| ??? 05/09/07 12:44 Read: times |
#138889 - sure, but Responding to: ???'s previous message |
I thought so, but I've just read this:
Would you trust a resistive pull-up bus for distances use? YES 30 ohms (the cc impedance) does make it possible, but I would/will always go differential if distance beyond a few meters is involved. Now one comment on this: if the choice is between the high impedance std IIC/Dallas 1 wire/buffered IIC the choice is clear. I can see the buffered IIC used in some slow data collection systems (e.g. temp sampling of freezers in a warehouse) where 'adding one is a matter of 'hooking onto the bus', however, I, personally would still use differential. Erik |
| Topic | Author | Date |
| COTS Pushbutton with I2C Connection? | 01/01/70 00:00 | |
| Something like this, perhaps ? | 01/01/70 00:00 | |
| No - not COTS | 01/01/70 00:00 | |
| can you point us to an equivalent... | 01/01/70 00:00 | |
| subassembly | 01/01/70 00:00 | |
| SMbus...? | 01/01/70 00:00 | |
| why not make? | 01/01/70 00:00 | |
| because | 01/01/70 00:00 | |
| OK but I still don't know... | 01/01/70 00:00 | |
| Outside the box | 01/01/70 00:00 | |
| sure, but | 01/01/70 00:00 | |
| Qprox devices | 01/01/70 00:00 | |
| Again - not COTS | 01/01/70 00:00 | |
| Look at these possibilities... | 01/01/70 00:00 | |
| That's the kind of thing - any other suggestions? | 01/01/70 00:00 | |
| 2 3 & 4 | 01/01/70 00:00 | |
| I don't think this is what Andy wants... | 01/01/70 00:00 | |
| Oh well..... | 01/01/70 00:00 | |
| Well,... | 01/01/70 00:00 | |
| just remembered | 01/01/70 00:00 | |
A bit like QPROX | 01/01/70 00:00 |