synth_tools

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1.881520e-15 -5.428596e-15 1.000000e+00 facet normal 0.993102 0.0624781 0.0992224 vertex 7.93692 1.00267 20 facet normal 3.472661e-15 -2.508225e-15 1.000000e+00 facet normal 1.219172e-14 -1.000000e+00 -7.933715e-15 facet normal 0.0980171 -0.995185 1.13576e-06 facet normal 0.769304 -0.631387 0.0975749 vertex -5.00013 -7.48323 4.51216 facet normal 0.453753 -0.0357191 0.890411 facet normal 9.682993e-01 2.497929e-01 -0.000000e+00 facet normal 2.497601e-01 9.683078e-01 -0.000000e+00 facet normal 0.0285785 -0.29018 0.956545 vertex 8.07502 0 5.88782 vertex 7.91987 -1.57536 5.88782 facet normal 0.195093 -0.980785 -1.68839e-05 facet normal 0.499906 -0.86608 0.000116599 facet normal -0.288584 0.95132 0.108209 facet normal 0.88194 0.471362 3.9939e-07 facet normal -2.801356e-02 9.996075e-01 -2.494886e-06 facet normal 0.768445 0.630708 0.108161 facet normal 0.828702 -0.0816302 0.553705 facet normal 8.099862e-001 5.864490e-001 0.000000e+000 facet normal -0.0729619 0.338843 0.938009 facet normal -4.942513e-001 -8.649397e-001 8.714973e-002 facet normal -0.938714 0.260376 0.225876 facet normal 0.768246 -0.629688 0.115285 facet normal -7.425920e-001 6.697441e-001 0.000000e+000 vertex -4.567763e+000 -3.354764e+000 9.983999e+000 vertex 7.068955e+000 -6.845815e-001 1.747200e+001 facet normal -0.262695 -0.257305 0.929939 vertex 5.50428 -4.89431 6.95641 facet normal 0.000129735 -0.113445 0.993544 facet normal 9.609584e-001 2.766931e-001 -0.000000e+000 vertex 6.948225e+000 1.404741e+000 9.983999e+000 vertex -6.313201e+000 3.108942e+000 2.496000e+001 vertex 7.086258e+000 3.645680e-001 9.983999e+000 vertex 1.612724e+000 6.851379e+000 1.747200e+001 facet normal 7.143574e-001 6.997811e-001 0.000000e+000 facet normal -2.880153e-004 -5.040268e-004 -9.999998e-001 ## Documentation: * [Schematic](Docs/precadsr.pdf) * PCB layout: make power connection traces larger; MK uses a CA3080 OTA, an expensive and rare chip these days ($3/ea on amazon, maybe fakes) VCA MK's VCA Probably a straightforward build: one op-amp, four transistors and some example modules Envelope/Envelope.kicad_pcb | 2 | 10R | Resistor | | R4, R12, R13 | 3 | 10k | Resistor | | | | | Tayda | A-159 | | | S1 | 1 | SW_3PDT_x3 | 3PDT miniature toggle switch ON-ON Push button switch, generic, two pins | Dailywell | PAS7B3M1CESA6-5 | Tayda | A-553 | | | | | | | R14 | 1 | B20k | Potentiometer | | | | | | | | | Tayda | A-4349 | | U2 | 1 nF | Unpolarized capacitor | | | | | S3 | 1 Hardware/Panel/precadsr-panel/fp-lib-table | 2 pin Molex header 2.54 mm spacing D Switch, triple pole double throw, separate symbols K switch dp3t ON-ON-ON D Switch, single pole normally-open tactile switch SPST angled PTS645VL31-2 LFS C&K Button tactile switch SPST angled PTS645VL31-2 LFS C&K Button tactile switch SPST angled PTS645VL58-2 LFS tactile switch SPST right angle, http://spec_sheets.e-switch.com/specs/P040170.pdf Switch, single pole double throw, right angle, stacked (https://www.molex.com/content/dam/molex/molex-dot-com/products/automated/en-us/salesdrawingpdf/484/48406/484060001_sd.pdf USB 3.0 3.1 3.2.

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