Electricity Experiments

Lately I have made a few different projects, mostly all relating to automotive electronics/computers. I made this fuel/air ratio meter that reads the signal (voltage) off of the O2 sensor (oxygen sensor in the exhaust path) and displays it on a 10 LED bar graph thingy that shows the driver what kind of fuel economy they can predict. Its more so a test of the electronics and such for when we get TurboCar up and running and have to ACCURATELY monitor that stuff to make sure as to not melt pistons from a lean mixture. I also found some schematics for a tachometer that uses the same chips, for the most part, and just uses a 20 LED readout. There is a frequency to voltage converter in there that turns the pulse signal from the electronic ignition (aftermarket) into a voltage that can be read by the bar graph display chips. It is a great circuit in design...and as soon as the VW Bug is up and running I may build one for it since it is a stick shift car and all. Anyway, other than those little circuits, I am also working on a interface to connect a serial port (computer) to the Engine Management Computer in the TurboCar. This way, using some fancy EPROM hacking (not really), I can change fuel/air ratios, boost settings, etc. in fine tuning the vehicle, and of course, take data. TurboCar information is somewhere else on this website...not sure where I put it. Go fetch!

My little Jaccobs Ladder. Isn't it cute?

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Last Updated: Thursday, January 15, 2004