Re: 1-wire to USB converter that can use 1820s directly

["Rod Speed" <rod.speed.aaa@xxxxxxxxx>]

Dave Houston <nobody@xxxxxxxxxxxx> wrote:
> "Rod Speed" <rod.speed.aaa@xxxxxxxxx> wrote:
>
>> Dave Houston <nobody@xxxxxxxxxxxx> wrote
>>
>>> The Elektor schematic I found shows it to be self-powered.
>>> Is that correct?
>>
>> Powered from the USB, yes.
>
> I misinterpreted the schematic, thinking the +5V balloon at the top
> indicated an external supply. On a closer look, I see it's just a
> label.
>
> http://www.bairesrobotics.com.ar/elektor/06-2002%20USB%20Interface%20for%20the%20I-Wire%20Bus.pdf
>
>>> It appears to use the same Maxim drivers linked
>>> in the DS9490R datasheet. Is this an HID driver?
>>
>> Not clear to me what a HID driver is. It definitely uses java.
>
> Right after posting that I had an "Aha!" moment, realizing that if it
> were an HID device, it would not need external drivers.
>
>>> Why don't you like serial for this?
>>
>> Basically because I dont have enough serial ports available,
>> the only one available is used for the X10 controller,
>> and USB/serial converters are too much of a kludge.

> If you have a free PCI slot, it's easy and relatively inexpensive
> to add oodles of serial ports. I have an 8-port ByteRunner
> card in one PC and a 4-port card in another.

Sure, but its much cleaner using USB.

> If I were to design something to do 1-wire, I'd use a PIC to handle
> the 1-wire network with a $5 Silicon Labs CP2102 USB-serial chip
> on the PIC end. It communicates over the USB bus but is seen as
> a virtual serial port on the PC end. It's much slower than USB but
> fast enough for this type of data acquisition.

Sure, but if a basic USB/1-wire converter/adapter will work, its even
easier.