12V Time/Date Stamp Device

Tckephart,

You are describing a simple digital input data logger. By storing the time and date the circuit is turned on and off, do you meant internally, for later retrieval, or "online" and the receiving device (computer) stores the information?

There are a number of ways this switch closure can be detected by a computer, but it sounds as though you are looking to buy rather than build.

One link that has a wide variety of devices, all of which far surpass reading one switched (digital) input for a low as $24.95, (as a complete ready to use starter kit), but without internal storage. Many of their devices have internal storage, but also are overkill in the other features. In any case, here is the link:

http://www.dataq.com/

Regards, Greg

Greg,

Thanks for the help. I should have been a little clearer in my description. I need a device which is standalone and will save the data for later retrieval. The starter kit you described is what I am looking for except with stand alone capabilities.

still not quite stand alone, runs for a year on a couple of AA batteries

Onset Computer Corporation -- The HOBO Data Logger Company

http://onsetcomp.com/