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 Very limited upgrade capability and just outdated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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