Ok, I would like to share a schematic, but I have to go to the cottage. ( Sorry I was not responding to quickly because my modem just "quit" , it "stuck" my telephone line . ) I will try to get some schematics on Monday - late afternoon after I am back from the cottage.
Anyway here a few link : http://www.play-hookey.com
about op-amps and a few things, check http://www.falstad.com/
, it got a circuit simulator, http://www.electronics-tutorials.ws/
, Some eclectronics tuturails, http://www.doctronics.co.uk/beastie_zone.htm
, more to check out. And http://www.kpsec.freeuk.com/study.htm
Anyway, check out those sites, experiments with your sensor. Hope you have a breadboard, a few parts, maybe a scope, but at least a DMV- Digital Multi Meter. I just bought for under $40 at Canadian Tire - Electrical Section. The have a few cheap one in the Automotive Section ( between $25 to $35 )
Sorry that you have a lot to read. That learning is all about