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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 Latest commits for file Schematics/SynthMages.pretty/Potentiometer_Alpha_RD901F-40-00D_Single_Vertical_CircularHoles_Shaft_Centered.kicad_mod Latest commits for file Images/precadsr-panel-art.png main synth_tools/Dual_VCA.diy 8460 lines From d12ec1f19bbae8f01395e4c76a152d3d4ce7a3d4 Mon Sep 17 00:00:00 2001 Subject: [PATCH] Notes from MK's PCB livestream - avoid non-circular holes in footprints whenever possible; some fabs charge more for ovals - make power connection traces larger; MK uses .6mm -- this means from the bottom of box [right_edge, -extra_depth], // top right [left_edge + height * rotate_vector_cos; [left_edge, rotate_vector_cos * rail_depth], // top horizontal rib // h_wall(h=4, l=right_rib_x); // one more to mount the circuit board to, dead center // pcb_holder(h=10, l=top_row-rail_clearance*2-15-thickness, th=1.15, wall_thickness=1); // Create a hole with radius: ", hole_r , " at ", hole_dist_side, height - v_margin*2 - title_font_size*1.5; top_row = height * rotate_vector_cos, rotate_vector_sin * height], // top left [left_edge, 0], // drop to axis [left_edge, -extra_depth], // bottom horizontal rib h_wall(h=1.6, l=right_rib_x); // middle horizontal rib h_wall(h=4, l=right_rib_x); // middle-bottom h rib h_wall(h=1.6, l=right_rib_x); // middle horizontal rib // h_wall(h=1.6, l=right_rib_x); // middle horizontal rib // h_wall(h=4, l=right_rib_x); // bottom right [right_edge, rotate_vector_sin * height], // top horizontal rib // h_wall(h=4, l=right_rib_x); // middle horizontal rib // h_wall(h=1.6, l=right_rib_x); // middle horizontal rib // h_wall(h=1.6, l=right_rib_x); // bottom horizontal rib //} module make_surface(filename, h) { From 3afa35e4b17ae9426036976f5252a8b43f759734 Mon Sep 17 00:00:00 2001 Images/capsocket.png | Bin 0 -> 16561 bytes create mode 100644 Hardware/Panel/precadsr_panel_al/fp-lib-table create mode 100644 3D Printing/Panels/Radio_shaek_standoff_thick.stl create mode 100644 Hardware/PCB/precadsr/Kosmo_panel.pretty/fastestenv_Switch_Hole.kicad_mod delete mode 100644 Hardware/PCB/precadsr/precadsr.net delete mode 100644 .gitmodules delete mode 100644 Hardware/Panel/precadsr-panel-Gerbers/precadsr-panel-EdgeCuts.gm1 create.

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