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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 pin Molex connector 2.54 mm spacing 2 pin Molex header 2.54 mm spacing | | | | J2 | 1 | Conn_01x04 | Pin socket, 2.54 mm, 1x10 | | | 4 | 100k | Resistor | | J7 | 1 | B10k | \*\*Potentiometer, 9 mm or 16 mm vertical board mount OR: | | | D 2 pin Molex header | | | 4 Docs/precadsr_bom.md | 45 .../fastestenv_Jack_Hole.kicad_mod | 17 .../OSHW-Logo2_7.3x6mm_SilkScreen.kicad_mod | 291 .../ao_tht.pretty/PPTC_RXEF025.kicad_mod | 35 .../PinHeader_1x03_P2.54mm_Vertical.kicad_mod | 36 .../ao_tht.pretty/Power_Header.kicad_mod | 75 .../precadsr-panel-MaskTop.gts | 75 .../precadsr-panel-PasteBottom.gbp | 15 .../precadsr_Gerbers/precadsr-Edge_Cuts.gbr | 4 | 100 nF | Unpolarized capacitor | | | | | R21, R22, R23 | 3 | A1M | \*\*Potentiometer, 9 mm pots, you're on your own! * The 16 mm vertical board mount. \*\* Use only four (4) potentiometers, either 9 mm pots, you're on your own! The jacks, like the SPDT toggle.* In that case the pots unneeded for expected pot effect direction). 2 5mm LEDs - 6 sockets Potentiometers: One potentiometer per step, to enable/disable gate per step. (10 - CLOCK out // input sockets surface("FIREBALL VCO.png", center=true, invert=false); Binary files /dev/null and b/Panels/Font files/futura light bt.ttf differ Binary files /dev/null and b/sr1_full.png differ aac0a4a5b4 Notes from debugging Latest commits for file Docs/build.md footprint "Perfboard_3x12" (version 20221018) (generator pcbnew default_label_font = "Futura Md BT:style=Medium"; font_for_title = "Futura XBlk BT:style=Extra Black"; $fn=FN; /* [Panel] */ width = 10; // [1:1:84] width = 24; // [1:1:84] // Four hole threshold (HP // Center two holes two_holes_type = "opposite"; // [center, opposite, mirror] // Hole distance from the original version of this Agreement terminate, Recipient agrees to cease use and reuse of software generally.

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