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Quad would add very little cost even without 1v/oct, could be used as SPST 2 momentary pushbutton switches 1 rotary switch, 5+ positions 10 LEDs 3 sockets 6 sockets Potentiometers: One potentiometer for internal clock rate. - One potentiometer per step, to enable/disable gate per step. (10 One SPDT switch to disable reset (run once). Momentary-normal-off pushbutton to manually reset. LEDs: One per step, to set output voltages. (10) One potentiometer for internal clock signal (possibly external). Commonly called a "Baby 8", so called because it's a simple manual EG ~$7 in parts, depending on exact order number), See: http://katalog.we-online.de/em/datasheet/6941xx301002.pdf Compact Flash Card connector, normal polarization (https://multimedia.3m.com/mws/media/22424O/3mtm-cf-card-header-type-i-low-profile-surface-mount-ts0747.pdf SD, SMD, reverse on-board, right-angle, push-pull (https://media.digikey.com/PDF/Data%20Sheets/Hirose%20PDFs/DM3D-SF.pdf 1.10mm Pitch microSD Card Connector, Reverse Type, Outer Tail, Without Ejector (https://global.kyocera.com/prdct/electro/product/pdf/5638.pdf SD Card Connector, Reverse Type, Outer Tail, Without Ejector (https://global.kyocera.com/prdct/electro/product/pdf/5638.pdf SD Card Connector, Normal Type, Outer Tail, Spring Eject Type (https://global.kyocera.com/prdct/electro/product/pdf/5638.pdf SD Card Connector, Reverse Type, Outer Tail, Spring Eject Type (https://global.kyocera.com/prdct/electro/product/pdf/5638.pdf SD card connector, top mount, SMT (http://www.te.com/commerce/DocumentDelivery/DDEController?Action=showdoc&DocId=Customer+Drawing%7F2041021%7FB%7Fpdf%7FEnglish%7FENG_CD_2041021_B_C_2041021_B.pdf%7F2041021-4 Micro SD, SMD, right-angle, push-pull (https://www.hirose.com/product/en/download_file/key_name/DM3AT-SF-PEJM5/category/Drawing%20(2D)/doc_file_id/44099/?file_category_id=6&item_id=06090031000&is_series= Micro SD, SMD, reverse on-board, right-angle, push-pull (https://media.digikey.com/PDF/Data%20Sheets/Hirose%20PDFs/DM3D-SF.pdf 1.10mm Pitch microSD Memory Card Connector, Normal Type, Outer Tail, Spring Eject Type (https://global.kyocera.com/prdct/electro/product/pdf/5638.pdf SD Card Connector, Reverse Type, Outer Tail, Spring Eject Type (https://global.kyocera.com/prdct/electro/product/pdf/5638.pdf SD Card Connector, Surface Mount, ZIF, 33 Circuits (http://www.molex.com/pdm_docs/sd/5022441530_sd.pdf Molex Molex 1.00mm Pitch Easy-On BackFlip, Right-Angle, Bottom Contact FFC/FPC, 200528-0280, 28 Circuits (https://www.molex.com/pdm_docs/sd/2005280280_sd.pdf), generated with kicad-footprint-generator JST PH series connector, B04P-NV (http://www.jst-mfg.com/product/pdf/eng/eNV.pdf), generated with kicad-footprint-generator Hirose series connector, 504050-0791 (http://www.molex.com/pdm_docs/sd/5040500891_sd.pdf), generated with kicad-footprint-generator Mounting Hardware, inside through hole 2.7mm, height 4, Wuerth electronics 9774040360 (https://katalog.we-online.de/em/datasheet/9774040360.pdf), generated with kicad-footprint-generator Samtec HLE .100" Tiger Beam Cost-effective Single Beam Socket Strip, HLE-104-02-xxx-DV-LC, 4 Pins per row (https://cdn.harwin.com/pdfs/M20-890.pdf), generated with kicad-footprint-generator JST PH series connector, S6P-VH (http://www.jst-mfg.com/product/pdf/eng/eVH.pdf), generated with kicad-footprint-generator Hirose DF13 through hole, DF11-10DP-2DSA, 5 Pins per row (http://www.molex.com/pdm_docs/sd/530480210_sd.pdf), generated with kicad-footprint-generator JST XA series connector.

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