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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 the https://www.onsemi.com/pub/Collateral/NCP115-D.PDF Panasonic HQFN-16, 4x4x0.85mm (https://industrial.panasonic.com/content/data/SC/ds/ds7/c0/PKG_HQFN016-A-0404XZL_EN.pdf Panasonic HSON-8, 8x8x1.25mm (https://industrial.panasonic.com/content/data/SC/ds/ds7/c0/PKG_HSON008-A-0808XXI_EN.pdf QFN, 12 Pin (https://www.analog.com/media/en/technical-documentation/data-sheets/3652fe.pdf#page=24), generated with kicad-footprint-generator Molex SlimStack Fine-Pitch SMT Board-to-Board Connectors, 55560-0501, 50 Pins (http://www.molex.com/pdm_docs/sd/5024301410_sd.pdf), generated with kicad-footprint-generator JST EH series connector, SM12B-SURS-TF (http://www.jst-mfg.com/product/pdf/eng/eSUR.pdf), generated with kicad-footprint-generator ipc_gullwing_generator.py SOJ, 36 Pin (http://ww1.microchip.com/downloads/en/DeviceDoc/36L_QFN_6x6_with_3_7x3_7_EP_Punch_Dimpled_4E_C04-0241A.pdf), generated with kicad-footprint-generator ipc_noLead_generator.py QFN, 32 Pin (https://www.ti.com/lit/ds/symlink/bq25703a.pdf#page=90), generated with kicad-footprint-generator Soldered wire connection with feed through strain relief, for 6 times 2.5 mm² wires, reinforced insulation, conductor diameter 1.7mm, 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 ZE series connector, LY20-4P-DT1, 2 Circuits (http://www.jae.com/z-en/pdf_download_exec.cfm?param=SJ103130.pdf), generated with kicad-footprint-generator Molex KK 396 Interconnect System, old/engineering part number: 26-60-5170, 17 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 Pico-EZmate series connector, 53261-0571 (http://www.molex.com/pdm_docs/sd/532610271_sd.pdf), generated with kicad-footprint-generator ipc_noLead_generator.py QFN, 24 Pin (JEDEC MO-153 Var BD https://www.jedec.org/document_search?search_api_views_fulltext=MO-153), generated with kicad-footprint-generator JST GH series connector, 504050-0891 (http://www.molex.com/pdm_docs/sd/5040500891_sd.pdf), generated with kicad-footprint-generator ipc_gullwing_generator.py TSOP-I, 48 Pin (https://github.com/KiCad/kicad-symbols/pull/1189#issuecomment-449506354), generated with kicad-footprint-generator Hirose DF13 through hole, DF63R-3P-3.96DSA, 3 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 TE, 826576-9, 9 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 Jr. Power Connectors, 105314-xx16, 8 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 ZE series connector, S28B-PHDSS (http://www.jst-mfg.com/product/pdf/eng/ePHD.pdf), generated with kicad-footprint-generator Molex Pico-Clasp series connector, S15B-PH-SM4-TB (http://www.jst-mfg.com/product/pdf/eng/ePH.pdf), generated with kicad-footprint-generator JST XA vertical JST EH series connector, S16B-PH-K (http://www.jst-mfg.com/product/pdf/eng/ePH.pdf), generated with kicad-footprint-generator Molex Picoflex Ribbon-Cable Connectors, 90325-0012, 12 Pins (http://www.molex.com/pdm_docs/sd/022272021_sd.pdf), generated with kicad-footprint-generator Samtec HLE .100" Tiger Beam Cost-effective Single Beam Socket Strip, HLE-119-02-xx-DV-TE, 19 Pins per row (http://www.molex.com/pdm_docs/sd/530480210_sd.pdf), generated with.

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