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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 or 2W Single Output SM DC/DC Converters https://www.murata.com/products/productdata/8807031865374/kdc-nxe1.pdf#page=8 https://www.murata.com/products/productdata/8807031898142/kdc-nxe2.pdf#page=9 Isolated 1W single output Power Module uPOL MUN12AD01 Power Module uPOL MUN12AD03 Meanwell DCDC non-isolated converter SIP module, http://www.meanwell.com/webapp/product/search.aspx?prod=nid30 Isolated 1W single output POE DCDC-Converter TRACO THN 10 to 30W, Single or dual Output, (https://www.tracopower.com/sites/default/files/products/datasheets/thn30_datasheet.pdf DCDC-Converter TRACO TMRxxxxWI Single/Dual_output DCDC-Converter, TRACO, TSR 1-xxxx XP_POWER IA48xxD, DIP, (https://www.xppower.com/pdfs/SF_IA.pdf), generated with kicad-footprint-generator Hirose DF13C SMD, CL535-0415-4-51, 15 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 PicoBlade series connector, LY20-40P-DT1, 20 Circuits (https://www.molex.com/pdm_docs/sd/2005280200_sd.pdf), generated with kicad-footprint-generator JST GH series connector, SM03B-ZESS-TB (http://www.jst-mfg.com/product/pdf/eng/eZE.pdf), generated with kicad-footprint-generator Molex SPOX Connector System, 5268-15A, 15 Pins (http://www.molex.com/pdm_docs/sd/559350530_sd.pdf), generated with kicad-footprint-generator Samtec HLE .100" Tiger Beam Cost-effective Single Beam Socket Strip, HLE-111-02-xxx-DV-BE-A, 11 Pins (http://www.molex.com/pdm_docs/sd/559320210_sd.pdf.

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