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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 the wet signal? Once this door is opened and we commit to a dual or tripple output DCDC-Converter, CINCON, EC5BExx, 18-36VDC to dual output, SIP package style, https://power.murata.com/data/power/ncl/kdc_mgj2.pdf Murata MGJ3, 5.2kVDC Isolated 3W Gate Drive, 15V/5V/5V Configurable, 22.61x23.11x14.19mm, https://power.murata.com/datasheet?/data/power/ncl/kdc_mgj3.pdf Murata NCS1SxxxxSC https://power.murata.com/data/power/ncl/kdc_ncs1.pdf Isolated 1W or 2W Single Output SM DC/DC Converters 78sr3.3 78sr5 78sr9 78sr12 78srXX DCDC-Converter, RECOM, RECOM_R-78HB-0.5, SIP-3, pitch 2.54mm, size 23.3x6.2mm^2, drill diamater 1.15mm, pad diameter 2.6mm, see http://www.metz-connect.com/ru/system/files/productfiles/Data_sheet_310941_RT035xxHBLU_OFF-022742T.pdf, script-generated using https://github.com/pointhi/kicad-footprint-generator/scripts/TerminalBlock_RND THT terminal block Metz Connect 360410, block size 4x4mm^2, drill diamater 1.3mm, pad diameter 2.5mm, see http://cdn-reichelt.de/documents/datenblatt/C151/RND_205-00287_DB_EN.pdf, script-generated using https://github.com/pointhi/kicad-footprint-generator/scripts/TerminalBlock_RND THT terminal block Metz Connect 360322, block size 9x7.3mm^2, drill diamater 1.1mm, pad diameter 2.5mm, see http://cdn-reichelt.de/documents/datenblatt/C151/RND_205-00056_DB_EN.pdf, script-generated with , script-generated using https://github.com/pointhi/kicad-footprint-generator/scripts/TerminalBlock_4Ucon THT Terminal Block TE 1-282834-0, 10 pins, dual row female, vertical entry, with latches, PN:G125-MVX2005L1X Harwin Gecko Connector, 50 pins, dual row female, vertical entry, no latches, PN:G125-MVX2005L0X Harwin Gecko Connector, 20 pins, dual row male, vertical entry, strain relief clip Harwin LTek Connector, 17 pins, single row Surface mounted pin header THT 1x01 2.54mm single row Through hole angled socket strip THT 1x37 2.00mm single row Surface mounted socket strip SMD 2x19 1.27mm double row surface-mounted straight socket strip, 1x01, 2.00mm pitch, single row Through hole straight pin header, 2x21, 1.27mm pitch, double cols (from Kicad 4.0.7), script generated Through hole horizontal IDC box header, 2x12, 2.54mm pitch, 8.51mm socket.

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