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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 and Dual Output, 1500VDC Isolation, 19.0x17.0x8.7mm https://www.xppower.com/Portals/0/pdfs/SF_ISU02.pdf DCDC SMD XP POWER ISU02 XP_POWER ITQxxxxS-H, SIP, (https://www.xppower.com/pdfs/SF_ITQ.pdf), generated with kicad-footprint-generator connector wire 1sqmm double-strain-relief Soldered wire connection with double feed through strain relief, for 2 times 0.75 mm² wires, reinforced insulation, conductor diameter 2.4mm, see , script-generated with , script-generated using https://github.com/pointhi/kicad-footprint-generator/scripts/TerminalBlock_Phoenix THT Terminal Block WAGO 804-302 45Degree pitch 5mm size 40x9.8mm^2 drill 1.3mm pad 2.5mm terminal block RND 205-00245, 6 pins, http://www.lodestonepacific.com/CatKpdf/VTM950-6.pdf Inductor, Radial series, Radial, pin pitch=14.70mm, , diameter=16.8mm, Vishay, TJ3, BigPads, http://www.vishay.com/docs/34079/tj.pdf L_Toroid Vertical series Radial pin pitch 7.50mm length 9mm diameter 8mm Fastron 77A Inductor, Axial series, Axial, Horizontal, pin pitch=25mm, , length*diameter=19*8.0mm^2, http://cdn-reichelt.de/documents/datenblatt/B300/STYROFLEX.pdf C Axial series Axial Vertical pin pitch 60mm length 55mm diameter 35.0mm Electrolytic Capacitor CP, Radial series, Radial, pin pitch=5.30mm, , length*width=14*5.6mm^2, Bourns, 5700, http://www.bourns.com/docs/Product-Datasheets/5700_series.pdf L_Toroid Vertical series Radial pin pitch 7.50mm diameter 16mm Electrolytic Capacitor C Rect series Radial pin pitch 20.32mm 2W length 11.9mm diameter 4.5mm Resistor, Axial_DIN0414 series, Axial, Horizontal, pin pitch=75mm, , length*diameter=67*32.0mm^2, Electrolytic Capacitor, , http://www.vishay.com/docs/28325/021asm.pdf CP Axial series Axial Horizontal pin pitch 7.62mm length 5.2mm diameter 2.7mm Diode, DO-41_SOD81 series, Axial, Horizontal, pin pitch=20.32mm, 2W, length*diameter=17*6mm^2, http://www.vishay.com/docs/20128/wkxwrx.pdf Resistor Axial_DIN0414 series Axial Horizontal pin pitch 10mm size 12.3x14mm^2 drill 1.15mm pad 3mm Terminal Block 4Ucon ItemNo. 10688 pitch 3.5mm size 21.7x7mm^2 drill 1.2mm pad 2.4mm Terminal Block WAGO 236-202, 45Degree (cable under 45degree), 9 pins, pitch 3.5mm, size 11.2x7mm^2, drill diamater 1.3mm, pad diameter 2.5mm, see http://cdn-reichelt.de/documents/datenblatt/C151/RND_205-00023_DB_EN.pdf, script-generated using https://github.com/pointhi/kicad-footprint-generator/scripts/TerminalBlock_RND THT terminal block connector http://www.phoenixcontact.com/us/products/1778719/pdf PhoenixContact PTSM0,5 2 2,5mm vertical SMD spring clamp terminal block Metz Connect Type171_RT13705HBWC, 5 pins, pitch 3.5mm, size 18.2x7mm^2, drill diamater 1.1mm, pad diameter 2.5mm, see http://cdn-reichelt.de/documents/datenblatt/C151/RND_205-00067_DB_EN.pdf, script-generated using https://github.com/pointhi/kicad-footprint-generator/scripts/TerminalBlock_RND THT terminal block connector http://www.phoenixcontact.com/us/products/1814728/pdf PhoenixContact PTSM0.5 6 2.5mm vertical SMD spring clamp terminal block RND 205-00304 pitch 10mm size 55x10.3mm^2 drill 1.3mm pad 2.6mm Terminal Block WAGO 804-324, 45Degree (cable under 45degree), 7 pins, pitch 2.54mm, hole diameter 1.1mm, length 10.2mm, width 3.5mm Capacitor C, Rect series, Radial, pin pitch=20.07mm, , diameter=27.9mm, Vishay, IHB-3, http://www.vishay.com/docs/34015/ihb.pdf Inductor Radial series Radial pin pitch 25mm length 18mm width 7mm Capacitor C, Disc series, Radial, pin pitch=2.50mm, , diameter=4.5mm, Tantal Electrolytic Capacitor C Rect series Radial.

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