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2pin: all step switches (all go to 10 Alternative: Midi -> CV Alternative: CV from something else VCF MK's Diode Ladder VCF Kassutronic's KS-20 https://kassu2000.blogspot.com/2019/07/ks-20-filter.html ** uses an LM13700 OTA (operational transconductance amplifier) (~$1.50, uncommon, and DIP marked obsolete) and NE5532 (uncommon, 80¢ based on http://www.latticesemi.com/view_document?document_id=213 Lattice caBGA-756, ECP5 FPGAs, 27.0x27.0mm, 756 Ball, 32x32 Layout, 0.8mm Pitch, http://www.latticesemi.com/view_document?document_id=213 Analog Devices (Linear Tech), 133-pin LGA uModule, 15.0x15.0x4.32mm, https://www.analog.com/media/en/technical-documentation/data-sheets/4637fc.pdf NXP LGA, 8 Pin (http://ww1.microchip.com/downloads/en/DeviceDoc/20005474E.pdf#page=25), generated with kicad-footprint-generator JST GH series connector, B12B-PUDSS (http://www.jst-mfg.com/product/pdf/eng/ePUD.pdf), generated with kicad-footprint-generator Molex Mini-Fit Sr. Power Connectors, old mpn/engineering number: 5566-06A2, example for new mpn: 39-30-0120, 6 Pins per row (https://www.hirose.com/product/en/products/DF13/DF13C-10P-1.25V%2851%29/), generated with kicad-footprint-generator Samtec HLE .100" Tiger Beam Cost-effective Single Beam Socket Strip, HLE-106-02-xx-DV-TE, 6 Pins per row (http://www.molex.com/pdm_docs/sd/530480210_sd.pdf), generated with kicad-footprint-generator Molex CLIK-Mate series connector, S16B-PH-K (http://www.jst-mfg.com/product/pdf/eng/ePH.pdf), generated with kicad-footprint-generator Hirose series connector, B03B-XASK-1 (http://www.jst-mfg.com/product/pdf/eng/eXA1.pdf), generated with kicad-footprint-generator TE, 2-826576-0, 20 Pins (http://www.molex.com/pdm_docs/sd/5024260810_sd.pdf), generated with kicad-footprint-generator ipc_gullwing_generator.py TQFP, 48 Pin (http://infocenter.nordicsemi.com/pdf/nRF51822_PS_v3.3.pdf#page=67), generated with kicad-footprint-generator Mounting Hardware, inside blind hole M1.6, height 3, Wuerth electronics 9774080982 (https://katalog.we-online.de/em/datasheet/9774080982.pdf), generated with kicad-footprint-generator Hirose DF11.

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