I need to make Data acquisition trough USB

[Marmelada]

I need to make Data acquisition trough USB for educational electronic kits (basic electronic harware cases for study) for the Labview.

Also need to program a basic controller for basic stduy operation.

What is the most affordable way to do it ?

Thanks for helping me.

[smercurio_fc]

Your question should be rephrased. You should be asking "what is the most affordable way to do it using NI products". It is well known that there are cheaper USB-based DAQ devices out there, and some have used them. However you will be relying on their software and drivers to use them. With NI products you get DAQmx which is a very simple way to perform data acquisition. As far as products are concerned, have you looked through the catalog (http://www.ni.com/dataacquisition/usb/)? You have not provided any kind of data acquisition requirements, such as number and type of channels, type of sensors, required reading rate, etc. so it's impossible to tell you which one to use. You could start with teh $99 USB-6501. I think your best bet is to call NI. Their app engineers are quite good at selecting what you need.

[SnowMule]

The 6501's just a digital I/O module; no analog inputs or outputs.

The 6008's probably the cheapest multifunction I/O board available that interfaces nicely with LabVIEW.  They're under $200. 

[Marmelada]

Thanks !

It's quite problematic situation for me, since w intend to develop a basic analog kits which student will be able to monitor  2 - 4 analog parameters in each basic circuit and we can not afford more than 50 USD for each educational kit (not included the software ).

[Timmar]

I am with Snowmule with this one, 6008.

It won't achieve your target of under $50 bucks though.

Consider how many you need to have and the costs associated with your time.

There are several usb "Stamp's" out there, I haven't looked too hard, some examples below.

yur best candidate:

http://picshop.nl/ami18_stamp.html

others

http://www.lennard.net.nz/electronics/usb.html#usbonastamp

picaxe have a range of stuff

http://www.rev-ed.co.uk/docs/AXE110.pdf

If you are trying to get students do develop code for both ends, this style of device is good.

If you are looking for a reliable solution, 6008's are good with the caviet that it is pretty easy to "let the smoke out" of the some of the components if left in the hands of amatures. (keep away from >10V)

[RTSLVU]

It's still out of your budget but consider Measurement Computing's USB-1208

8 12bit analog inputs

16 digital I/O, counters/timers

Up to 4 analog outputs

1.2 kS/s to 1 MS/s sampling

Full featured LabView libraries

$129