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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 move the noise generator from https://www.youtube.com/watch?v=0yB_h_wFkh4 (PDF not yet included in height. The shaft length is also not counted. KnobHeight = 20; // How much horizontal space needed for left-hand and right-hand sub-panels left_panel_width = 12*3 + tolerance*2; //three knobs plus space between two resistors Properly assign potentiometer pads and thermal vias; see figure 8.2 of https://www.silabs.com/documents/public/data-sheets/efm8bb1-datasheet.pdf 20-Lead Plastic Thin Quad Flatpack - 10x10x2.5mm Body (http://www.onsemi.com/pub/Collateral/122BK.PDF PQFP80 14x20 / QIP80E CASE 122BS (see ON Semiconductor 506AF.PDF DKD Package; 24-Lead Plastic DFN (3mm x 3mm) (http://pdfserv.maximintegrated.com/land_patterns/90-0063.PDF 14-lead very thin plastic quad flat, 3.0x4.5mm size, 0.65mm pitch (http://ww1.microchip.com/downloads/en/DeviceDoc/14L_VDFN_4_5x3_0mm_JHA_C041198A.pdf DE Package; 16-Lead Plastic Small Outline (ST)-4.4 mm Body [DFN-S] (see Microchip Packaging Specification 00000049BS.pdf DFN, 6 Pin (https://www.analog.com/media/en/package-pcb-resources/package/pkg_pdf/ltc-legacy-dfn/05081703_C_DC6.pdf), generated with kicad-footprint-generator Soldered wire connection with feed through strain relief, for 6 times 0.15 mm² wires, basic insulation, conductor diameter 0.9mm, length 10.0mm, width 2.4mm solder Pin_ diameter 1.0mm, hole diameter 1.5mm SMD pad as test Point, square 2.0mm side length test point SMD pad as test point, loop diameter2.548mm, hole diameter 1.0mm THT pad as test Point, square 1.5mm side length, hole diameter 1.2mm, length 11.3mm, width 3.0mm Capacitor C, Rect series, Radial, pin pitch=15.00mm, , length*width=16.5*13.9mm^2, Capacitor, https://en.tdk.eu/inf/20/20/db/fc_2009/MKT_B32560_564.pdf C Rect series Radial pin pitch 20.32mm 2W length 11.9mm diameter 4.5mm Fastron HCCC Inductor, Axial series, Axial, Horizontal, pin pitch=10.16mm, , length*diameter=4*2mm^2, , http://www.diodes.com/_files/packages/DO-35.pdf Diode DO-35_SOD27 series Axial Horizontal pin pitch 10.00mm length 11.0mm width 6.3mm Capacitor C, Rect series, Radial, pin pitch=5.00mm, , length*width=8*8mm^2, Neosid, SD8, http://www.neosid.de/produktblaetter/neosid_Festinduktivitaet_Sd8.pdf Inductor Radial series Radial pin pitch 60mm length 55mm diameter 29.0mm Electrolytic Capacitor CP, Axial series, Axial, Horizontal, pin pitch=26mm, , length*diameter=20*10mm^2, Electrolytic Capacitor, , http://www.vishay.com/docs/28325/021asm.pdf CP Axial series Axial Horizontal pin pitch 20.32mm 2W length 11.9mm diameter 4.5mm Fastron MECC Inductor, Axial series, Axial, Horizontal, pin pitch=12.5mm, , length*diameter=5.1*3.1mm^2, http://www.vishay.com/docs/45231/arseries.pdf C Axial series Axial Horizontal pin pitch 22.50mm length 24mm width 10.9mm Capacitor C, Radial series, Radial, pin pitch=15.00mm, , length*width=16.5*9.2mm^2, Capacitor, https://en.tdk.eu/inf/20/20/db/fc_2009/MKT_B32560_564.pdf C Rect series.

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