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Compare to online 8-note schematic, or extend MK's 5-note to 8-note. Expanding out to 8 notes means ~$16-20 in parts, depending on which are actually 2p6t, which means only six different step counts are available until the replacement arrives - Wiring SW15 (once/stop) and cascade out is easier done via skywiring; only one tl074 and support components, so tiny PCB should be 1. // @todo Calculate the convexity values based on http://www.latticesemi.com/view_document?document_id=213 BGA 0.8mm 9mm 121 BGA-132 11x17 12x18mm 1.0pitch Altera BGA-144 M144 MBGA Altera VBGA V81 BGA-81 Altera BGA-100 M100 MBGA 121-ball, 0.8mm BGA (based on standard DIP-4), row spacing 7.62 mm (300 mils), see https://ac-dc.power.com/sites/default/files/product-docs/tinyswitch-iii_family_datasheet.pdf PowerIntegrations variant of TO-92), also known as TO-226, wide, drill 0.75mm (http://www.produktinfo.conrad.com/datenblaetter/175000-199999/181293-da-01-de-TO92_Temperatursensor_PT1000_32209225.pdf Molded Japan Transistor Package 7x4x9mm^3, http://rtellason.com/transdata/2sb734.pdf Non Isolated Modified TO-220 7pin Package, see http://www.farnell.com/datasheets/5793.pdf Power Integration Y Package SIPAK, Horizontal, RM 1.7mm, IIPAK, I2PAK, see http://www.onsemi.com/pub/Collateral/EN8586-D.PDF TO-262-3 Vertical RM 0.9mm staggered type-2 TO-220-4 Vertical RM 3.81mm Potentiometer, vertical, Bourns 3314J, http://www.bourns.com/docs/Product-Datasheets/3314.pdf Potentiometer, vertical, Piher PT-15-V02, http://www.piher-nacesa.com/pdf/14-PT15v03.pdf Potentiometer vertical Piher PT-15-V15 Potentiometer, horizontal, Bourns 3386C, https://www.bourns.com/pdfs/3386.pdf Potentiometer vertical Bourns 3266W Potentiometer, horizontal, Alps RK163 Dual 1110U1Q 1110TNP 1110U2A 1110U0Q Potentiometer, horizontal, Bourns 3266P, https://www.bourns.com/docs/Product-Datasheets/3266.pdf Potentiometer vertical Bourns 3314J Potentiometer, vertical, Bourns 3296Y, https://www.bourns.com/pdfs/3296.pdf Potentiometer vertical Alps RK09K RK09D Single Snapin 113004U 1130A6S 11300DR 1130A8G 1130081 1130A5R 1130AP5 1130AST D1130C3W D1130C1B D1130C3C D1130C2P Potentiometer, vertical, Omeg PC16BU, http://www.omeg.co.uk/pc6bubrc.htm Potentiometer horizontal Vishay 148E-149E Dual Potentiometer, horizontal, Bourns 3314S, http://www.bourns.com/docs/Product-Datasheets/3314.pdf Potentiometer horizontal Bourns 3296Z Potentiometer, horizontal, Alps RK09L Single, https://tech.alpsalpine.com/prod/e/pdf/potentiometer/rotarypotentiometers/rk09l/rk09l.pdf Potentiometer horizontal Piher PT-10-H05 Potentiometer, vertical, Bourns 3214X, https://www.bourns.com/docs/Product-Datasheets/3214.pdf Potentiometer horizontal ACP CA9-H5 Potentiometer, vertical, Bourns 3214W, https://www.bourns.com/docs/Product-Datasheets/3214.pdf Potentiometer horizontal Vishay 148-149 Single, http://www.vishay.com/docs/57040/148149.pdf Potentiometer vertical Vishay 248GJ-249GJ Single, http://www.vishay.com/docs/57054/248249.pdf Potentiometer horizontal Alps RK09L Double, https://tech.alpsalpine.com/prod/e/pdf/potentiometer/rotarypotentiometers/rk09l/rk09l.pdf Potentiometer vertical Bourns 3266Y Potentiometer, horizontal, Bourns 3005, http://www.bourns.com/docs/Product-Datasheets/3005.pdf Potentiometer horizontal Bourns 3214G Potentiometer, horizontal, ACP CA9-H3,8, http://www.acptechnologies.com/wp-content/uploads/2017/05/02-ACP-CA9-CE9.pdf Potentiometer horizontal Alps RK097 Single, https://tech.alpsalpine.com/prod/e/pdf/potentiometer/rotarypotentiometers/rk097/rk097.pdf Potentiometer horizontal Vishay 43 Potentiometer, horizontal, Alps RK09L Single 1140A5L 114001E 1140A2U.

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