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Https://www.ctscorp.com/wp-content/uploads/206-208.pdf E-Switch slide switch, EG series, DPDT, http://spec_sheets.e-switch.com/specs/P040047.pdf E-Switch slide switch, EG series, SPDT, right angle, http://www.ckswitches.com/media/1422/js.pdf CuK miniature slide switch, EG series, DPDT, right angle, http://www.ckswitches.com/media/1422/js.pdf CuK miniature slide switch, OS series, SPDT, https://www.e-switch.com/wp-content/uploads/2022/06/EG.pdf tactile switch, 7.3mm x 6.25mm package, pitch 0.8mm; see section 6.3 of http://www.st.com/resource/en/datasheet/stm32f469ni.pdf WLCSP-180, 13x14 raster, 5.537x6.095mm package, pitch 0.4mm; see section 7.1 of http://www.st.com/resource/en/datasheet/stm32f103tb.pdf LFBGA-144, 12x12 raster, 5.24x5.24mm package, pitch 0.4mm; see section 7.6 of http://www.st.com/resource/en/datasheet/stm32f446ze.pdf WLCSP-81, 9x9 raster, 4x4mm package, pitch 0.8mm; see section 7.4 of http://www.st.com/resource/en/datasheet/stm32f446ze.pdf UFBGA-144, 12x12 raster, 10x10mm package, pitch 0.4mm; see section 7.1 of http://www.st.com/resource/en/datasheet/stm32f401vc.pdf WLCSP-49, 7x7 raster, 3.417x3.151mm package, pitch 0.4mm; see section 7.4 of http://www.st.com/resource/en/datasheet/DM00366448.pdf WLCSP-168, 12x14 raster, 4.891x5.692mm package, pitch 0.4mm; see section 7.7 of http://www.st.com/resource/en/datasheet/DM00330506.pdf WLCSP-100, 10x10 raster, 4.775x5.041mm package, pitch 0.65mm WLP-4, 2x2 raster, 0.73x0.73mm package, pitch 0.4mm; see section 7.7 of http://www.st.com/resource/en/datasheet/DM00330506.pdf WLCSP-100, 10x10 raster, 4.201x4.663mm package, pitch 0.4mm; see section 7.5 of http://www.st.com/resource/en/datasheet/stm32f303r8.pdf WLCSP-49, 7x7 raster, 3.141x3.127mm package, pitch 0.4mm; http://www.fujitsu.com/global/documents/products/devices/semiconductor/fram/lineup/MB85RS1MT-DS501-00022-7v0-E.pdf Infineon LFBGA-292, 0.35mm pad, 17.0x17.0mm, 292 Ball, 20x20 Layout, 0.8mm Pitch, https://www.ti.com/lit/ml/mpbg777/mpbg777.pdf BGA 289 0.8 ZAV S-PBGA-N289 Texas Instruments, NDQ, 5 pin (https://www.ti.com/lit/ml/mmsf022/mmsf022.pdf TO-PMOD-11 11-pin switching regulator package, http://www.ti.com/lit/ml/mmsf025/mmsf025.pdf Vishay PowerPAK SC70 single transistor package http://www.vishay.com/docs/70486/70486.pdf TO-46-4 with Valox case, based on the top of the rail + a safety margin // margins from edges h_margin = hole_dist_side + thickness; working_height = height - v_margin; working_increment = working_height / 6; // Depth 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 example modules 811ef45c764021f623b8bb59234df1314fce4e91 12V, -12V and ground needed, probably up to 1amp - maybe not as efficient as a full circle. NOT IMPLEMENTED YET. Quality = "preview.

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