Ideas needed for something to record voltage/current levels for hours

[eh2mc]

Hi, I'm new here so forgive me if this is in the wrong sub-forum.

I'm looking to read a voltage or current and log the readings in a computer for minutes/hours/up to a day. I will need ~4 input channels. For example, I could buy an National Instruments card and code some stuff in Labview, however I do not want to do this because NI cards are quite expensive.

Does anyone have any reasonable ideas on how to do this? (Maybe buy a cheap USB scope or something? Or just somehow read voltages via USB?) My budget is ~$100.

Thanks!

 

[crutschow]

A google search for "USB data logger"s turned up many results. Here's one that may work for you, depending upon the frequency of the signals.

 

[Reloadron]

You don't mention the voltage or current levels, however, for a simple 4 channel unit real easy to use there is one of these, or if you want a higher accuracy then consider one of these. I use the latter quite a bit for basic apps. They are both 0 to 10 volt input so as to signal conditioning you are on your own. The first is a cheap USB interface 10 bit unit and the latter a better 12 bit unit. Both offer differential inputs which is nice. The recording software is also nice.

Ron