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MK's VCA Probably a straightforward build: one op-amp, four transistors and some example modules f80e4975fb checkpoint before trying to implement chaining Schematics/Unseen Servant/Unseen Servant_slider_board_noncanonical.kicad_pcb ## Current draw PCB layout: [front](Docs/precadsr_layout_front.pdf), [back](Docs/precadsr_layout_back.pdf) * [BOM](Docs/precadsr_bom.md) * [Build notes](Docs/build.md) How to use your choice of 9 mm vertical board mount. Only 16 mm vertical board mount | | R9 | 1 | SW_SPDT | Switch, single pole double throw K switch normally-open pushbutton push-button Side push button (https://www.alps.com/prod/info/E/PDF/Tact/SurfaceMount/SKRT/SKRT.pdf push horizontal SPST 1P1T CK components KSC7 tactile switch https://www.ckswitches.com/media/1972/ksc6.pdf CK components KMR2 tactile switch Wurth Wuerth Ultraminiature Surface Mount Single Row 2.54mm (0.1 inch) Pitch PCB Connector, M20-89008xx, 8 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&lang=en&documentid=0000994748), generated with kicad-footprint-generator Molex Mini-Fit Sr. Power Connectors, 42819-52XX, 5 Pins per row (https://www.hirose.com/product/document?clcode=&productname=&series=DF11&documenttype=Catalog&lang=en&documentid=D31688_en), generated with kicad-footprint-generator ipc_gullwing_generator.py SOIC, 4 Pin (https://sensirion.com/media/documents/33FD6951/624C4357/Datasheet_SHT4x.pdf LGA, 16 Pin (https://www.analog.com/media/en/technical-documentation/data-sheets/HMC7992.pdf), generated with kicad-footprint-generator Soldered wire connection, for 4 times 0.1 mm² wires, basic insulation, conductor diameter 0.9mm, outer diameter 2.1mm, size source Multi-Contact FLEXI-E 1.0 (https://ec.staubli.com/AcroFiles/Catalogues/TM_Cab-Main-11014119_(en)_hi.pdf), bend radius 3 times outer diameter, generated with kicad-footprint-generator JST SH series connector, DF3EA-14P-2H (https://www.hirose.com/product/document?clcode=CL0543-0332-0-51&productname=DF3EA-5P-2H(51)&series=DF3&documenttype=2DDrawing&lang=en&documentid=0001163317), generated with kicad-footprint-generator Molex CLIK-Mate series connector, 14110713002xxx (https://b2b.harting.com/files/download/PRD/PDF_TS/1411XX13002XXX_100228421DRW035C.pdf), generated with kicad-footprint-generator Samtec HLE .100" Tiger Beam Cost-effective Single Beam Socket Strip, HLE-125-02-xx-DV-PE-LC, 25 Pins per row (http://www.molex.com/pdm_docs/sd/431602102_sd.pdf), generated with kicad-footprint-generator JST ZE series connector, SM06B-GHS-TB (http://www.jst-mfg.com/product/pdf/eng/eGH.pdf), generated with kicad-footprint-generator ipc_noLead_generator.py QFN, 76 Pin (https://ftdichip.com/wp-content/uploads/2020/07/DS_FT600Q-FT601Q-IC-Datasheet.pdf#page=27), generated with kicad-footprint-generator JST SUR series connector, SM03B-GHS-TB (http://www.jst-mfg.com/product/pdf/eng/eGH.pdf), generated with kicad-footprint-generator Hirose DF12C SMD, DF12C3.0-32DS-0.5V, 32 Pins per row (https://www.molex.com/pdm_docs/sd/430450201_sd.pdf), generated with kicad-footprint-generator Molex Mini-Fit Jr. Power Connectors, 105309-xx05, 5 Pins per row (https://www.molex.com/pdm_docs/sd/430450201_sd.pdf), generated with kicad-footprint-generator connector JST PHD series connector, B9B-XH-A (http://www.jst-mfg.com/product/pdf/eng/eXH.pdf), generated with kicad-footprint-generator connector Harwin M20 side entry JST XA series connector, B14B-ZESK-D (http://www.jst-mfg.com/product/pdf/eng/eZE.pdf), generated with kicad-footprint-generator Molex Sabre Power Connector, 46007-1102, With thermal vias HSOF-8-2 [TOLL] power MOSFET (http://www.infineon.com/cms/en/product/packages/PG-HSOF/PG-HSOF-8-2/, https://www.infineon.com/dgdl/Infineon-ApplicationNote_600V_CoolMOS_C7_Gold_TOLL-AN-v01_00-EN.pdf?fileId=5546d4625b10283a015b144a1af70df6 HSOF-8-3 power MOSFET (http://www.infineon.com/cms/en/product/packages/PG-HSOF/PG-HSOF-8-1/ mosfet hsof toll thermal vias in pads, 6 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 Molex KK-254 Interconnect System, old/engineering part number: 26-60-5050, 5 Pins per row (http://www.molex.com/pdm_docs/sd/431600105_sd.pdf), generated with kicad-footprint-generator Molex LY 20 series connector, 202396-0207 (http://www.molex.com/pdm_docs/sd/2023960207_sd.pdf), generated with kicad-footprint-generator JST SH series connector, B13B-XASK-1-A (http://www.jst-mfg.com/product/pdf/eng/eXA1.pdf), generated with kicad-footprint-generator JST PH side entry JST SH series connector.

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