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Http://www.keyelco.com/product-pdf.cfm?p=710 Battery holder for CR1216/1220/1225, https://linxtechnologies.com/wp/wp-content/uploads/bat-hld-012-smt.pdf battery holder with leaf spring, Keystone, https://ken.keyeuro.eu/cat/590.pdf AA battery holder Keystone 2xAAA cell battery CR-1025 coin cell vertical Panasonic CR-2450/VAN battery, https://industrial.panasonic.com/cdbs/www-data/pdf2/AAA4000/AAA4000D492.PDF battery CR-2450 coin cell vertical Panasonic CR-1632-V1AN battery, https://industrial.panasonic.com/cdbs/www-data/pdf2/AAA4000/AAA4000D464.PDF battery CR-1632 coin cell vertical Panasonic CR-2032/VS1N battery, https://industrial.panasonic.com/cdbs/www-data/pdf2/AAA4000/AAA4000D348.PDF battery CR-2032 coin cell Panasonic CR-2477/VCN battery, https://industrial.panasonic.com/cdbs/www-data/pdf2/AAA4000/AAA4000D502.PDF battery CR-2477 coin cell vertical Panasonic CR-2450/VAN battery, https://industrial.panasonic.com/cdbs/www-data/pdf2/AAA4000/AAA4000D492.PDF battery CR-2450 coin cell retainer Keystone type 106 battery holder Keystone type 104 battery holder Keystone SMT (Auto-In/Ultra-Low) Holder for 2032 Cell, 33.2 x 23.9mm, 2mm height above PCB, https://www.keyelco.com/userAssets/file/M65p4.pdf Keystone type 104 battery holder for CR1216/1220/1225, https://linxtechnologies.com/wp/wp-content/uploads/bat-hld-012-smt.pdf battery holder with leaf spring, Keystone, https://ken.keyeuro.eu/cat/590.pdf AA battery holder Keystone #500, CR1220 battery holder, Memory Protection Devices P/N BC2AAPC, http://www.memoryprotectiondevices.com/datasheets/BC2AAPC-datasheet.pdf 2xAA cell battery holder, http://www.keyelco.com/product-pdf.cfm?p=710 Battery holder for 2020, 2025 and 2032 coincell batteries. Http://www.keyelco.com/product-pdf.cfm?p=798 Keystone type 104 battery holder Keystone Battery Holder SMD Tactile Switch, http://www.helloxkb.com/public/images/pdf/TS-1187A-X-X-X.pdf Ultraminiature Surface Mount (SMT), Audio Jack Connector (https://www.cui.com/product/resource/sj-352x-smt-series.pdf 3.5mm audio cui horizontal jack stereo TRS 3.5mm, horizontal, through-hole, with switch, vertical shaft, https://www.bourns.com/docs/product-datasheets/pec12r.pdf Bourns rotary encoder, EC12E... With switch, vertical shaft, mounting holes 33.3mm, distance of mounting holes distance 63.5mm 62-pin D-Sub connector edge mount solder cup male x-pin-pitch 2.77mm mounting holes distance 47.1mm 25-pin D-Sub connector, horizontal/angled (90 deg), THT-mount, male, pitch 2.29x1.98mm, distance of mounting holes distance 47.1mm 44-pin D-Sub connector edge mount solder cup female x-pin-pitch 2.77mm mounting holes to PCB for holding three chips (two 74s, one 72) Noise MK's S&H not strictly a noise and envelope generator synth module. Layout and panel are Kosmo format. * [Schematic](Docs/precadsr.pdf) * PCB layout: [front](Docs/precadsr_layout_front.pdf), [back](Docs/precadsr_layout_back.pdf .

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