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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 SIP7, http://power.murata.com/data/power/ncl/kdc_nma.pdf Isolated 1W single output POE DCDC-Converter, 60W POE, Silvertel, pitch 2.54mm, package size 69.98x30x15.64mm, https://silvertel.com/images/datasheets/Ag5810-datasheet-IEEE802_3bt-Power-over-Ethernet-4-pair-PD.pdf DCDC-Converter Silvertel Ag5810 single output POE DCDC-Converter, 60W POE, Silvertel, pitch 2.54mm, size 5.54x6.5mm^2, drill diamater 1.3mm, pad diameter 2.6mm, see http://www.farnell.com/datasheets/2138224.pdf, script-generated using https://github.com/pointhi/kicad-footprint-generator/scripts/TerminalBlock_4Ucon THT Terminal Block Phoenix MKDS-1,5-10 pitch 5mm size 50x10mm^2 drill 1.3mm pad 2.5mm terminal block RND 205-00056 45Degree pitch 5mm Varistor, diameter 15.5mm, width 4.9mm, pitch 5mm size 20x9.8mm^2 drill 1.3mm pad 2.5mm terminal block Metz Connect Type101_RT01602HBWC pitch 5.08mm size 20.3x11.2mm^2 drill 1.3mm pad 2.6mm Terminal Block WAGO 804-308 45Degree pitch 7.5mm Varistor, diameter 21.5mm, width 7.1mm, pitch 10mm size 45x9mm^2 drill 1.3mm pad 2.6mm Terminal Block WAGO 236-108 45Degree pitch 5mm size 30x10.5mm^2 drill 1.4mm pad 2.6mm Terminal Block Phoenix PT-1,5-6-5.0-H pitch 5mm size 11.5x15mm^2 drill 1.2mm pad 2.4mm Terminal Block WAGO 236-505, 45Degree (cable under 45degree), 8 pins, pitch 3.5mm, 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 SHL series connector, 502494-0370 (http://www.molex.com/pdm_docs/sd/5024940270_sd.pdf), generated with kicad-footprint-generator ipc_gullwing_generator.py LQFP, 176 Pin (https://www.onsemi.com/pub/Collateral/566DB.PDF), generated with kicad-footprint-generator Molex SPOX Connector System.

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