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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 inputs made for an e-drum kit. Period: 3 days 1 day Digital Reverberation Unit, http://www.belton.co.kr/inc/downfile.php?seq=17&file=pdf (footprint from http://www.uk-electronic.de/PDF/BTDR-1.pdf Bulgin Battery Holder, 2479, Battery Type 3xAA Battery Holder 2479 Battery Type 3xAAA (Script generated with kicad-footprint-generator Molex SPOX Connector System, 5268-11A, 11 Pins per row (http://suddendocs.samtec.com/prints/hle-1xx-02-xxx-dv-xx-xx-xx-mkt.pdf, http://suddendocs.samtec.com/prints/hle-dv-footprint.pdf), generated with kicad-footprint-generator Mounting Hardware, inside through hole M2, height 2.5, Wuerth electronics 9774070943 (https://katalog.we-online.de/em/datasheet/9774070943.pdf), generated with kicad-footprint-generator JST PUD series connector, B10B-ZESK-D (http://www.jst-mfg.com/product/pdf/eng/eZE.pdf), generated with kicad-footprint-generator Samtec HLE .100" Tiger Beam Cost-effective Single Beam Socket Strip, HLE-125-02-xx-DV-TE, 25 Pins per row (http://suddendocs.samtec.com/prints/hle-1xx-02-xxx-dv-xx-xx-xx-mkt.pdf, http://suddendocs.samtec.com/prints/hle-dv-footprint.pdf), generated with kicad-footprint-generator Samtec HLE .100" Tiger Beam Cost-effective Single Beam Socket Strip, HLE-147-02-xxx-DV-A, 47 Pins per row (https://www.hirose.com/product/en/products/FH12/FH12-24S-0.5SH(55)/), generated with kicad-footprint-generator ipc_noLead_generator.py VQFN, 28 Pin (JEDEC MO-194 Var BB https://www.jedec.org/document_search?search_api_views_fulltext=MO-194), generated with kicad-footprint-generator Molex SlimStack Fine-Pitch SMT Board-to-Board Connectors, 502430-4010, 40 Pins per row (http://suddendocs.samtec.com/prints/hle-1xx-02-xxx-dv-xx-xx-xx-mkt.pdf, http://suddendocs.samtec.com/prints/hle-dv-footprint.pdf), generated with kicad-footprint-generator Hirose DF12E SMD, DF12E3.0-80DP-0.5V, 80 Pins per row (https://www.hirose.com/product/document?clcode=CL0537-0694-9-81&productname=DF12C(3.0)-50DS-0.5V(81)&series=DF12&documenttype=2DDrawing⟨=en&documentid=0000994748), generated with kicad-footprint-generator Molex Micro-Fit 3.0 Connector System, 5267-15A, 15 Pins per row (http://suddendocs.samtec.com/prints/hle-1xx-02-xxx-dv-xx-xx-xx-mkt.pdf, http://suddendocs.samtec.com/prints/hle-dv-footprint.pdf), generated with kicad-footprint-generator JST VH series connector, B14B-ZESK-D (http://www.jst-mfg.com/product/pdf/eng/eZE.pdf), generated with kicad-footprint-generator ipc_noLead_generator.py VQFN, 20 Pin (http://ww1.microchip.com/downloads/en/DeviceDoc/20%20Lead%20VQFN%203x3x0_9mm_1_7EP%20U2B%20C04-21496a.pdf), generated with kicad-footprint-generator Mounting Hardware, inside through hole 4.5mm, height 10, Wuerth electronics 9774030943 (https://katalog.we-online.de/em/datasheet/9774030943.pdf), generated with kicad-footprint-generator connector Molex SL vertical Molex KK 396 Interconnect System, old/engineering part number: 26-60-4160, 16 Pins (http://www.molex.com/pdm_docs/sd/022272021_sd.pdf), generated with kicad-footprint-generator Molex PicoBlade Connector System, 5267-12A, 12 Pins (http://www.molex.com/pdm_docs/sd/908140004_sd.pdf), generated with kicad-footprint-generator ipc_gullwing_generator.py ON Semi DFN5 5x6mm 1.27P SO-8FL CASE 488A https://www.onsemi.com/pub/Collateral/488AA.PDF ON Semi DFN5 5x6mm 1.27P SO-8FL CASE 488A https://www.onsemi.com/pub/Collateral/488AA.PDF ON Semi DFN5 5x6mm 1.27P SO-8FL CASE 488A https://www.onsemi.com/pub/Collateral/488AA.PDF ON Semi DFN5 5x6mm 1.27P SO-8FL CASE 488A https://www.onsemi.com/pub/Collateral/488AA.PDF ON Semi DFN5 5x6mm 1.27P SO-8FL CASE 488A https://www.onsemi.com/pub/Collateral/488AA.PDF ON Semi DFN5 5x6mm 1.27P SO-8FL CASE 488A ON Semiconductor 932AZ.PDF TQFP128.

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