[time-nuts] USB - was RS 232

Bob Stewart bob at evoria.net
Thu Jul 25 18:39:08 EDT 2013


I'm looking for something more like this auction, but with a USB-TTL adapter on the back of the panel mount socket.  When I was searching the only one of these I found was in the UK.

http://www.ebay.com/itm/L-Com-Panel-Mount-USB-Cable-Type-B-Female-Panel-Mount-to-Type-B-Male-Connector-/310393118679?pt=LH_DefaultDomain_0&hash=item4844df1fd7





>________________________________
> From: Chris Albertson <albertson.chris at gmail.com>
>To: Bob Stewart <bob at evoria.net>; Discussion of precise time and frequency measurement <time-nuts at febo.com> 
>Sent: Thursday, July 25, 2013 5:09 PM
>Subject: Re: [time-nuts] USB - was RS 232
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>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
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>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
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>If you don't like "free" the above place, Sparkfun" will sell them for $1.50
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>On Thu, Jul 25, 2013 at 2:45 PM, Bob Stewart <bob at evoria.net> wrote:
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>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.
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>>Bob - AE6RV
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>>>________________________________
>>> 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 
>
>


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