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Ovals - 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 supporting components. ~$6 in parts, two tl074 op amps and otherwise a bunch of wires backwards Fix getting a bunch of diodes and support 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 the footprint. Some options: Bourns PTL series, such as: ** https://www.mouser.com/ProductDetail/Bourns/PTL30-15O0-105A2?qs=fV9UsjselOEqdQiKFAm%2Fog%3D%3D (A1M, orange LED, 30mm travel, 15mm shaft) * https://www.mouser.com/ProductDetail/Bourns/PTL30-15R0-103B1?qs=X8nz4ozed5glbMOCRmYKzw%3D%3D (B10K, red LED, 30mm travel, 15mm shaft # Original README: Kassutronics Precision ADSR with retriggering and looping modifications title("FIREBALL", size=12, font=font_for_title); title("VCO", size=12, font=font_for_title); title("VCO", size=12, font=font_for_title); title("VCO", size=12, font=font_for_title); title("VCO", size=12, font=font_for_title); title("VCO", size=12, font=font_for_title); title("VCO", size=12, font=font_for_title); 2c2abd8837 checkpoint before getting really weird with WireIt dd8c61c34f A couple more minor clearance tweaks Add ground fills, fix some clearance issues, add PCB slot, more options for potentiometer spoke placement' (#1) from bugfix/10hp into main Reviewed-on: https://gitea.circuitlocution.com/synth_mages/MK_VCO/pulls/2 Merge pull request synth_mages/MK_VCO#1 cfb5bfb128 Finish schematic, add PDF Finish schematic, add PDF Finish schematic, add PDF' (#2) from schematic into main afea9d5a2cf23e2a33a2927086270d4d602f5a2b 46614f2341 Go to file From 33729ec97f6dd2ed68c4ca06088ce0b21651948d Mon Sep 17 00:00:00 2001 Subject: [PATCH] github url .../PCB/precadsr_Gerbers/precadsr-B_Cu.gbr | 4 .../PCB/precadsr_Gerbers/precadsr-PTH.drl | 207 .../PCB/precadsr_Gerbers/precadsr-job.gbrjob | 128 .../precadsr_aux_Gerbers/precadsr-B_Mask.gbr | 185 .../precadsr_aux_Gerbers/precadsr-B_Paste.gbr | 15 .../precadsr_aux_Gerbers/precadsr-F_SilkS.gbr | 2066 .../precadsr_aux_Gerbers/precadsr-NPTH.drl | 4 | 100k | Resistor | | ----- | --- | ---- | ----------- | ---- | ---- | ---- | | | | R114 | 1 | SW_SPDT | Switch, triple pole double throw, illuminated paddle, red and green LEDs K switch triple-pole double-throw DPDT spdt ON-ON K reed magnetic switch D Single Pole Single Throw (SPST) switch, small symbol D 11x DIP Switch, Single Pole Single Throw (SPST) switch, small symbol D 6x DIP Switch, Single Pole Single Throw (SPST) switch, small symbol D 7x DIP Switch, Single Pole Single Throw (SPST) switch, small symbol D 3x DIP Switch.

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