🚀 go-pugleaf

Since nobody has mentioned it, I guess I will.  A few years ago I built
a number of things for my truck.  These included digital guages for oil
pressure, system voltage, engine temperature, inside/outside
temperature.  These can be bought commercially (though expensive) thru
different mail order houses.  In addition, I used the sprague fluid
sensor chips to monitor different liquid levels (radiator, ww washer)
and alarm if they fell below a level.  In Arizona this isn't really
needed, but I have seen somewhere a project for a road icing alert using
infared tx/rx setup.  Also digital speedometers using hall effect
sensors for a pickup, run thru some signal conditioning and scaled,
digital tachs.  Of course, this could be all done by a small 6800 type
processor using ADC and DAC's, displayed on a LCD monitor.  

Sorry, I keep refining my ideas.  I'll stop where I am at.

H Cooper  N7KST
Utah-cs!esunix!hcooper