"floating point" signal adder

Description
Pretty accurate
Doesn't like buffer over flows
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Features:
*Buffer overflow represented as a number
* 4 bits of floating point accuracy
* accuracy checker
* principia type signal output
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How I did it:
I converted to analog signals into binary with a stepper for floating point correction
I then built a binary adder
And then converted the final signal into binary
And added in some extra circuitry for some overflow correction