2012-04-04 12:02 keltezéssel, Patryk írta: > You must know that there are two types of serial ports. One is with > TTL level voltage which use 0V and 5V or 0V and 3.3V. This is used in > wireless routers and some single board computers. Another standard is > used in PC's and have voltage levels -12V nad +12V (or -5V +5V) AFAIK > DS9097 will work only with -+ voltages. OK, now I see, why it doesn't work. The thing what I don't understand is, if these are two different standards, how can I log in my router from the PC through a nullmodem cable without any active converter? The one side is a +-12V type, the other is a 5V.
> If you have basic soldering skills You can build Your own master It is the preferrable solution for me :-) > with MAX232 and DS2480B. MAX232 can be bought in almost every > electronics shop and Maxim/Dallas sends DS2480B samples for free. > MAX232 is for voltage level conversion because DS2480B accepts TTL > levels. So, I've found a lot of different type MAX232. (CPE, D, DW etc.) I found a version (MAX232N) that is in DIL, and I can solder it easyer then the SMD versions. Are they equally? Is the only difference that the one is in SMD the other is DIL? Is this adapter I can build from these parts, will work with the boards with the low-power type RS232? Do you think is it a good schematics: http://vesta.homelinux.free.fr/site/wiki/bus_1_wire.html#Interface_active_DS9097U or can you offer a better schematics for me? ------------------------------------------------------------------------------ Better than sec? Nothing is better than sec when it comes to monitoring Big Data applications. Try Boundary one-second resolution app monitoring today. Free. http://p.sf.net/sfu/Boundary-dev2dev _______________________________________________ Owfs-developers mailing list Owfs-developers@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/owfs-developers
