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Version 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 ** https://www.instructables.com/Another-MIDI-to-CV-Box-/ yet another fairly simple one, using Arduino (nano or uno) + MCP4725 (DAC). ** https://hkadesign.org.uk/monotronkb.html for yet another version 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 arduino nano clone (atmega 328p), 12-bit dac (mcp4726) and small amounts of supporting hardware Microcontroller and smoothed PWM https://kassu2000.blogspot.com/2019/10/quantizer.html using a gate. Main synth_tools/Schematics/SynthMages.pretty/6.3mm_NPTH_MAXJLCPCB.kicad_mod 24 lines Binary files /dev/null and b/Hardware/Panel/precadsr_panel.png differ Cell (black box KASSU / AO Grid is metric (mm), left edge centeris at (50,150). Notey increases upward here but downward in KiCad.Grid is metric (mm), left edge centeris at (50,150). Notey increases upward here but downward in KiCad. Pot (9 / 16 mm vertical board mount OR: | | | C7, C11 | 2 Hardware/lib/Kosmo_panel | 2 pin Molex connector 2.54 mm spacing DEF 2_pin_Molex_connector J 0 40 Y N 1 F N DEF SW_DIP_x03 SW 0 40 N N 1 F N DEF SW_Rotary12 SW 0 0 Y N 1 F N DEF SW_DP3T SW 0 0 Y N 2 F N ALIAS SW_E3_SA3624 SW_E3_SA6432 SW_MMI_Q5-100 DEF SW_MEC_5E SW 0 40 N N 1 F N DEF SW_SPST_Temperature SW 0 40 Y N 1 F N DEF Vactrol U 0 40 Y N 1 F N DEF Kosmo_panel_Led_Hole H 0 40 0.0 0 LTYPE 5 15 330 5 100 AcDbSymbolTableRecord 100 AcDbLinetypeTableRecord 2 BYLAYER 70 0 3 vertex -6.36396 6.36396 3 facet normal 4.928173e-001 8.630859e-001 1.105163e-001 vertex -1.581871e+000 -4.915369e+000 2.470218e+001 facet normal 7.859011e-01 2.680818e-03 6.183464e-01 facet normal 0.098397 -0.0148716 0.995036 vertex 4.28949 -6.75916 19.9463 vertex 5.86835 7.35868 20.0916 facet normal -0.5 -0.866026 -1.49618e-05 facet normal 0.472777 -0.88054 0.0336276 facet normal 0.84429 -0.451284 0.288993 facet normal -0.392071 0.262789 0.881602 vertex -6.79329 -0.261859 7.03804 facet normal 0.188007 -0.291191 0.938009 facet normal -1.192332e-14 -1.000000e+00 -7.097263e-15 facet normal 4.747859e-001 -8.131037e-001 3.368097e-001 facet normal -0.84015.

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