Bipolar/Unipolar Input to 3.3V

Linear attenuation for a bipolar or unipolar signal +/-10V max, then scaled to 0-3.3V for an Analog to Digital converter. References: [1] non-linear attenuverter https://www.muffwiggler.com/forum/viewtopic.php?t=200553&sid=f17a9063fbcc26aa5260a52956b2f7ac [2] scale and offset https://renbeeves.com/assets/pdf/mutable_instruments/shades_v30.pdf