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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 EPCOS app note 93 (https://www.catagle.com/45-2/PDF_AN93.htm Bourns TBU-CA Fuse, 2 Pin (https://www.bourns.com/data/global/pdfs/TBU-CA.pdf), generated with kicad-footprint-generator JST VH series connector, B9PS-VH (http://www.jst-mfg.com/product/pdf/eng/eVH.pdf), generated with kicad-footprint-generator ipc_gullwing_generator.py LQFP, 176 Pin (http://www.microsemi.com/index.php?option=com_docman&task=doc_download&gid=131095), generated with kicad-footprint-generator connector wire 0.25sqmm double-strain-relief Soldered wire connection with double feed through strain relief, for a single 0.5 mm² wires, basic insulation, conductor diameter 0.65mm, outer diameter 2.7mm, size source Multi-Contact FLEXI-xV 0.75 (https://ec.staubli.com/AcroFiles/Catalogues/TM_Cab-Main-11014119_(en)_hi.pdf), bend radius 3 times outer diameter, generated with kicad-footprint-generator Molex Mini-Universal MATE-N-LOK, old mpn/engineering number: 5566-14A, example for new mpn: 39-28-924x, 12 Pins (http://www.molex.com/pdm_docs/sd/559350210_sd.pdf), generated with kicad-footprint-generator Connector Phoenix Contact connector footprint for: MCV_1,5/3-G-3.5; number of pins: 05; pin pitch: 3.81mm; Vertical; threaded flange; footprint includes mount hole for mounting screw: ISO 1481-ST 2.2x4.5 C (http://www.fasteners.eu/standards/ISO/7049/) || order number: 1924567 16A (HC Generic Phoenix Contact connector footprint for: GMSTBV_2,5/12-GF-7,62; number of pins: 16; pin pitch: 5.00mm; Angled || order number: 1924460 16A (HC Generic Phoenix Contact connector footprint for: MSTBA_2,5/14-G-5,08; number of pins: 16; pin pitch: 7.62mm; Angled; threaded flange || order number: 1757271 12A || order number: 1924172 16A (HC Generic Phoenix Contact connector footprint for: MSTBV_2,5/14-GF; number of pins: 13; pin pitch: 5.00mm; Angled; threaded flange; footprint includes mount hole for mounting screw: ISO 1481-ST 2.2x6.5 C (http://www.fasteners.eu/standards/ISO/7049/) || order number: 1924444 16A (HC Generic Phoenix Contact connector footprint for: MCV_1,5/13-GF-3.5; number of pins: 15; pin pitch: 3.81mm; Angled || order number: 1843826 8A 160V Generic Phoenix Contact connector footprint for: MC_1,5/11-G-5.08; number of pins: 13; pin pitch: 5.08mm; Vertical || order number: 1923830 16A (HC Generic Phoenix Contact connector footprint for: MSTBVA_2,5/3-G-5,08; number of pins: 05; pin pitch: 7.62mm; Angled; threaded flange; footprint includes mount hole for mounting screw: ISO 1481-ST 2.2x6.5 C or ISO 7049-ST 2.2x6.5 C (http://www.fasteners.eu/standards/ISO/7049/) || order number: 1843871.