I'm trying to build my own ESC following a schematic I found online, and something that is tripping me up is the voltage divider circuit. I know it's Electronics 101 stuff but I cannot get the numbers to compute with the different variations I've tried. The circuit image is attached. It is meant to drop the source voltage of 16.8 down to 3.3 for the microcontroller. I'm not getting a number near 3.3 in my math. It's the 4k resistor that I do not know how to place in the equation.
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