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BackMCP4725 (DAC). ** https://hkadesign.org.uk/monotronkb.html for 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 VCF MK's Diode Ladder VCF ~$8 in parts, depending on PCB Checkpoint after tweaking footprints some more, starting over at 14hp PCB initial layout, no traces "other_line_width": 0.15, PCB initial layout, no traces "silk_line_width": 0.15, PCB initial layout, no traces "other_line_width": 0.15, PCB initial layout, no traces "solder_mask_clearance": 0.0, PCB initial layout, no traces Using the Precision ADSR with modifications This is an ADSR envelope generator synth module. Layout and panel are Kosmo format. * [Schematic](Docs/precadsr.pdf) * PCB layout: [front](Docs/precadsr_layout_front.pdf), [back](Docs/precadsr_layout_back.pdf) * [BOM](Docs/precadsr_bom.md) * [Build notes](Docs/build.md) How to use your choice of 9 mm or 16 mm vertical board mount. Main MK_VCO/Panels/title_test.scad 40 lines default_label_font = "Futura Md BT:style=Medium"; label_font_size = 5; $fn=FN; /* [Panel] */ // Four hole threshold (HP cv_in = [first_col, fourth_row, 0]; //Fifth row interface placement triangle_out = [width_mm-h_margin-working_width/4, row_1, 0]; square_out = [output_column, bottom_row, 0]; fm_in = [first_col, fourth_row, 0]; triangle_out = [third_col, fourth_row, 0]; triangle_out = [third_col, fifth_row, 0]; pwm_duty = [width_mm - h_margin - working_width/8, row_3, 0]; cv_in_2b = [right_col, row_5, 0]; audio_out_1.
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