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Main ENV/.gitignore 32 lines main MK_VCO/Panels/FireballSpell.dxf 25135 lines 72 65 73 0 40 Y N 1 F N DEF SW_Coded_SH-7010 SW 0 40 Y N 1 F N DEF LM3900N U 0 40 Y N 1 F N DEF SW_SPST_Temperature SW 0 40 Y N 1 F P Hardware/Panel/precadsr-panel/precadsr-panel-rescue.kicad_sym Normal file View File Align panel to integer pseudo-origin, remove testing text, decrease title label font so we don't need to mess with them. // this is the main (cylindrical or conical) knob shape, without the two RENDER hooks. * These work in progress; better README to come soon. Meanwhile: **Untested hardware and software — Do not connect the Normal pin for op amp in schmidt inverter mode, maybe both 7808 and hex inverter trigger are unnecessary? 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 mid surdos. Https://www.youtube.com/watch?v=-2No01KfY4k https://youtu.be/Jeh8iTI6gMc?t=96 https://youtu.be/frLXzG9-W3Q?t=712 (until 15:50 Key: REP: repique CAX: caixa MSD: mid surdo (sometimes MS1, MS2, etc, if multiple measures or has planned variations) BSD: back surdo (L for low, H for high R/L: Accented Note (right/left hand suggested) r/l: quieter note * : trill, generally three very fast notes on updating the fireball for rev 2 beta by adding +5V, and both trigger/gate and CV on the mid surdos. Examples Didá, on the GitHub page (they'll have "@ something" after them) and download them as separate sheet ## Photos ### Photos ## Documentation: ### Documentation: * [Schematic](Docs/precadsr.pdf) * PCB layout: [front](Docs/precadsr_layout_front.pdf), [back](Docs/precadsr_layout_back.pdf * [How to use](Docs/use.md 96f746fa2d Final tweaks, version submitted to JLCPCB on 20240124 Final tweaks, version submitted to JLCPCB.

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