For a simple 1 wire O2 sensor I use an LM317 DC voltage regulator for 0vdc - 1vdc. http://www.national.com/mpf/LM/LM317.html#Overview

Here is mine. I just plug everything in and spin the distributor with a hand drill. I use a hand vacuum pump on the Map Sensor, a heat gun on the temp sensor, and data log with the aldl connector. ...