Hi Bill,
I was going to suggest, depending upon Matts interests, that perhaps
he could use a PIC or ATMEL device with analog inputs and roll his
own.
Most PIC models have 10 bits but some do have 12 bit. You could use
an external A/D for 12 bits or more.
I actually used this for a
Does anyone have a good solution for monitoring 4-8 different voltages
at the same time? I only need a sample rate around 1-2 Hz, but would
need GPIB, serial, or ethernet support with protocol documentation.
Which end of the $$$ scale are you interested in? Are you willing to spend
cash to
Hi Chris,
That is an interesting item and the pricing is certainly on the inexpensive
side. Sparkfun has it for $30. Sure beats trying to make your own boards and
come up with the parts.
I have an old development system from mikroElektronika [
http://www.mikroe.com/
] for the PIC line. They
Hi Matt,
A Hewlet Packard 3421A (Data acquisition unit) with option 20 (10 channel
multiplexer) and GPIB would fit your need withour emptying your wallet.
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Let me quickly plug
http://www.hw-group.com/products/sensors/Sens-UI_en.html
I have found these guys to be cheap and good, when I had
remote Temp monitoring needs.
They have other cool stuff too. Worth a look.
Xtof
Matt Ettus wrote:
DC, 0 to 6V, 10mV or better resolution.
Thanks,
Matt
Like the Arduino/Atmel option..
Try a PIC16F877, 8 10bit A/D inputs, and serial (UART/MSSP) IO too.
(Have to admit, I can't remember if the serial IO will knock out any
of the A/D input pins.)
Prototype boards with RS232 drivers, Power reg, Xtal etc, from Olimex,
among others.
Free software
Very nice!
And at those prices, why bother to roll your own, unless you have some
truly unique need.
Thanks for the tip off.
Dave Baxter.
-Original Message-
Message: 1
Date: Thu, 30 Jul 2009 22:17:24 -0700
From: Tom Van Baak t...@leapsecond.com
Subject: Re: [time-nuts] Multiple
Hello,
Friday, July 31, 2009, 8:00:51, Matt Ettus wrote:
M Does anyone have a good solution for monitoring 4-8 different voltages
M at the same time? I only need a sample rate around 1-2 Hz, but would
M need GPIB, serial, or ethernet support with protocol documentation.
M Any help identifying
Tektronix TM5003 or TM5006 power supply mainframe. DM5010, DM5110, or DM5120
meter. SI5020 input scanner.
In place of the meters/scanner you could use the MI5010 multifunction interface
with the 50M10 A/D card and a 50M40 or 50M41 relay scanner. Even better use an
analog switch on the
I hardly ever respond to posts here, I am just too dumb but.
I have looked into this a bit. Why not look at used Astro-med products
on Ebay. This way you have the display and plotting built into your
solution. You could probably pick up something for under $300 that would
have 8 to 16
Marc Bury wrote:
Hi Matt,
A Hewlet Packard 3421A (Data acquisition unit) with option 20 (10 channel
multiplexer) and GPIB would fit your need withour emptying your wallet.
I can vouch for the 3421A -- nice, inexpensive box that is low power and
fairly painless to program. There are other
The $25 widget from Dataq. 4 channels, 10 bits, serial port
http://www.dataq.com/products/startkit/di194rs.htm
They have others.
I've also used the Eval boards from Maxim or Nat Semi, but these day's they're
usually USB. Sometimes, the protocol isn't published, but is trivially reverse
I would add to this scenario the solution I've used for many years,
the AD12 card shown at about mid page at:
http://www.micromed.it/Elettronica/schede.html
It is a 12 bit + sign, 8 single ended or 4 differential channels,
AD converter with RS232 interface. Resolution is 1 mV, conversion
time
Matt,
Another RS232 DAQ that I've used often in the lab is
model 232SDA12 from BB Electronics. See:
http://www.bb-elec.com/product_family.asp?FamilyId=107TrailType=SubTrail=40
http://www.bb-elec.com/SubCategory.asp?SubCategoryId=40
/tvb
___
Date: Thu, 30 Jul 2009 21:00:51 -0700
From: Matt Ettus boysc...@gmail.com
Subject: [time-nuts] Multiple Voltage monitoring
To: Discussion of precise time and frequency measurement
Does anyone have a good solution for monitoring 4-8 different voltages
at the same time? I only need a sample rate
Date: Thu, 30 Jul 2009 09:42:24 -0700
From: Richard (Rick) Karlquist rich...@karlquist.com
Subject: Re: [time-nuts] Distribution Amp project
To: Discussion of precise time and frequency measurement
time-nuts@febo.com
Message-ID: 4a71cd70.3000...@karlquist.com
Content-Type: text/plain;
Be careful on buying scanners. The issue is not the scanner
but in the fact that they use plug in cards. Make sure you
get the type of interface card(s) you need. There are a lot
of HP/Agilent scanners out there minus all their cards.
Saying that you can anything from a 3421A to a rack size
Before I put these on flea bay, I thought I'd see if there was any
interest here.
These are Stanford Telecom GPS units of some variety I believe: model
5440 coder / data demod and 5430 baseband coder (featuring I/Q input).
I have no other information.
If there's no interest, they go onto da bay.
Marco IK1ODO wrote:
Robert,
Some power tubesmay use it internally.
As far as I know, from many discussions with power tube
manufacturers, no power tube uses beryllia, except for that
conduction-cooled Eimac tubes. It's simply not needed.
Other tubes (not power ones) may be different, but I
Dr. David Kirkby wrote:
Marco IK1ODO wrote:
Robert,
Some power tubesmay use it internally.
As far as I know, from many discussions with power tube manufacturers,
no power tube uses beryllia, except for that conduction-cooled Eimac
tubes. It's simply not needed.
Other tubes (not power
On Thu, Jul 30, 2009 at 10:17 PM, Tom Van Baakt...@leapsecond.com wrote:
Does anyone have a good solution for monitoring 4-8 different voltages
at the same time? I only need a sample rate around 1-2 Hz, but would
need GPIB, serial, or ethernet support with protocol documentation.
Any help
I'm looking at an HP 3458A that boots up with a failure -- message is
OVLD. Running the self test the first time returned the following:
ERRSTR 209, HARDWARE FAILURE -- INTERNAL OVERLOAD: 72
I turned it off, waited a bit, turned it back on and got:
ERRSTR 202, HARDWARE FAILURE -- SLAVE TEST:
Folks;
Writing as someone in the US, I keep seeing interesting available
electronic components coming out of Russia, the Ukraine, etc. on
eBay. I rather suspect there are a lot more types available than what
I see there.
Can anyone recommend any web sites where there might be spec
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