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BackBin 13962 -> 6771 bytes c852e5d6ad Go to file 007cc05932 Checkpoint after tweaking footprints some more, starting over at 14hp Added hard sync to schematic, laid out PCB with exploratory 8hp layout 0d370a24cdcaf6d3fd7f0316855522b79df0fe9a 3583986e89 Finished PCB, passes all passable DRCs created pull request 'More schematics' (#3) from schematic by Eeschema 5.1.10-88a1d61d58~90~ubuntu20.04.1 **Component Count:** 76 | Refs | Qty | Component | Description | Manufacturer | Part | Vendor | SKU | | R16, R18, R26 | 3 Hardware/Panel/precadsr-panel/fp-lib-table | 2 aoKicad | 2 Smaller cap (476nF?) for C1 - Ceramic 104s for C10, C14, might be fine, might introduce intermittents - Don't put R8 so close to R26 -- D36/R47 too close Testing before powering up: Clock In Normal - 1k to U2-8 (AND NOT short to U2-10 - Clock rate goes down when resistance goes up, opposite to expectation. Glide fix - CV Range - Once/Cont 11 Toggle Switches, 3pin: 11 Toggle Switches, 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 the left sub-panel right_rib_x = width_mm - h_margin; col_left = thickness + 6 + tolerance; rotate_vector_cos = 0.94; // 'x' of 20 degree rotation rotate_vector_sin = 0.34; // 'y' of rotation left_edge = -rotate_vector_sin * rail_depth; right_edge = height - v_margin*2 - title_font_size; working_increment = working_height / 6; // generally-useful spacing amount for vertical columns of stuff center_adjust = 2.5; rail_clearance = 9; set_screw_height = 4; quality_of_set_screw = 20; // [0:0%, 10:10%, 20:20%, 30:30%, 40:40%, 50:50%] // Width of module (HP) width = 36; // [1:1:84] fm_in = [first_col, first_row, 0]; c_tune = [second_col, first_row, 0]; sync_in = [first_col, fifth_row, 0]; pwm_duty = [width_mm - h_margin - working_width/8, row_4, 0]; pwm_cv_lvl = [width_mm - h_margin - working_width/8, row_3, 0]; c_tune = [width_mm/2.
- OPIC IS471F, see http://pdf.datasheetcatalog.com/datasheet/Sharp/mXvrzty.pdf Sharp OPIC, IS485, IS486.
- -7.79364 0 5.97318 vertex 7.64388.