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Vias and counter-pad, see http://www.ti.com/lit/ds/symlink/tps62177.pdf WSON 0.5 thermal vias in pads, 4 Pins per row (http://www.molex.com/pdm_docs/sd/530480210_sd.pdf), generated with kicad-footprint-generator Soldered wire connection with double feed through strain relief, for a box film cap instead of the rail + a safety margin // margins from edges h_margin = hole_dist_side + thickness; width_mm = hp_mm(width); // where to put the notice in a ring arrangement; a challenging PCB and/or print job! See PDF at https://raw.githubusercontent.com/kassu/kassutronics/master/documentation/Quantizer/Quantizer_Build_Docs_1.1A.pdf for explanation about PWM smoothing; essentially a 4-stage RC network but with buffering between (some) stages. Needs a 4040 binary counter, but separated quantizer might not https://www.youtube.com/watch?v=3v1yTFsypqA Sample & Hold MK's S&H, though maybe.

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