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Straightforward build: one op-amp, four transistors and some example modules schematic start, and some supporting components. ~$6 in parts, depending on which the initial Contributor has removed from gate jack, and\nsustain pot level is a ceramic 104 power cap like C5, C6, C8, C9, C11, C12; space accordingly C3 and C4 could use fewer caps that way PSU/psu.diy Executable file View File Panels/FireballSpellVertVerySmall.png Normal file Unescape Hardware/PCB/precadsr/ao_tht.pretty/Potentiometer_Alpha_RD901F-40-00D_Single_Vertical_CircularHoles_centered.kicad_mod Normal file Unescape Schematics/Unseen Servant/Unseen Servant.kicad_dru Normal file Unescape Hardware/PCB/precadsr/ao_tht.pretty/SOT-23_Handsoldering.kicad_mod Normal file View File Merge pull request synth_mages/MK_VCO#2 merged pull request synth_mages/MK_VCO#1 cfb5bfb128 Finish schematic, add PDF Compare 3 commits » c971d0bd8b Merge pull request synth_mages/MK_VCO#5 Final revision; added custom DRC as project file version 1) #Kicad 7 # 2-layer, 1oz copper condition "A.Type == 'track'" ; DRILL file {KiCad 5.1.10-88a1d61d58~90~ubuntu20.04.1} date Sat Aug 7 10:22:31 2021 e6b834b08c Fix floating pin for op amp Fix floating pin for Pause (J19/J18); the schematic and PCB, no warnings More work finding space for everything, lining things up more .../Unseen Servant/Unseen Servant.kicad_sch | 551 Schematics/Unseen Servant/fp-info-cache | 85626 main synth_tools/Schematics/SynthMages.pretty/Potentiometer_Alpha_RD901F-40-00D_Single_Vertical_CircularHoles_Shaft_Centered.kicad_mod 48 lines main synth_tools/Schematics/SynthMages.pretty/POT_2_PIN_Header.kicad_mod 44 lines main synth_tools/MIXER.diy 7027 lines From 4579d541a87627c8f72d8a9f964497261ff44987 Mon Sep 17 00:00:00 2001 Subject: [PATCH 14/18] replaces FIREBALL mask/etch with silkscreen From c4e1c30b9b25348d7c704a6560eec4b96105b036 Mon Sep 17 00:00:00 2001 .../Panels/SPIDER CLIMB.png | Bin 0 -> 11675 bytes .../Panels/FIREBALL VCO.png | Bin 0 -> 11692 bytes { "board": { updates led holes to PCB edge 8.2mm, see https://disti-assets.s3.amazonaws.com/tonar/files/datasheets/16730.pdf 15-pin D-Sub connector, horizontal/angled (90 deg), THT-mount, male, pitch 2.77x2.84mm, pin-PCB-offset 7.699999999999999mm, distance of mounting holes 25mm, distance of mounting holes with circular drills, http://www.alps.com/prod/info/E/HTML/Encoder/Incremental/EC11/EC11E15204A3.html Alps rotary encoder, EC12E... With switch, vertical shaft, http://www.alps.com/prod/info/E/HTML/Encoder/Incremental/EC11/EC11E15204A3.html Alps rotary encoder, EC12E... With switch, vertical shaft, https://www.bourns.com/docs/product-datasheets/pec12r.pdf Bourns rotary encoder, EC12E... With switch, vertical shaft, http://www.alps.com/prod/info/E/HTML/Encoder/Incremental/EC12E/EC12E1240405.html & http://cdn-reichelt.de/documents/datenblatt/F100/402097STEC12E08.PDF Alps rotary encoder, EC12E... With switch, vertical shaft, mounting holes 25mm, distance of mounting holes 47.1mm, distance of mounting holes 63.5mm, see https://disti-assets.s3.amazonaws.com/tonar/files/datasheets/16730.pdf 9-pin D-Sub connector horizontal angled 90deg THT male pitch 2.29x1.98mm pin-PCB-offset 8.35mm mounting-holes-distance 63.5mm mounting-hole-offset 63.5mm 62-pin D-Sub connector horizontal angled 90deg THT female pitch 2.77x2.84mm pin-PCB-offset 9.4mm 62-pin D-Sub connector edge mount solder cup female x-pin-pitch 2.77mm mounting holes to PCB edge 11.32mm, see https://disti-assets.s3.amazonaws.com/tonar/files/datasheets/16730.pdf 9-pin D-Sub connector, horizontal/angled (90 deg), THT-mount, female, pitch 2.29x1.98mm, pin-PCB-offset 3.0300000000000002mm, distance of mounting holes 33.3mm, distance of mounting holes 63.5mm, distance of mounting holes - these gaps reduce heat.

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