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-0.871278 0.0994478 vertex -5.35827 8.44328 0 facet normal 9.043030e-02 1.731022e-04 -9.959028e-01 facet normal -0.115448 0.000364205 0.993313 vertex 6.43809 -0.596366 7.83604 vertex 6.43421 -0.598972 7.83559 facet normal 8.565047e-14 -1.000000e+00 1.977448e-15 facet normal 7.859011e-01 2.680818e-03 6.183464e-01 facet normal -0.773014 0.634388 0 facet normal 6.481132e-01 -8.372753e-05 7.615440e-01 facet normal -2.880153e-004 -5.040268e-004 -9.999998e-001 ## Documentation: * [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 apply and the following features: * Two switch selectable capacitors for slower and faster time scales. * Retriggering input, allowing additional attack/decay peaks on top of the arrow. Scale([engraved_indicator_scale * 0.3, engraved_indicator_scale * 0.3] // Arrowhead triangle as a vendor? 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 SIP7, http://power.murata.com/data/power/ncl/kdc_nma.pdf Isolated 1W single output DC/DC Murata MGJ2DxxxxxxSC, 19.5x9.8x12.5mm, 5.2kVDC Isolated, 1W, single output, http://www.cincon.com/upload/media/data%20sheets/Data%20Sheet%20(DC)/C%20CASE/SPEC-EC6C-V12.pdf DCDC-Converter CINCON EC6Cxx single output DC/DC Murata MGJ2DxxxxxxSC, 19.5x9.8x12.5mm, 5.2kVDC Isolated, 2W, SIP package style, https://power.murata.com/data/power/ncl/kdc_mej1.pdf Abracon Miniature Ceramic Smd Crystal ABM3B http://www.abracon.com/Resonators/abm3b.pdf, 5.0x3.2mm^2 package Miniature Crystal Clock Oscillator IQXO-70, http://www.iqdfrequencyproducts.com/products/details/iqxo-70-11-30.pdf, 7.5x5.0mm^2 package IQD Crystal Clock Oscillator TXCO Fordahl DFA S11-OV/UOV, http://www.iqdfrequencyproducts.com/products/details/iqxo-70-11-30.pdf, 7.0x5.0mm^2 package SMD Crystal Seiko Epson MC-156 https://support.epson.biz/td/api/doc_check.php?dl=brief_MC-156_en.pdf, hand-soldering, 6.7x1.5mm^2 package SMD Crystal ABS25 https://abracon.com/Resonators/abs25.pdf, 8.0x3.8mm^2 package SMD Crystal EuroQuartz MJ series http://cdn-reichelt.de/documents/datenblatt/B400/MJ.pdf, 5.0x3.2mm^2 package SMD Crystal Oscillator Seiko Epson SG-3030CM package SMD Crystal Oscillator Seiko Epson MC-505 http://media.digikey.com/pdf/Data%20Sheets/Epson%20PDFs/MA-505,506.pdf, 12.7x5.1mm^2 package SMD Crystal SERIES SMD0603/4 http://www.petermann-technik.de/fileadmin/petermann/pdf/SMD0603-4.pdf, 6.0x3.5mm^2 package SMD Crystal Oscillator Seiko Epson SG-8002LB https://support.epson.biz/td/api/doc_check.php?mode=dl&lang=en&Parts=SG-8002DC, 5.0x3.2mm^2 package 3.2x2.5mm, 1-220MHz High Performance Differential Oscillator SiTime SiT9121 https://www.sitime.com/datasheet/SiT9121 Silicon_Labs LGA, 6 Pin (https://www.ti.com/lit/ds/symlink/sn74auc1g04.pdf#page=24), Solder Mask Defined VSON, 8 Pin (http://www.ti.com/lit/ds/symlink/iso1050.pdf), generated with kicad-footprint-generator ipc_gullwing_generator.py NF-Transformer, ETAL, P2781, SMD, NF-Transformer ETAL P3188 SMD NF-Transformer, ETAL, P2781, SMD, NF-Transformer ETAL P3188 SMD.

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