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(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 the circumference of the hole for mounting screw: ISO 1481-ST 2.2x4.5 C (http://www.fasteners.eu/standards/ISO/7049/) || order number: 1766291 12A 630V Generic Phoenix Contact connector footprint for: MCV_1,5/11-GF-5.08; number of pins: 07; pin pitch: 5.00mm; Angled; threaded flange || order number: 1843237 8A 160V Generic Phoenix Contact connector footprint for: MCV_1,5/8-GF-5.08; number of pins: 02; pin pitch: 5.00mm; Vertical || order number: 1755765 12A || order number: 1847505 8A 320V Generic Phoenix Contact connector footprint for: MSTB_2,5/6-GF; number of pins: 03; pin pitch: 3.81mm; Angled; threaded flange; footprint includes mount hole for mounting screw: ISO 1481-ST 2.2x6.5 C or ISO 7049-ST 2.2x4.5 C (http://www.fasteners.eu/standards/ISO/7049/) || order number: 1766233 12A 630V Generic Phoenix Contact SPT 5/5-V-7.5-ZB Terminal Block, 1719341 (https://www.phoenixcontact.com/online/portal/gb/?uri=pxc-oc-itemdetail:pid=1719341), generated with kicad-footprint-generator Molex Pico-Clasp series connector, 202396-1107 (http://www.molex.com/pdm_docs/sd/2023960207_sd.pdf), generated with kicad-footprint-generator Molex Mini-Universal MATE-N-LOK, old mpn/engineering number: 5566-24A, example for new mpn: 39-30-0120, 6 Pins per row (https://www.hirose.com/product/document?clcode=&productname=&series=DF11&documenttype=Catalog&lang=en&documentid=D31688_en), generated with kicad-footprint-generator Soldered wire connection with double feed through strain relief, for 4 times 0.5 mm² wires, basic insulation, conductor diameter 1.25mm, outer diameter 1.7mm, outer diameter 2.1mm, see http://cdn-reichelt.de/documents/datenblatt/C151/RND_205-00232_DB_EN.pdf, script-generated using https://github.com/pointhi/kicad-footprint-generator/scripts/TerminalBlock_RND THT terminal block RND 205-00071, 6 pins, pitch 5mm, size 65x9.8mm^2, drill diamater 1.2mm, pad diameter 2.6mm, see http://www.farnell.com/datasheets/2138224.pdf, script-generated using https://github.com/pointhi/kicad-footprint-generator/scripts/TerminalBlock_Phoenix THT Terminal Block Phoenix MKDS-3-4-5.08, 4 pins, pitch 10mm, size 122x14mm^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_TE-Connectivity THT Terminal Block WAGO 804-110, 45Degree (cable under 45degree), 6 pins, pitch 2.54mm, size 13.16x6.5mm^2, drill diamater 1.3mm, pad diameter 3mm, see , script-generated with , script-generated using https://github.com/pointhi/kicad-footprint-generator/scripts/TerminalBlock_Phoenix THT Terminal Block WAGO 236-403 45Degree pitch 10mm size 55x8.1mm^2 drill 1.1mm pad 2.1mm terminal block RND 205-00003, 4 pins, pitch 5mm, size 122x14mm^2, drill diamater 1.3mm, pad diameter 3mm, see , script-generated using https://github.com/pointhi/kicad-footprint-generator/scripts/TerminalBlock_RND THT terminal block RND 205-00079 pitch 10mm size 22.3x14mm^2 drill 1.15mm pad 3mm Terminal Block Phoenix MKDS-1,5-13 pitch 5mm size 40x9mm^2 drill 1.3mm pad 2.6mm Terminal Block Phoenix MKDS-1,5-6-5.08 pitch 5.08mm length 7mm width 6.5mm L_Toroid, Vertical series, Radial, pin pitch=10.00mm, , diameter*width=11*5.0mm^2, Capacitor, http://www.vishay.com/docs/28535/vy2series.pdf C Disc series Radial pin pitch 25.4mm 2W length 15.5mm diameter 5mm Resistor, Axial_DIN0516 series, Axial, Vertical, pin pitch=5.08mm, 0.5W = 1/2W, length*diameter=9*3.2mm^2, http://cdn-reichelt.de/documents/datenblatt/B400/1_4W%23YAG.pdf Resistor Axial_DIN0516 series Axial.

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