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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/8063fa.pdf Altera BGA-36 V36 VBGA BGA-48 - pitch 0.8 mm Highspeed card edge connector for 2.4mm PCB's with 08 contacts (not polarized Highspeed card edge connector for 1.6mm PCB's with 30 contacts (polarized Highspeed card edge connector for panel, 90° PCB mount (https://www.amphenolltw.com/2012download/2D%20PDF/03_M%20Series%20Sensor%20Connectors/M8S-XXPMMR-SF8001.pdf 3.5 mm, Stereo, Right Angle, Surface Mount, ZIF, 24 Circuits (https://www.molex.com/pdm_docs/sd/5022312400_sd.pdf Molex 0.50mm Pitch Easy-On BackFlip Type FFC/FPC, 502250-3991, 39 Circuits (http://www.molex.com/pdm_docs/sd/5022503991_sd.pdf), generated with kicad-footprint-generator Molex Mini-Fit Jr. Power Connectors, old mpn/engineering number: 5569-24A1, example for new part number: A-41792-0012 example for new part number: AE-6410-08A example for new part number: A-41792-0015 example for new mpn: 39-28-x20x, 10 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 Samtec HLE .100" Tiger Beam Cost-effective Single Beam Socket Strip, HLE-129-02-xxx-DV-BE-LC, 29 Pins per row (http://www.molex.com/pdm_docs/sd/439151404_sd.pdf), generated with kicad-footprint-generator Mounting Hardware, inside through hole PLCC, 28 pins, through hole M3, height 10.6, Wuerth electronics 9774030482 (https://katalog.we-online.de/em/datasheet/9774030482.pdf), generated with kicad-footprint-generator JST PHD series connector, B10B-PUDSS (http://www.jst-mfg.com/product/pdf/eng/ePUD.pdf), generated with kicad-footprint-generator Molex Sabre Power Connector, 46007-1106, With thermal vias in pads, 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 Mounting Hardware, inside through hole 2.7mm, height 2, Wuerth electronics 9771140360 (https://katalog.we-online.com/em/datasheet/9771140360.pdf), generated with kicad-footprint-generator ipc_gullwing_generator.py TSSOP44: plastic thin shrink small outline package; 14 leads; body width 3.9 mm; lead pitch 0.635; (see NXP SSOP-TSSOP-VSO-REFLOW.pdf and sot552-1_po.pdf.

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