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Sorry if I sound very dumb, but isn't there something wrong with your formulas? Shouldn't Vout be somehow related to Vin, not only to R1 and R2? How do you get Volts if you have just a ratio of Ohms?
Beyond Beginner Welding
Welcome to Welding
Tools and Materials
Introducing the Microcontroller + Arduino
Wearable Electronics Class
I wonder if such "delignified" wood could be used as a kind of microporous filter material (the epoxy part of the protocol would probably be omitted then).