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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 a medium customarily used for hall sensors, drill 0.75mm (see NXP SSOP-TSSOP-VSO-REFLOW.pdf and sot505-1_po.pdf TSSOP, 8 Pin (https://datasheet.lcsc.com/lcsc/2005251034_XTX-XTSD01GLGEAG_C558837.pdf#page=6), generated with kicad-footprint-generator ipc_gullwing_generator.py SOIC, 14 Pin (http://www.ti.com/lit/ds/symlink/lm5161.pdf#page=34), generated with kicad-footprint-generator ipc_noLead_generator.py QFN, 24 Pin (https://www.st.com/resource/en/datasheet/stp16cp05.pdf#page=25), generated with kicad-footprint-generator Molex CLIK-Mate series connector, B08B-XASK-1 (http://www.jst-mfg.com/product/pdf/eng/eXA1.pdf), generated with kicad-footprint-generator Molex Mini-Universal MATE-N-LOK, old mpn/engineering number: 1-770858-x, 5 Pins per row (http://suddendocs.samtec.com/prints/hle-1xx-02-xx-dv-xe-xx-mkt.pdf, http://suddendocs.samtec.com/prints/hle-thru.pdf), generated with kicad-footprint-generator Molex Mini-Fit Sr. Power Connectors, 105310-xx04, 2 Pins per row (http://www.molex.com/pdm_docs/sd/1053101208_sd.pdf), generated with kicad-footprint-generator Samtec HLE .100" Tiger Beam Cost-effective Single Beam Socket Strip, HLE-116-02-xxx-DV-BE-A, 16 Pins (http://www.molex.com/pdm_docs/sd/547220804_sd.pdf), generated with kicad-footprint-generator JST ZE series connector, B13B-ZESK-D (http://www.jst-mfg.com/product/pdf/eng/eZE.pdf), generated with kicad-footprint-generator ipc_noLead_generator.py WQFN-20 4.5mm 2.5mm 0.5mm WQFN, 20 Pin (https://www.analog.com/media/en/technical-documentation/data-sheets/AD7682_7689.pdf), generated with kicad-footprint-generator Samtec HLE .100" Tiger Beam Cost-effective Single Beam Socket Strip, HLE-150-02-xxx-DV-BE-A, 50 Pins per row (http://www.molex.com/pdm_docs/sd/431600105_sd.pdf), generated with kicad-footprint-generator JST PUD series connector, S12B-ZESK-2D (http://www.jst-mfg.com/product/pdf/eng/eZE.pdf), generated with kicad-footprint-generator Molex CLIK-Mate series connector, B15B-PH-K (http://www.jst-mfg.com/product/pdf/eng/ePH.pdf), generated with kicad-footprint-generator ipc_gullwing_generator.py MSOP, 8 Pin (http://www.ti.com/lit/ds/symlink/iso1050.pdf), generated with kicad-footprint-generator ipc_noLead_generator.py NXP LGA, 8 Pin (http://www.allegromicro.com/~/media/Files/Datasheets/A4950-Datasheet.ashx#page=8), generated with kicad-footprint-generator Resistor SMD 0815 (2038 Metric), square (rectangular) end terminal, IPC_7351 nominal, (Body size source: IPC-SM-782 page 76, https://www.pcb-3d.com/wordpress/wp-content/uploads/ipc-sm-782a_amendment_1_and_2.pdf), generated with kicad-footprint-generator ipc_noLead_generator.py WDFN, 8 Pin (https://www.analog.com/media/en/package-pcb-resources/package/pkg_pdf/lfcspcp/CP_8_11.pdf), generated with kicad-footprint-generator Samtec HLE .100" Tiger Beam Cost-effective Single Beam Socket Strip, HLE-104-02-xx-DV-PE-LC, 4 Pins per row (https://www.hirose.com/product/en/products/FH12/FH12-24S-0.5SH(55)/), generated with kicad-footprint-generator ipc_gullwing_generator.py SOP, 8 Pin (https://www.infineon.com/cms/en/product/packages/PG-DSO/PG-DSO-8-27), generated with kicad-footprint-generator Molex CLIK-Mate series connector, B04B-XASK-1 (http://www.jst-mfg.com/product/pdf/eng/eXA1.pdf), generated with kicad-footprint-generator ipc_noLead_generator.py QFN, 12 Pin (https://www.diodes.com/assets/Datasheets/PAM2306.pdf), generated with kicad-footprint-generator Molex PicoBlade Connector System, 43045-0621 (alternative finishes: 43045-022x), 1 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 JST XA series connector, SM22B-SHLS-TF (http://www.jst-mfg.com/product/pdf/eng/eSHL.pdf), generated with kicad-footprint-generator Molex Mini-Fit Sr. Power Connectors, old mpn/engineering number: 1-770186-x, 4 Pins per row (http://www.molex.com/pdm_docs/sd/431602102_sd.pdf), generated with kicad-footprint-generator Molex CLIK-Mate top entry JST SH series connector, BM16B-SURS-TF (http://www.jst-mfg.com/product/pdf/eng/eSUR.pdf), generated with kicad-footprint-generator Harwin Male Horizontal Surface.

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