[time-nuts] USB - was RS 232

[Chris Albertson]

There are a bunch of little boards like these.  This one has USB-B socket
that faces your computers and TTL Serial that faces your project.   When
you plug your project into a computer the computer sees it as a serial port.
https://www.sparkfun.com/products/718

If all you need is the USB-B connector then you can get free samples here
http://www.molex.com/molex/products/datasheet.jsp?part=active/0548190519_IO_CONNECTORS.xml&channel=Products&Lang=en-US

If you don't like "free" the above place, Sparkfun" will sell them for $1.50



On Thu, Jul 25, 2013 at 2:45 PM, Bob Stewart <bob at evoria.net> wrote:

> Do you have a good solution for USB?  Not just a cable with an adapter and
> wires hanging out of it, but a clean solution.  I had trouble finding USB
> B-type female chassis-mount connectors and wound up ordering one from some
> guy in the UK.  It's actually an extender cable that can be chassis
> mounted, and I'll just strip the wires to hook it to a USB-TTL converter
> inside my GPSDO.  But I'd like to know about something turnkey for the
> future.
>
>
> Bob - AE6RV
>
>
>
>
> >________________________________
> > From: Tim Shoppa <tshoppa at gmail.com>
> >To: Discussion of precise time and frequency measurement <
> time-nuts at febo.com>
> >Sent: Thursday, July 25, 2013 10:58 AM
> >Subject: Re: [time-nuts] RS 232
> >
> >
> >A lot of these questions can be side-stepped today because few to no
> modern
> >PC's have built in RS-232 serial ports.
> >
> >And if you are going to add a serial port you can just put in a RS-422 PCI
> >card or RS-422 to USB interface instead. A big win, and it makes much more
> >sense to leach +5V off of USB than it does to leach power off RS-232
> >control lines.
> >
> >Many time-nut devices are already RS-422 (e.g. Z3801A) serial and
> >differential for PPS, and it makes little sense today to backhaul to
> RS-232
> >when a new PC won't have native RS-232 support anyway.
> >
> >Tim N3QE
> >
> >
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-- 

Chris Albertson
Redondo Beach, California