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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 an eye towards doing it all in one module with lots of analog drum voices; based heavily on Moritz Klein's schematic, with features added from Skull and Circuit's VCA v1.3. D952ec97f3 Go to file db7d02719b Find and replace last few thin traces, fix teardrops and gnd fill Find and replace last few thin traces, fix teardrops and gnd fill f63cfba954 Embiggen traces, add teardrops updated C5 footprint & tracing; schematic annotation update with full threaded nose and offset PCB pins, gold plated contacts, fully threaded nose, https://www.neutrik.com/en/product/nsj12hf-1 Stacking Jacks, Stereo dual jack, full threaded nose, sleeve contact/front panel connection, https://www.neutrik.com/en/product/nrj6hf-1-au Slim Jacks, 6.35mm (1/4in) switching stereo jack, vertical PCB mount, https://www.neutrik.com/en/product/ncj6fi-h-0 Combo I series, 3 pole female XLR receptacle, grounding: separate ground contact to mating connector shell and front panel, horizontal PCB mount, https://www.neutrik.com/en/product/nc4mbv A Series, Chassis connector H female (A series layout), horizontal PCB mount, http://cherryamericas.com/wp-content/uploads/2014/12/mx_cat.pdf Cherry MX keyswitch, 2.00u, http://matias.ca/switches/ Matias ALPS keyswitch ISO enter 4-bit rotary coded switch, J-hook, https://www.nidec-copal-electronics.com/e/catalog/switch/sh-7000.pdf 4-bit rotary coded switch, gull wing, https://www.nidec-copal-electronics.com/e/catalog/switch/sh-7000.pdf 4-bit rotary coded switch, through-hole, https://www.nidec-copal-electronics.com/e/catalog/switch/sh-7000.pdf SPST Off-On Pushbutton, 1A, 30V, CW Industries P/N GPTS203211B, http://switches-connectors-custom.cwind.com/Asset/GPTS203211BR2.pdf SPST button tactile switch SPST right angle, PTS645VL58-2 LFS tactile switch switch normally-open pushbutton push-button D MEC 5G single pole normally-open illuminated tactile switch K reed magnetic switch D Switch, triple pole double throw, right angle, http://spec_sheets.e-switch.com/specs/P040042.pdf E-Switch sub miniature slide switch, EG series, SPDT, right angle, PTS645VL83-2 LFS C&K Button tactile switch https://www.ckswitches.com/media/1973/ksc7.pdf C&K Switches 1P1T SMD PTS125 Series 12mm Tact Switch C&K Components, PTS 810 Series, Microminiature SMT Top Actuated, http://www.ckswitches.com/media/1476/pts810.pdf Light Touch Switch 0 Light Touch Switch, https://industrial.panasonic.com/cdbs/www-data/pdf/ATK0000/ATK0000CE7.pdf Surface Mount Single Row 2.54mm (0.1 inch) Pitch PCB Connector, M20-89020xx, 20 Pins (http://www.farnell.com/datasheets/2157639.pdf), generated with kicad-footprint-generator Soldered wire connection with feed through strain relief, for 4 times 0.25 mm² wires, basic insulation, conductor diameter 1.4mm, outer diameter 2.3mm, size source Multi-Contact FLEXI-E 0.1 (https://ec.staubli.com/AcroFiles/Catalogues/TM_Cab-Main-11014119_(en)_hi.pdf), bend radius 3 times outer diameter, generated with kicad-footprint-generator Mounting Hardware, inside through hole 4.5mm, height 5, Wuerth electronics 9774040243 (https://katalog.we-online.de/em/datasheet/9774040243.pdf), generated with kicad-footprint-generator Mounting Hardware, inside through hole 3.3mm, height 4, Wuerth electronics 9774090951 (https://katalog.we-online.de/em/datasheet/9774090951.pdf), generated with kicad-footprint-generator Molex Sabre Power Connector, 46007-1102, 2 Pins (https://www.molex.com/pdm_docs/sd/009652028_sd.pdf), generated with kicad-footprint-generator connector JST XA series connector, S13B-XH-A (http://www.jst-mfg.com/product/pdf/eng/eXH.pdf), generated with kicad-footprint-generator Molex Mini-Universal MATE-N-LOK, old mpn/engineering number.

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