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TBS VSI Vertical Speed Indicator

This is a simple to install 1x2 Microcontroller.
What it does is take an Input Number and show the delta of it (Limit variable) via the needle.
Additionally it shows the current value (max +-999; max +-9999 on 3x3 and bigger monitors) next to the needle.

Intended use is as analog vertical speed indicator, as known in aircraft.
~But you can use it for any value you want to measure~
I.e you can plug in your fuel tank and measure how fast it depletes, while also displaying how much fuel you have left.

Note:
This Microcontroller adjusts to the size of the Monitor!
See the Image above for more details about the changes.

Changes are:
1) If the numbers are shown with the markings
2) How many digits are listed on the current value


UPDATE
I have included a variable Limit, so you can adjust to the value you want to measure.
You can now set the Limit between 4 and 40!