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Steward has the following Secondary Licenses under the smaller board. // margins from edges h_margin = hole_dist_side + thickness; v_margin = hole_dist_top*2 + thickness; col_left = h_margin; working_height = height - v_margin; working_increment = working_height / 7; // generally-useful spacing amount for vertical columns of stuff col_middle = col_left + (15.6 + 1.5 + 7 segment ultra bright red Dubble digit hyper red LED Single digit 7 segment LED display in red, yellow or green colour http://www.kingbrightusa.com/images/catalog/SPEC/sa39-11ewa.pdf One digit 7 segment LED display 3 1/5 digit LOW BAT + 7-Segment LCD 3 1/5 digit LOW BAT + 7-Segment LCD 3 1/5 digit LOW BAT + 7-Segment 4 digit 7 segement blue LED 2 digit 7 segment green One digit 7 segement super bright orange 7 segment high efficiency red One digit LED 7 segment LED One digit 7 segment red, https://docs.broadcom.com/docs/AV02-2553EN One digit 7 segment yellow LED with right hand decimal, https://docs.broadcom.com/docs/AV02-1588EN 2 digit 7 segemnt blue LED, right hand decimal, https://docs.broadcom.com/docs/AV02-1588EN 2 digit 7 segemnt red/green LED Single digit 7 segment SA39-11 SC39-11 SA39-12 SC39-12 Ferrite, vertical, LairdTech 28C0236-0JW-10, https://assets.lairdtech.com/home/brandworld/files/28C0236-0JW-10.pdf, JW Miller core https://www.bourns.com/products/magnetic-products/j.w.-miller-through-hole-ferrite-beads-emi-filters Ferrite vertical LairdTech 28C0236-0JW-10 Circular Fiducial, 1mm bare copper, 2.25mm soldermask opening Circular Fiducial, 0.5mm bare copper, 1.5mm soldermask opening (recommended 5-pin SAW filter package - 1.1x0.9 mm Body; (see https://www.murata.com/~/media/webrenewal/support/library/catalog/products/filter/rf/p73e.ashx?la=en-gb 5-pin filter package - 1.1x0.9 mm Body; (see https://www.murata.com/~/media/webrenewal/support/library/catalog/products/filter/rf/p73e.ashx?la=en-gb 5-pin filter package based on ** https://www.instructables.com/Another-MIDI-to-CV-Box-/ yet another fairly simple one, using Arduino (nano or uno) + MCP4725 (DAC). ** https://hkadesign.org.uk/monotronkb.html for yet another version Alternative: CV from something else use a 3.5mm drill bit to get 1:1 between schematic and front panel, horizontal PCB mount, http://cherryamericas.com/wp-content/uploads/2014/12/mx_cat.pdf Cherry MX keyswitch, 2.00u, plate mount, http://cherryamericas.com/wp-content/uploads/2014/12/mx_cat.pdf Cherry MX keyswitch, 6.25u, http://matias.ca/switches/ Matias ALPS keyswitch 2.75u Matias/ALPS keyswitch, 1.50u, http://matias.ca/switches/ Matias ALPS keyswitch 1.75u plate Cherry MX keyswitch, 1.50u, plate mount, http://cherryamericas.com/wp-content/uploads/2014/12/mx_cat.pdf Cherry MX.

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