Here is a picture of the faceplate that holds the LED bargraphs for air/fuel and pulse width as well as the pot to control the fuel mixture above 7psi boost.
http://www.ggimages.com/rx7/pwm.html
Measures car water temperature to 1 degree resolution.
http://home.maine.rr.com/randylinscott/apr99.htm
Simple Circuits for an Engine Control Unit or ECU
http://www.5bears.com/circuits.htm
An introduction to the Wideband Fuel Mixture Display (FMD). This document describes how the 5300/5301 display works with the DIY-WB unit.
http://www.techedge.com.au/vehicle/wbo2/wbfmd.htm
The system will test an individual's blood alcohol level by analyzing the breath exhaled into system, in which the sytem will decide whether to let the individual start the car.
http://www.ee.washington.edu/conselec/Sp96/projects/jeddk2/final/ee498h.htm
A set of simple yet very bright helicopter night-blades. Also describes a 10 minute night blade construction.
http://www.uoguelph.ca/~antoon/gadgets/blade.htm
http://www.techedge.com.au/vehicle/wbo2/5301.htm
The windscreen wiper's motor has a contactor, which connect the holding-current.
http://netti.nic.fi/~graytech/AdapWipe.htm