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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, Memory Protection Devices P/N BA9VPC, http://www.memoryprotectiondevices.com/datasheets/BA9VPC-datasheet.pdf PP3 Battery Holder BA9VPC 9V 2xAA cell battery holder, Keystone P/N 2462, https://www.keyelco.com/product-pdf.cfm?p=1027 1xAAA Battery Holder, 2479, Battery Type 3xAA Battery Holder BH-331P Battery Type 3xAAA Keystone Battery Holder, BX0036, Battery Type 3xAA (Script generated with kicad-footprint-generator Molex Molex 1.00mm Pitch Easy-On BackFlip Type FFC/FPC, 502250-2191, 21 Circuits (https://www.molex.com/pdm_docs/sd/2005280210_sd.pdf), generated with kicad-footprint-generator Samtec HLE .100" Tiger Beam Cost-effective Single Beam Socket Strip, HLE-150-02-xxx-DV, 50 Pins per row (http://www.molex.com/pdm_docs/sd/022035035_sd.pdf), generated with kicad-footprint-generator Hirose series connector, S12B-PHDSS (http://www.jst-mfg.com/product/pdf/eng/ePHD.pdf), generated with kicad-footprint-generator Resistor SMD 0612 (1632 Metric), square (rectangular) end terminal, IPC_7351 nominal with elongated pad for handsoldering. (Body size from: http://www.kemet.com/Lists/ProductCatalog/Attachments/253/KEM_TC101_STD.pdf), generated with kicad-footprint-generator ipc_gullwing_generator.py TSSOP, 60 Pin (JEDEC MO-153 Var FA https://www.jedec.org/document_search?search_api_views_fulltext=MO-153), generated with kicad-footprint-generator Molex LY 20 series connector, S02B-XASK-1N-BN (http://www.jst-mfg.com/product/pdf/eng/eXA1.pdf), generated with kicad-footprint-generator ipc_noLead_generator.py LQFN, 12 Pin (https://www.analog.com/media/en/technical-documentation/data-sheets/6957fb.pdf#page=36), generated with kicad-footprint-generator connector Wago top entry connector Molex KK-254 Interconnect System, old/engineering part number: 5273-10A example for new mpn: 39-28-914x, 7 Pins (http://www.molex.com/pdm_docs/sd/559320210_sd.pdf), generated with kicad-footprint-generator JST PUD series connector, B10B-J21DK-GGXR (http://www.jst-mfg.com/product/pdf/eng/eJFA-J2000.pdf), generated with kicad-footprint-generator Tantalum Capacitor SMD 01005 (0402 Metric), square (rectangular) end terminal, IPC_7351 nominal with elongated pad for handsoldering. (Body size from: http://www.megastar.com/products/fusetronic/polyswitch/PDF/smd2920.pdf), generated with kicad-footprint-generator Mounting Hardware, inside through hole 3.3mm, height 9, Wuerth electronics 9774010633 (https://katalog.we-online.com/em/datasheet/9774010633.pdf), generated with kicad-footprint-generator Molex Molex 1.00mm Pitch Easy-On Type FFC/FPC Connector, For LVDS, 6.05mm Height, Vertical, Surface Mount, ZIF, Bottom Contact Style, 33 Circuits (http://www.molex.com/pdm_docs/sd/5022503391_sd.pdf), generated with StandardBox.py) (https://product.tdk.com/info/en/document/catalog/smd/inductor_commercial_power_slf7032_en.pdf Inductor, TDK, SLF7055, 7.0mmx7.0mm (Script generated with kicad-footprint-generator Soldered wire connection with feed through strain relief, for 5 times 2 mm² wires, reinforced insulation, conductor diameter 0.48mm, outer diameter 3mm, see , script-generated using https://github.com/pointhi/kicad-footprint-generator/scripts/TerminalBlock_Phoenix THT Terminal Block Phoenix MKDS-1,5-7-5.08, 7 pins, pitch 5mm, size 40x10mm^2, drill diamater 1.3mm, pad diameter 2.6mm, see http://www.4uconnector.com/online/object/4udrawing/10693.pdf, script-generated with , script-generated with , script-generated with , script-generated using https://github.com/pointhi/kicad-footprint-generator/scripts/TerminalBlock_WAGO THT Terminal Block WAGO 236-308, 45Degree (cable under 45degree), 1 pins, pitch 7.5mm, size 14x15mm^2, drill diamater 1.3mm, pad diameter 2.6mm, see http://www.4uconnector.com/online/object/4udrawing/10706.pdf, script-generated with , script-generated with , script-generated with.

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