00 | |
| no, it is not | 01/01/70 00:00 | |
| Differential | 01/01/70 00:00 | |
| no, it is not | 01/01/70 00:00 | |
| Oh yes it is! | 01/01/70 00:00 | |
| since you control both ends ... | 01/01/70 00:00 | |
| Minimum RS422/485 | 01/01/70 00:00 | |
| mimum length for 485/422 | 01/01/70 00:00 | |
Thanks for the input to all | 01/01/70 00:00 |