Hello Patryk, thanks for responding! > I don't know if safely but in my case it all works also without diodes all > on 5V. I tested without those diodes on my two laptops and nothing was > damaged :) > It's also mentioned on i2c-tiny-usb page that You can omit the diodes and > according to USB specs nothing should happen.
It may and may not work on different motherboards. AMD is known to be 5V tolerant, but my laptop core2 based and it is not. >> And some random thoughts, also: >> >> 1) I was told on some forum (it is in Russian, so links are useless >> here), that DS2482-800 doesn't proceed 1-wire lines in parallel. If >> so, I guess multiple (we can have up to 4) DS2482-100 will be much >> better > > I have found a comparison of 1-wire masters. The short version is that the > most powerful one is DS2480B > the i2c ones are weaker. But on the other hand with -800 you get a switch > so it's better with star topology. > http://www.maxim-ic.com/app-notes/index.mvp/id/4206 Ok, if DS2480B is the best, why not using some virtual USB-UART adapters like FT231X from FTDI? As a downside it gives you only one 1-wire line. They say that i2c can drive "not as many" as UART, but how many? Now I have 10 devices, is it many or not? > I have my test board done. I just need to print it on a laser printer. > It has place for all 3 i2c masters and you can disconnect each one with a > jumper. Atmega8 has also a header to future experiments. Thanks for sharing, I'm going to make PCB also this or next week. >> 2) If one can combine existing 1-wire master code for AVR (STM?) MCs >> with existing usb code, we can obtain a "dream device", a native usb >> 1-wire master in one cheap IC! > > I saw some guy mad a 1-wire master and posted on Polish forum elektroda.pl > http://www.elektroda.pl/rtvforum/topic1524421.html > It said to run on Linux with digitemp. Thanks for the link, as I can read some Polish (spent two months in Poznan last year) it twice better ;) Good luck! ------------------------------------------------------------------------------ Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ _______________________________________________ Owfs-developers mailing list Owfs-developers@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/owfs-developers
