On 12/19/2010 05:13 AM, Bob Camp wrote:
Hi
In the case of a $200 5370, you have to wait a while to find one. When you get
it, you likely have to do some work to get it running. At the very least you
will need to do a cal.
My guess is that a counter project would be very similar. There is an
On 12/19/2010 05:44 AM, Chris Albertson wrote:
This is a marine navigation unit sold under West Marine's own brand
name.It looks modern and automated. Has functions on it like
anchor drift alarm Where you fix your location then set a radius
and if the unit moves outside the radius it beeps
On 12/19/2010 09:57 AM, Poul-Henning Kamp wrote:
In message28e8c13c-3227-4cd6-bbea-902f03c81...@gmail.com, bownes writes:
One of the big problems with PC-instruments is isolation: most of them
havn't any.
If you are going to design one such, remember to isolate the USB
port galvanically from
Hello
El 19/12/2010 11:13, Magnus Danielson escribió:
To achieve meaningful isolation, it should be optical. Transformer
isolation has a few issues to get right...
What about digital isolators, lile ISO7220, ADuM1200 and so?
Regards,
Javier
--
On 12/19/2010 11:47 AM, Javier Herrero wrote:
Hello
El 19/12/2010 11:13, Magnus Danielson escribió:
To achieve meaningful isolation, it should be optical. Transformer
isolation has a few issues to get right...
What about digital isolators, lile ISO7220, ADuM1200 and so?
Need to look at
El 19/12/2010 12:34, Magnus Danielson escribió:
Need to look at it. But essentially, during normal operation common
mode isolation isn't all that hard. The problem is that during failure
mode can what should be a common mode voltage and current become
diffrential mode, which jumps straight
Canada took theirs down in August, 2010.
J. L. Trantham wrote:
The Canadian LORAN chains were operating after the US shut theirs down.
When I was flying my plane north of North Carolina, I could pick up the
Canadian chains and my old Northstar M2 LORAN/GPS would be fully functional.
However,
Magnus Danielson wrote:
On 12/19/2010 05:13 AM, Bob Camp wrote:
Hi
In the case of a $200 5370, you have to wait a while to find one. When
you get it, you likely have to do some work to get it running. At the
very least you will need to do a cal.
My guess is that a counter project would be
LORAN -A,C are all dead in north america.
I think you have a boat anchor. Pun intended.
The LORAN As never had a keypad because they were analog.
As I recall they also used a twinax connector.
I dealt with a LORAN A on the NAVY ships in 1973, transitioned to OMEGA
(Long dead) and the LORAN C
Did look for LORAN C chains last night simple dumb setup.
HP 3586 to 80 meter vertical and pretty good ground plane.
Heard not a thing from Boston even at -120 db. (I did hear general crud)
Do wonder with all of these little cpfl lights and their nasty switchers if
the noise floors is up.
Will try
Gerhard Hoffmann wrote:
Am 19.12.2010 05:52, schrieb Bob Camp:
The real thing you would learn about is writing code that runs an FPGA.
Yes. A good starting point would be a Xilinx SP605 kit.
It's about the $750 for a decent 5370 and includes
many points from Bobs option list.
The other
Bob Camp wrote:
Hi
Which is why a simple / cheap opto isolated RS-232 connected to a USB dongle
makes a lot of sense.
Bob
There are some nice solutions, though, using USB directly, which has the
advantage of providing a few watts of power. Isolated DC/DC converters
are readily
In message 4d0e3080.1060...@earthlink.net, jimlux writes:
Bob Camp wrote:
There are some nice solutions, though, using USB directly, which has the
advantage of providing a few watts of power. Isolated DC/DC converters
are readily available. you might be able to do transformer isolation of
There ain't no such thing as Loran. It's LORAN, just like RADAR.
They are BOTH acronyms.
-John
=
There never was a Loran receiver with a keypad. I am certain he meant
Loran C. Loran is (was) the common name for the service... But then,
you already knew that, and were just
Yes. It can if done wrong.
The correct way to use USB is to make your USB device class
compliant for some class. Then most OSes (and with recent releases
even MS Windows) will have built-in drivers for each class of USB
device. Never buy or design a USB device that requires the user to
instal
Hi
My bag full of useless adapters were indeed class compliant back in the day.
Not so any more under the new approach to signed drivers.
Bob
On Dec 19, 2010, at 3:09 PM, Chris Albertson wrote:
Yes. It can if done wrong.
The correct way to use USB is to make your USB device class
That's kinda my point about using rs232. Serial to USB, serial to Ethernet
adaptors will be available for a good long while.
Also why I like the idea of a standalone instrument that also has a pc
interface of some sort. Or a slot for a pc interface of whatever source I
want.
So how does
On Sun, Dec 19, 2010 at 12:45 PM, Bob Camp li...@rtty.us wrote:
Hi
My bag full of useless adapters were indeed class compliant back in the
day. Not so any more under the new approach to signed drivers.
Bob
On Dec 19, 2010, at 3:09 PM, Chris Albertson wrote:
Yes. It can if done wrong.
On Sun, Dec 19, 2010 at 12:45 PM, Bob Camp li...@rtty.us wrote:
Hi
My bag full of useless adapters were indeed class compliant back in the
day. Not so any more under the new approach to signed drivers.
If they were Class Compliant they do not need drivers.
=
Chris Albertson
Redondo
From: Chris Albertson albertson.ch...@gmail.com
Yes. It can if done wrong.
The correct way to use USB is to make your USB device class
compliant for some class. Then most OSes (and with recent releases
even MS Windows) will have built-in drivers for each class of USB
device. Never buy
A much simpler solution is to dedicate a $20 obsolete laptop to the Tbolt. I
use a 200 MHz Compaq Armada with 1024x768 screen. I have also run Heather on a
90 MHz Fujitsu Milan with a 640x480 passive matrix screen.
For bonus points, tap off the internal laptop CDROM power connections (and
Ho Ho Ho,
Tis the season once again for giving and I wrote this up to give some
suggestions to the discussion. The PICTIC II was a spin-off of a GPSDO
front end designed specifically for low cost, low parts count, amateur
construction, and 1ns resolution to equal the performance of a modern
GPS
Mark,
You might look at this hardware:
http://www.bestbuy.com/site/Insignia%26%23153%3B+-+Infocast+3.5%22+Internet+Media+Display/1152881.p?skuId=1152881ci_src=14110944ci_sku=1152881ref=06cmp=RMXloc=01id=1218226456157
It is based on the Chumby One design and Best Buy has had it on sale
for $50
One more link that shows the teardown of a Chumby One:
http://www.ifixit.com/Teardown/chumby-one-Teardown/1614/1
As I mentioned, the Insignia circuit board is slightly different. The
overall configuration of the unit is very similar. The Insignia is
actually easier to open than the Chumby.
Joe
On Sun, December 19, 2010 3:36 pm, Bob Camp wrote:
My bag full of useless adapters were indeed class compliant back in the
day. Not so any more under the new approach to signed drivers.
The problem with USB-RS232 adapters is that there is no class compliant
device, because there is no USB class
From: Mark Sims:
A much simpler solution is to dedicate a $20 obsolete laptop to the
Tbolt. I use a 200 MHz Compaq Armada with 1024x768 screen. I have also run
Heather on a 90 MHz Fujitsu Milan with a 640x480 passive matrix screen.
For bonus points, tap off the internal laptop CDROM power
From: Chris Caudle
The problem with USB-RS232 adapters is that there is no class compliant
device, because there is no USB class for RS232 emulators. Doesn't exist,
so every device you've ever seen or used is a custom USB device. The
drivers for the FTDI devices ship with modern variants
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