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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 the CLOCK op-amp from 1 to something more decisive, like 3x. Then a signal as low as 2v could works as an external clock. One idea: add a voltage to trigger a second sequencer's run, which then re-triggers the first. CV in that pauses the clock Add CV (and knob) controlled glide to schematic Add pulldown resistors for reset debounce cap; formatting checkpoint before trying to implement chaining Checkpoint before trying to add picture 9f9f6acf76 Add notes about UX component wiring 9f9f6acf76f746b4755da71c07bb656091774052 SMT updates 0d3d72c49e606725216a5a9a4217e6c039d5a574 2bd01a1ff2d30ca3cff647bbf3b80645437cc07c Add schematic, start on PCB sandwich, making some final-ish decisions about connecting to front panel than usual. If you don't want the hole to go all the way through then set this to a dual or tripple output DCDC-Converter, CINCON, EC6Cxx, single output, http://www.cincon.com/upload/media/data%20sheets/Data%20Sheet%20(DC)/C%20CASE/SPEC-EC6C-V12.pdf DCDC-Converter CINCON EC6Cxx dual or quad would add very little cost even without 1v/oct, could be done with a diameter between 16-19 mm: https://www.keyelco.com/product.cfm/product_id/826 Keystone #500, CR1220 battery holder, http://www.keyelco.com/product-pdf.cfm?p=710 AA CR2 A battery holder for 18650 cylindrical cells http://www.keyelco.com/product.cfm/product_id/918 Keystone type 3001 coin cell retainer Keystone type 104 battery holder with leaf spring, Keystone, https://ken.keyeuro.eu/cat/590.pdf AA battery cell holder 2xAA cell battery holder, Memory Protection Devices P/N BC2AAPC, http://www.memoryprotectiondevices.com/datasheets/BC2AAPC-datasheet.pdf 2xAA cell battery holder, Keystone P/N 2468, http://www.keyelco.com/product-pdf.cfm?p=1033 AAA battery holder Keystone type 107 battery holder with leaf spring, Keystone, https://ken.keyeuro.eu/cat/590.pdf AA battery cell holder CR2032 retainer clip, SMT ( http://www.farnell.com/datasheets/1505853.pdf BC-2001 CR2032 2032 Battery Holder BH-331P Battery Type 3xAAA Keystone Battery Holder SMD Tactile Switch, B3SL Middle Stroke Tactile Switch with High Contact Reliability, Side-actuated Model, without Ground Terminal, without Boss Ultra-small-sized Tactile Switch with High Contact Reliability, Side-actuated Model, without Ground Terminal, without Boss Ultra-small-sized Tactile Switch for High-Density Packaging with Ground Terminal, without Boss Ultra-small-sized Tactile Switch for High-Density Mounting, 7.3mm height, https://omronfs.omron.com/en_US/ecb/products/pdf/en-b3fs.pdf C&K Components SPST SMD PTS645 Series 6mm Tact Switch Low-profile SMD Tactile Switch, http://www.helloxkb.com/public/images/pdf/TS-1187A-X-X-X.pdf Ultraminiature Surface Mount Tactile Switch with High Contact Reliability, Side-actuated Model, without Ground Terminal, with Boss Ultra-small-sized.

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