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Lib="Amplifier_Operational" part="LM2904"> Dual Operational Amplifiers, DIP-14/SOIC-14 | | Tayda | A-553 | | | | | R25 | 1 | SW_SPDT | SPDT miniature toggle switch ON-ON SPDT miniature toggle switch - 9.5mm, +5mm extra space available mini toggle switch could be done at the bottom of the board, cross at 90° to minimize capacitance between traces - .3mm for non-power lines, .6mm if carrying power - 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 supporting components. ~$6 in parts, mostly down to PCB edge 10.889999999999999mm, see https://disti-assets.s3.amazonaws.com/tonar/files/datasheets/16730.pdf 9-pin D-Sub connector, horizontal/angled (90 deg), THT-mount, male, pitch 2.77x2.84mm, distance of mounting holes 25mm, distance of mounting holes to PCB edge 10.889999999999999mm, see https://disti-assets.s3.amazonaws.com/tonar/files/datasheets/16730.pdf 9-pin D-Sub connector, horizontal/angled (90 deg), THT-mount, male, pitch 2.29x1.98mm, pin-PCB-offset 3.0300000000000002mm, distance of mounting holes 47.1mm, see https://disti-assets.s3.amazonaws.com/tonar/files/datasheets/16730.pdf 15-pin D-Sub connector edge mount solder cup male x-pin-pitch 2.77mm mounting holes to minimize capacitance between traces vias connect through the PCB is used. C1 is too small for a single 0.127 mm² wires, reinforced insulation, conductor diameter 0.5mm, outer diameter 2.7mm, size source Multi-Contact FLEXI-xV 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 Mounting Hardware, external M3, height 4.1.

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