synth_tools

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Normal 2.806319e-02 -9.996062e-01 0.000000e+00 vertex -1.032503e+02 9.473903e+01 1.855000e+01 vertex -9.898495e+01 1.059137e+02 1.855000e+01 vertex -1.015466e+02 1.047674e+02 2.655000e+01 facet normal 0.464682 -0.695443 -0.548115 facet normal -0.0980055 -0.0096532 0.995139 vertex -6.2529 -4.17805 6.0001 facet normal -4.926591e-001 8.446028e-001 2.096026e-001 facet normal 0.758952 0.0816197 0.646011 facet normal -3.799200e-01 -9.250193e-01 -3.443423e-04 vertex -9.483789e+01 1.056282e+02 2.550000e+00 facet normal -0.485049 0.124364 0.865599 vertex -5.2499 4.56563 7.05523 facet normal -0.622326 -0.758285 0.194199 vertex -7.20568 -7.20568 2.19603 facet normal -0.0727789 0.0673895 -0.995069 vertex -8.0879 -5.8736 0.0420134 vertex -8.15582 -5.767 0.0397416 facet normal 0.769325 -0.631363 0.0975683 facet normal 0.816068 0.545294 -0.191538 facet normal -0.865129 0.462433 0.194183 facet normal -0.747983 -0.192821 0.635092 facet normal -0.0822608 -0.0821747 0.993217 vertex 5.29418 5.16563 6.86711 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 811ef45c764021f623b8bb59234df1314fce4e91 12V, -12V and ground needed, probably up to 1amp https://www.youtube.com/watch?v=pQKN30Mzi2g - maybe not as efficient as a full threaded nose and offset PCB pins, https://www.neutrik.com/en/product/nmj4hcd2 M Series, 6.35mm (1/4in) jack receptacle, vertical pcb mount, https://www.neutrik.com/en/product/nlj2md-h speakON Combo, 2 pole chassis connector, grey D-size flange, mirrored self tapping screw holes (A-screw), vertical PCB mount, http://cherryamericas.com/wp-content/uploads/2014/12/mx_cat.pdf Cherry MX keyswitch, 6.25u, http://matias.ca/switches/ Matias ALPS keyswitch 1.50u plate Cherry MX keyswitch 2.00u Matias/ALPS keyswitch, 2.75u, PCB mount, https://www.neutrik.com/en/product/nc3faah2 AA Series, 3 pole male XLR receptacle, grounding: separate ground contact to mating connector shell to pin1 and front panel, vertical PCB mount, retention spring instead of latch, https://www.neutrik.com/en/product/nc4fav-0 A Series, 3 pole female XLR receptacle, grounding: separate ground contact to mating connector shell to pin1 and front panel, vertical PCB mount, retention spring, https://www.neutrik.com/en/product/ncj9fi-v Combo I series, 3 pole XLR female receptacle with 6.35mm (1/4in) mono jack, switched, half threaded nose, https://www.neutrik.com/en/product/nrj6hf-au Slim Jacks, 6.35mm (1/4in) stereo jack (T/TN/R/RN/S), https://www.neutrik.com/en/product/nj5fd-v 6.35mm (1/4 in) Vertical Jack, 2 x 6mm drills Triple banana socket, footprint - 3 5mm LEDs -Consider: 1 simple on/off switch/button/knob/etc. Binary.

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