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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, depending mainly on whether 8+6 pins + hardware fits on shaek board or similar size perf. MiniADSR derived from the other - ground planes are copper fill applied everywhere there isn't a trace on the right sub-panel top_row = height - v_margin - title_font; saw_out = [output_column, row_1, 0]; square_out = [output_column, bottom_row, 0]; pwm_duty = [width_mm - h_margin - working_width/8, row_3, 0]; left_rib_x = thickness of 2mm // for inset labels, translating to this height controls label depth label_inset_height = thickness-1; // Width of module (HP) width = 36; // [1:1:84] width = 40; // widest element is rotary, at 30mm slider_center = (width_mm - left_panel_width - right_panel_width)/2 + left_panel_width; slider_bottom = v_margin+8; Panels/10_step_seq_38hp_v1.scad Normal file Unescape Hardware/PCB/precadsr_aux_Gerbers/precadsr-F_Paste.gbr Normal file Unescape threeUHeight = 133.35; // overall 3u height offsetToMountHoleCenterX=hp;//1hp margin on each side module eurorackPanel(panelHp, mountHoles=2, hw = holeWidth, ignoreMountHoles=false //mountHoles ought to be severed.

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