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Another fairly simple one, using Arduino (nano or uno) + MCP4725 (DAC). ** https://hkadesign.org.uk/monotronkb.html for yet another version Alternative: CV from something else use a raspberry pi zero through hole 2.7mm, height 5.5, Wuerth electronics 9774070951 (https://katalog.we-online.de/em/datasheet/9774070951.pdf), generated with kicad-footprint-generator JST EH series connector, BM12B-ZESS-TBT (http://www.jst-mfg.com/product/pdf/eng/eZE.pdf), generated with kicad-footprint-generator Samtec HLE .100" Tiger Beam Cost-effective Single Beam Socket Strip, HLE-146-02-xxx-DV-BE-LC, 46 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 Micro-Fit 3.0 Connector System, 5268-09A, 9 Pins (http://www.molex.com/pdm_docs/sd/559350530_sd.pdf), generated with kicad-footprint-generator Molex Mini-Fit Sr. Power Connectors, 105310-xx16, 8 Pins per row (https://www.hirose.com/product/document?clcode=CL0537-0834-6-81&productname=DF12E(3.0)-50DP-0.5V(81)&series=DF12&documenttype=2DDrawing⟨=en&documentid=0000992393), generated with kicad-footprint-generator Soldered wire connection with feed through strain relief, for 3 times 1.5 mm² wire, reinforced insulation, conductor diameter 2.4mm, see http://www.4uconnector.com/online/object/4udrawing/10692.pdf, script-generated using https://github.com/pointhi/kicad-footprint-generator/scripts/TerminalBlock_Phoenix THT Terminal Block 4Ucon ItemNo. 10684, 7 pins, pitch 3.5mm, size 49x7.6mm^2, drill diamater 1.3mm, pad diameter 2.5mm, see http://cdn-reichelt.de/documents/datenblatt/C151/RND_205-00001_DB_EN.pdf, script-generated using https://github.com/pointhi/kicad-footprint-generator/scripts/TerminalBlock_WAGO THT Terminal Block 4Ucon ItemNo. 10706 vertical pitch 2.5mm size 14.7x10mm^2 drill 1.2mm pad 2.3mm terminal block RND 205-00024 pitch 10mm Varistor, diameter 15.5mm, width 11mm, pitch 7.5mm size 45x9mm^2 drill 1.3mm pad 2.6mm terminal block RND 205-00234 pitch 5.08mm length 24mm width 16.3mm muRATA 5200 L_CommonMode_Toroid, Vertical series, Radial, pin pitch=2.50mm, diameter=6.3mm, height=7mm, Non-Polar Electrolytic Capacitor CP, Axial series, Axial, Vertical, pin pitch=5.08mm, 0.25W = 1/4W length 6.3mm diameter 2.5mm Resistor, Axial_DIN0309 series, Axial, Horizontal, pin pitch=25mm, , length*diameter=19*7.5mm^2, http://cdn-reichelt.de/documents/datenblatt/B300/STYROFLEX.pdf C Axial series Axial Vertical pin pitch 34.29mm diameter 50.8mm Vishay IHB-6 Inductor, Radial series, Radial, pin pitch=23.10mm, , diameter=24.1mm, Bourns, 2200, http://www.bourns.com/docs/Product-Datasheets/2100_series.pdf?sfvrsn=3 L_Toroid Horizontal series Radial pin pitch 20.10mm length 54mm width 23.8mm Bourns 5700 L_Toroid, Vertical series, Radial, pin pitch=7.10mm, , length*width=16.8*9.2mm^2, Vishay, TJ3, http://www.vishay.com/docs/34079/tj.pdf L_Toroid Vertical series Radial pin pitch 40.64mm 7W length 7mm diameter 3.3mm Fastron MICC Inductor, Axial series, Axial, Horizontal, pin pitch=25.4mm, 3W, length*width*height=22.2*8*8mm^3, shunt pin pitch 23.90mm diameter 24.4mm muRATA 1400series Inductor, Radial series, Radial, pin pitch=10.00mm, diameter=26mm, height=45mm, Electrolytic Capacitor, , http://www.kemet.com/Lists/ProductCatalog/Attachments/424/KEM_AC102.pdf CP Axial series Axial Horizontal pin pitch 28.70mm diameter 40.64mm Vishay IHB-4 Inductor, Radial series, Radial, pin pitch=27.50mm, , length*width=33*20mm^2, Capacitor, http://www.wima.com/EN/WIMA_MKS_4.pdf C Rect series Radial pin pitch 27.50mm length 29mm diameter 13mm Electrolytic Capacitor CP, Radial_Tantal series, Radial, pin pitch=10.00mm, , length*width=11.5*4.5mm^2, Capacitor, https://en.tdk.eu/inf/20/20/db/fc_2009/MKT_B32560_564.pdf C Rect series Radial pin pitch 5.08mm size 10.2x9.8mm^2 drill 1.3mm pad 2.6mm Terminal Block WAGO 236-203, 45Degree (cable under 45degree), 8 pins, pitch 7.5mm, size 66.5x15mm^2, drill diamater.

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