This may be of interest to some.
Here are photos of my two fuel monitoring systems,
comparing the original Analog system with the new Digital System.
The analog system served long and well, giving accuracy
of fuel flow and fuel used to less than a 1% error. However, it was
large, had 9 chips and only provided two bits of data - Fuel
Flow and Fuel Used as displayed information.
Any change required a change to the design, new chips and a new board.
Very limited upgrade capability and just outdated (well, it actually was when
I designed it - but, being an old analog type myself, it was a interim
system until I could learn a bit about this digital world)
The digit system is much smaller, the one shown used 2
chips (since reduced to one chip- the microprocessor) and provides 9 different
fuel factors (including Air/Fuel ratio indication), has user settable alarms,
remembers fuel parameters at shut down and has an automatic calibration
system. Software changes can be easily (relative speaking) make to accommodate
changes and upgrades. Currently waiting for a new board for version 2 of
the digital - this one will have a larger LCD screen (but will still fit 2
1/4" hole) with graphical capability which I hope to be able to display the
EC2 fuel map in graphical form. The activation buttons will be
re-positioned so that even my fat fingers can better push them.
So after many years of use - old reliable (but
out-dated) analog system is being retired with honors.
Ed
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