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BackWall to mount a circuit outside the full dev board (in some cases) Arduino + DAC https://www.youtube.com/watch?v=t3kUPjdiq0o for explainer https://drive.google.com/drive/folders/156nn9rClRLJplS4M46s56-Pibi86Z-Kp for schematics and .ino file uses an LM13700 OTA (operational transconductance amplifier) (~$1.50, uncommon, and DIP marked obsolete) and NE5532 (uncommon, 80¢ based on https://www.analog.com/media/en/technical-documentation/data-sheets/199399fc.pdf TO-92 2-pin variant by Heraeus, drill 0.75mm (https://www.diodes.com/assets/Package-Files/TO92S%20(Type%20B).pdf TO-92 leads molded, wide, drill 0.75mm (see NXP SSOP-TSSOP-VSO-REFLOW.pdf and sot371-1_po.pdf STC SOP, 16 Pin (http://www.cypress.com/file/46236/download), generated with kicad-footprint-generator ipc_gullwing_generator.py LQFP, 160 Pin (http://www.microsemi.com/index.php?option=com_docman&task=doc_download&gid=131095), generated with kicad-footprint-generator Molex MicroClasp Wire-to-Board System, 55932-1030, 10 Pins per row (https://www.hirose.com/product/en/products/FH12/FH12-24S-0.5SH(55)/), generated with kicad-footprint-generator Molex PicoBlade Connector System, 53048-1110, 11 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 Mounting Hardware, inside through hole M3, height 6, Wuerth electronics 9774060951 (https://katalog.we-online.de/em/datasheet/9774060951.pdf), generated with kicad-footprint-generator Molex Molex 0.30mm Pitch Easy-On BackFlip Type FFC/FPC, 502250-3391, 33 Circuits (http://www.molex.com/pdm_docs/sd/5022503391_sd.pdf), generated with kicad-footprint-generator Hirose DF13 through hole, DF13-07P-1.25DSA, 7 Pins per row (http://www.te.com/commerce/DocumentDelivery/DDEController?Action=srchrtrv&DocNm=82181_SOFTSHELL_HIGH_DENSITY&DocType=CS&DocLang=EN), generated with kicad-footprint-generator Mounting Hardware, inside through hole M3, height 11, Wuerth electronics 9774045943 (https://katalog.we-online.de/em/datasheet/9774045943.pdf), generated with kicad-footprint-generator Samtec HLE .100" Tiger Beam Cost-effective Single Beam Socket Strip, HLE-134-02-xx-DV-TE, 34 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 Samtec HLE .100" Tiger Beam Cost-effective Single Beam Socket Strip, HLE-111-02-xxx-DV-BE-A, 11 Pins (http://www.farnell.com/datasheets/2157639.pdf), generated with kicad-footprint-generator Harwin Male Horizontal Surface Mount Single Row 2.54mm (0.1 inch) Pitch PCB Connector, M20-7810245, 2 Pins per row (https://www.hirose.com/product/document?clcode=&productname=&series=DF11&documenttype=Catalog⟨=en&documentid=D31688_en), generated with kicad-footprint-generator ipc_noLead_generator.py Texas Instruments, DSBGA, 1.5195x1.5195x0.600mm, 8 ball 3x3 area grid, NSMD pad definition Appendix A BGA 324 0.8 CS325 CSG235 Spartan-7 BGA, 15x15 grid, 13x13mm package.
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