Lowest price USB 2.0 full speed DAQ for $49 or up

H

HYTEK

Guest
Dear all,

Some of you may be interested in USB data acquisition module. I
want to announce that we have just released a very affordable USB 2.0
full speed multi-functions DAQ ($49 or up). Below is an overview of our

iUSBDAQ - U120816:
------------------------------­­----------------
USB 2.0/1.1 Full Speed Interface
USB Bus Powered
8 Single-Ended, 12-Bit Analog Inputs
0-4.096 V Analog Input Range
Up to 32 kSamples/Sec Throughput with Single Channel Up to
13kSamples/Second for Streaming Mode
Supports Both Scan Mode and Continuous Streaming Mode Data
Acquisition
One Dedicated Trigger Line for Streaming Mode Data Acquisition
Two 10-bit PWM Outputs (3kHz- 333kHz)
16 Bi-Directional Digital I/O Lines (125HZ update rate)
One 16-Bit Counter
240 bytes EEPROM Reserved for User Data
Multiple iUSBDAQs Can Be Connected On Same Computer
Simultaneous Streaming from Multiple iUSBDAQs Possible
Works with Windows 98SE, ME, 2000, or XP
FREE USB Cable
FREE Screwdriver
FREE Device Driver, Programming API (DLL), LabVIEW Drivers, Examples



FREE Standalone Ready-to-Run iDAQTest&Log Software for Testing,
Data Logging, Data Playback and Simple Analysis
30 Days Money Back Guarantee, 6 Month Warranty and Trade In Policy
Approximately 3.5" x 3.375" x 1.125" (9cm x 8.5cm x 3cm)
Industrial Temperature Range
------------------------------­------------------------------­------

More details please check this link:
http://www.hytekautomation.com/Products/IUSBDAQ.html


Thank you for your attention.
Regards,
Irene He
 
Your creditibility would be greater if you honestly represented the
true cost of a single unit...$79....instead of how you misrepresented
it as $49.

Yeah I know, everyone does it.

Well it still doesn't make it right and misleading prospective buyers
diverts attention from what I would assume to be a good product.

TMT
 
Too_Many_Tools wrote...
Your creditibility would be greater if you honestly represented the
true cost of a single unit...$79....instead of how you misrepresented
it as $49.

Yeah I know, everyone does it.

Well it still doesn't make it right and misleading prospective buyers
diverts attention from what I would assume to be a good product.
Click to expand...
Yes. Plus, 32k Samples/Sec is hardly "full speed" is it? Shame.


--
Thanks,
- Win
 
Hello Winfield,

Yes. Plus, 32k Samples/Sec is hardly "full speed" is it? Shame.
Click to expand...
Even a sound card is faster than that. Ok, no DC but with some clamping
tricks that should be possible too.

Regards, Joerg

http://www.analogconsultants.com
 
Joerg wrote:
Hello Winfield,

Yes. Plus, 32k Samples/Sec is hardly "full speed" is it? Shame.

Even a sound card is faster than that. Ok, no DC but with some clamping
tricks that should be possible too.

Regards, Joerg

http://www.analogconsultants.com
Click to expand...
Ok, guys, I understand that all of you are circuit design experts. But
I still just want to clear up some confusion here.
The communication for USB sound card or USB video card is different
from data acquisition card. The sound or video can tolerant quality
lose, data lose as long as the delivery is on time. But data acquistion
can not tolerant data lose nor time delay for continuous streaming, so
most time it can not use isochronous transfer like for sound card or
video card, but interrupt transfer in USB. Adding some other factors in
microcontroller and ADC, most full speed USB data acquisition module in
the market ends up working in the range up to 50ksamples/S (by the way,
one sample can be two or three bytes depends on resolution).

I welcome your comments here, so that we can learn from each other.

Regards,
Irene He
 
Hello Irene,

The communication for USB sound card or USB video card is different
from data acquisition card. The sound or video can tolerant quality
lose, data lose as long as the delivery is on time. ...
Click to expand...
Not really. Audio experts demand a lot from their cards and there are
some fine 24bit cards that run almost 50ks/sec, for each channel. Even
the cheap Analog Devices converter in our lab computer does a fine job.
Else it would not be possible to do proper FFT with it which is the only
task we are using it for.

... Adding some other factors in
microcontroller and ADC, most full speed USB data acquisition module in
the market ends up working in the range up to 50ksamples/S (by the way,
one sample can be two or three bytes depends on resolution).
Click to expand...
Then check this one out:
http://oceanoptics.com/products/adc1000usb.asp

I welcome your comments here, so that we can learn from each other.
Click to expand...
Two things that increase your credibility: Don't quote the 100+ qty
price but the single unit price. Otherwise people can become
disappointed and never look again. Also, please add "FS:" (for sale) or
something similar in front of the subject line. It's the proper
etiquette around here.

Anyway, one thing that might be a real hit: A cheap HPIB to USB
converter. Ideally it should fit into an HPIB connector so the cable is
small and flexible. There isn't much out there yet and it shouldn't be
rocket science. The same goes for RS232-USB converters which are
generally too expensive but there may be less profit in that market.

Regards, Joerg

http://www.analogconsultants.com
 
Joerg wrote...
Irene wrote,

The communication for USB sound card or USB video card is different
from data acquisition card. The sound or video can tolerant quality
lose, data lose as long as the delivery is on time. ...

Not really. Audio experts demand a lot from their cards and there are
some fine 24bit cards that run almost 50ks/sec, for each channel.
Click to expand...
I'm using a 24-bit stereo A-D that goes up to 200kHz per channel, two
channels, 32 bit words each. The USB driver is configured to 96kHz,
and keeps up just fine. In fact we can run several of them at once.


--
Thanks,
- Win
 
"Joerg" <notthisjoergsch@removethispacbell.net> schreef in bericht
news:EYuLe.11629$O07.4497@newssvr23.news.prodigy.net...

Then check this one out:
http://oceanoptics.com/products/adc1000usb.asp
Click to expand...
Isn't that comparing apples and pears? Looks like the data
is transferred in bursts (300ms when hooked up to the serial port).
USB1.0 is not that fast.

Anyway, one thing that might be a real hit: A cheap HPIB to USB
converter. Ideally it should fit into an HPIB connector so the cable is
small and flexible. There isn't much out there yet and it shouldn't be
rocket science. The same goes for RS232-USB converters which are
generally too expensive but there may be less profit in that market.
Click to expand...
RS232-USB converters can be bought for $5. Or 24 cents on Ebay.

That USB box didn't look too bad. A nice bunch of I/O, for only $49 ;)

--
Thanks, Frank.
(remove 'q' and '.invalid' when replying by email)
 
Hi Joerg,
Thanks for your reply and discussion.
I took a look at the link you gave:
http://oceanoptics.com/products/adc1000usb.asp

It does not seem that they can really do 1MHZ real time streaming,
continuously (this must be pretty hard with full speed USB interface).
They may store data into memory at this high sampling rate, then use
USB or RS232 to transfer the data at a later point, this will limit the
number of bytes that acquired at one time. And of course, if you want
to pay a lot more, you can always get high end product. (adc1000usb is
$599 on their website)

Anyway, I think we may look at the different industry area (I may post
on the wrong group. sorry guys). From the industry area that I'm
familiar with, people need data acquisition module, not sound card for
PC based test and measurement application. And our goal is to make a
low cost module for low budget project and academic project.

Thanks for your advise on the price ad, I did put "or up". Yes,
sometime I don't like this way either, but seems everybody doing this
now a day that you can't not to match them up :)

Irene He
www.hytekautomation.com
 
Hello Irene,

It does not seem that they can really do 1MHZ real time streaming,
continuously (this must be pretty hard with full speed USB interface).
They may store data into memory at this high sampling rate, then use
USB or RS232 to transfer the data at a later point, this will limit the
number of bytes that acquired at one time. And of course, if you want
to pay a lot more, you can always get high end product. (adc1000usb is
$599 on their website)
Click to expand...
Yes, you may need USB2 for high throughput. It is possible. I have seen
a video input adapter that had to be above 3Ms/sec since you wouldn't
get a decent picture quality if it wasn't. I do not remember the price
but it was in a consumer store (where the computer freak go...) and well
below $100. But this is usually 8bits or less.

Anyway, I think we may look at the different industry area (I may post
on the wrong group. sorry guys). From the industry area that I'm
familiar with, people need data acquisition module, not sound card for
PC based test and measurement application. And our goal is to make a
low cost module for low budget project and academic project.
Click to expand...
I think it was the right group.

Thanks for your advise on the price ad, I did put "or up". Yes,
sometime I don't like this way either, but seems everybody doing this
now a day that you can't not to match them up :)
Click to expand...
Well, not doing it can also have its rewards. Honesty is still highly
regarded. Especially in the US people are pretty sick of "teaser ads".
Like the ones where our local cable company offers wideband Internet for
"just $19.95". In the fine print that I could barely read there was the
catch. You also had to buy their TV package at a much higher price or
this Internet access would cost much more than regular DSL. So I never
looked again at their ads.

Regards, Joerg

http://www.analogconsultants.com
 
Hello Frank,

Isn't that comparing apples and pears? Looks like the data
is transferred in bursts (300ms when hooked up to the serial port).
USB1.0 is not that fast.
Click to expand...
Yes, you need USB2 for real speed.

RS232-USB converters can be bought for $5. ...
Click to expand...
Where?

That USB box didn't look too bad. A nice bunch of I/O, for only $49 ;)
Click to expand...
That is if you buy 100 of them, else it's $79. Pretty comparable to the
Labjack.

Regards, Joerg

http://www.analogconsultants.com
 
Hello Winfield,

I'm using a 24-bit stereo A-D that goes up to 200kHz per channel, two
channels, 32 bit words each. The USB driver is configured to 96kHz,
and keeps up just fine. In fact we can run several of them at once.
Click to expand...
Do you think it would be fairly easy to modify them so that they go down
to DC?

Regards, Joerg

http://www.analogconsultants.com
 
"Joerg" <notthisjoergsch@removethispacbell.net> schreef in bericht
news:0RvLe.12489$O07.6656@newssvr23.news.prodigy.net...
Hello Frank,

Isn't that comparing apples and pears? Looks like the data
is transferred in bursts (300ms when hooked up to the serial port).
USB1.0 is not that fast.

Yes, you need USB2 for real speed.

RS232-USB converters can be bought for $5. ...

Where?
Click to expand...
Ebay, of course.

--
Thanks, Frank.
(remove 'q' and '.invalid' when replying by email)
 
Hello Irene,

Labjack is only 1.2ksamples/s, it's low speed.
Click to expand...
True, when you need streaming it's slow. I wonder when they will upgrade
that since its bigger brother already offers 50ks/sec streaming but it
is very expensive.

Regards, Joerg

http://www.analogconsultants.com
 
Hello Frank,

RS232-USB converters can be bought for $5. ...

Where?

Ebay, of course.
Click to expand...
I know. If you are lucky. But what counts is the price at a regular
business where you can buy as many as you want and for many years.

Regards, Joerg

http://www.analogconsultants.com
 
Joerg wrote...
Hello Winfield,

I'm using a 24-bit stereo A-D that goes up to 200kHz per channel, two
channels, 32 bit words each. The USB driver is configured to 96kHz,
and keeps up just fine. In fact we can run several of them at once.

Do you think it would be fairly easy to modify them so that they go
down to DC?
Click to expand...
It does DC now.


--
Thanks,
- Win
 
HYTEK wrote...
Labjack is only 1.2ksamples/s, it's low speed.
Irene
Click to expand...
I still object to your calling 32kS/s "full speed"


--
Thanks,
- Win
 
On 14 Aug 2005 04:56:03 -0700, Winfield Hill <Winfield_member@newsguy.com> wrote:

Joerg wrote...

Hello Winfield,

I'm using a 24-bit stereo A-D that goes up to 200kHz per channel, two
channels, 32 bit words each. The USB driver is configured to 96kHz,
and keeps up just fine. In fact we can run several of them at once.

Do you think it would be fairly easy to modify them so that they go
down to DC?

It does DC now.
Audio AD/DA converters are not typically optimised (or sometimes even characterised) for DC
Click to expand...
performance - things like offset drift may be very much poorer than 24 bit performance - you should
read the datasheet carefully if DC matters to you.
 
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