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More for ovals PCB layout: make power connection traces larger; MK uses a CA3080 OTA, an expensive and rare chip these days ($3/ea on amazon, maybe fakes) VCA MK's VCA Probably a straightforward build: one op-amp, four transistors and some example modules 811ef45c764021f623b8bb59234df1314fce4e91 12V, -12V and ground needed, probably up to it. For example, if a court judgment or allegation of patent infringement or for a little bit of margin $fn=FN; title_font = 10; // Number of faces on the https://www.onsemi.com/pub/Collateral/NCP115-D.PDF Panasonic HQFN-16, 4x4x0.85mm (https://industrial.panasonic.com/content/data/SC/ds/ds7/c0/PKG_HQFN016-A-0404XZL_EN.pdf Panasonic HSON-8, 8x8x1.25mm (https://industrial.panasonic.com/content/data/SC/ds/ds7/c0/PKG_HSON008-A-0808XXI_EN.pdf QFN, 12 Pin (https://www.nxp.com/docs/en/data-sheet/MMZ09332B.pdf), generated with kicad-footprint-generator JST ZE series connector, S24B-PHDSS (http://www.jst-mfg.com/product/pdf/eng/ePHD.pdf), generated with kicad-footprint-generator JST PHD horizontal JST XA series connector, 14110413010xxx (https://b2b.harting.com/files/download/PRD/PDF_TS/1411XX13010XXX_100228421DRW063C.pdf), generated with kicad-footprint-generator ipc_noLead_generator.py 10-Lead Plastic DFN (2mm x 2mm) (see Linear Technology DFN_10_05-08-1722.pdf DFN, 10 Pin (https://www.monolithicpower.com/pub/media/document/MPQ2483_r1.05.pdf), generated with kicad-footprint-generator Diode SMD 2512 (6332 Metric), 2.6mm thick, Vishay WKS2512, Terminal length (T) 1.19mm, 5 to 200 milli Ohm (http://http://www.vishay.com/docs/30108/wsk.pdf Shunt Resistor SMD 01005 (0402 Metric), square (rectangular) end terminal, IPC_7351 nominal, (Body size source: IPC-SM-782 page 72, https://www.pcb-3d.com/wordpress/wp-content/uploads/ipc-sm-782a_amendment_1_and_2.pdf), generated with kicad-footprint-generator Soldered wire connection, for 2 times 0.25 mm² wires, reinforced insulation, conductor diameter 0.4mm, outer diameter 3.9mm, size source Multi-Contact FLEXI-E 1.0 (https://ec.staubli.com/AcroFiles/Catalogues/TM_Cab-Main-11014119_(en)_hi.pdf), bend radius 3 times outer diameter, generated with kicad-footprint-generator Resistor SMD.

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