[aprssig] has anyone built/modified a USB to TTL level converter??

[Dave]

On 3 Jun 2011 at 22:50, Stephen H. Smith wrote:

> On 6/2/2011 9:45 AM, John Hansen wrote:
> > That uses the Silicon Labs chip rather than the FTDI chip.  I know
> > there are some people who swear by these, but I've had some trouble
> > with the Silicon Labs drivers.
> >
> > John W2FS
> >
> 
> The Sliicon Labs chip is the one used for the USB interface on the
> Kenwood TH-D72  handheld.   The radio is actually serial internally
> like the previous TH-D7, but converted to USB before it leaves the
> case.   (Rather than  being converted from serial to USB by an
> external serial<-->USB  cable  dongle.)
> 

Just like many USB connected GPS receivers.  Just look at where their 
driver software comes from.   FTDI, Prolific, SiLabs, Sunplus etc...

Dave G0WBX