| ??? 04/13/07 07:54 Read: times |
#137124 - You must be doing it wrong! Responding to: ???'s previous message |
I said:
I used just the normal Open-Drain output of an LPC932 to do about 20m - driving some flashing lights on the "Christmas Tree" at the end of our garden...
http://www.8052.com/forumchat/read.phtml?id=137123 And that was just using ordinary 3A mains flex - not even twisted pair! But it was 3 wires - not "Parasite" power. Russell Bull said:
My first problem was the week pulldown of the micro I was using, this was solved by using a Maxim/Dallas i2c->1wire chip (expensive). Couldn't you just have used the simple, single-FET interface shown in the App Notes? That works fine - and has also done the "Christmas Tree" in previous years! |
| Topic | Author | Date |
| dallas one wire : working range ? | 01/01/70 00:00 | |
| Nothing exact, but | 01/01/70 00:00 | |
| a rough translation from our local hw mailing list | 01/01/70 00:00 | |
| they quote 750 meters | 01/01/70 00:00 | |
| EMI | 01/01/70 00:00 | |
| Head end ? | 01/01/70 00:00 | |
| App Notes | 01/01/70 00:00 | |
| Specifically | 01/01/70 00:00 | |
| I had trouble with <3m! | 01/01/70 00:00 | |
| You must be doing it wrong! | 01/01/70 00:00 | |
| 1-wire Christmas tree? | 01/01/70 00:00 | |
| About the 1-wire Christmas tree... | 01/01/70 00:00 | |
| how fast? | 01/01/70 00:00 | |
| ZTX | 01/01/70 00:00 | |
| Funny you should say that... | 01/01/70 00:00 | |
| Relics | 01/01/70 00:00 | |
I've got some OC71s somewhere, too...! | 01/01/70 00:00 | |
| Tried the fet interface... | 01/01/70 00:00 |