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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 a diameter between 16-19 mm: https://www.keyelco.com/product.cfm/product_id/826 Keystone #500, 12mm CR1220 battery holder, Keystone P/N 2468, http://www.keyelco.com/product-pdf.cfm?p=1033 AAA battery holder Keystone type 105 battery holder coin cell vertical battery CR-2025 coin cell retainer Keystone type 3000 coin cell vertical Panasonic CR-2450/VAN battery, https://industrial.panasonic.com/cdbs/www-data/pdf2/AAA4000/AAA4000D492.PDF battery CR-2450 coin cell holder Keystone type 104 battery holder Keystone type 1057 coin cell retainer CR2032 BR2032 BatteryHolder Battery AA battery holder Keystone type 106 battery holder Keystone 2xAAA cell battery CR-1025 coin cell vertical Panasonic CR-1220/VCN battery, https://industrial.panasonic.com/cdbs/www-data/pdf2/AAA4000/AAA4000D140.PDF battery CR-1220 coin cell retainer BR2016 CR2016 DL2016 BR2020 CL2020 BR2025 CR2025 DL2025 DR2032 CR2032 DL2032 Keystone type 105 battery holder for 2020, 2025 and 2032 coincell batteries. Http://www.keyelco.com/product-pdf.cfm?p=798 Keystone type 2993 negative battery contact Keystone type 3008 coin cell vertical Panasonic CR-2032/VS1N battery, https://industrial.panasonic.com/cdbs/www-data/pdf2/AAA4000/AAA4000D348.PDF battery CR-2032 coin cell retainer SMT battery holder Keystone type 3034 coin cell vertical Panasonic CR-2032/VS1N battery, https://industrial.panasonic.com/cdbs/www-data/pdf2/AAA4000/AAA4000D348.PDF battery CR-2032 coin cell cr1216 cr1220 cr1225 1xPP3 (9V) battery holder, Keystone P/N 2462, https://www.keyelco.com/product-pdf.cfm?p=1027 1xAAA Battery Holder, 2479, Battery Type 3xAA (Script generated with kicad-footprint-generator Molex CLIK-Mate series connector, B9B-PH-SM4-TB (http://www.jst-mfg.com/product/pdf/eng/ePH.pdf), generated with kicad-footprint-generator Molex Molex 1.00mm Pitch Easy-On BackFlip Type FFC/FPC, 502250-1791, 17 Circuits (https://www.molex.com/pdm_docs/sd/2005280170_sd.pdf), generated with kicad-footprint-generator connector wire 0.25sqmm strain-relief Soldered wire connection, for 2 times 2 mm² wires, reinforced insulation, conductor diameter 0.4mm, outer diameter 4.4mm, size source Multi-Contact FLEXI-xV 2.5 (https://ec.staubli.com/AcroFiles/Catalogues/TM_Cab-Main-11014119_(en)_hi.pdf), bend radius 3 times outer diameter, generated with kicad-footprint-generator Soldered wire connection, for 4 times 1 mm² wires, basic insulation, conductor diameter 1.25mm, outer diameter 1mm, size source Multi-Contact FLEXI-E_0.25 (https://ec.staubli.com/AcroFiles/Catalogues/TM_Cab-Main-11014119_(en)_hi.pdf), bend radius 3 times.

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