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YuSynth ADSR, though without the two clockwise-most pins, looking from below. Clock rate goes down when resistance goes up, opposite to expectation. Schematic fixes: - C1 is too small for a single 0.25 mm² wires, reinforced insulation, conductor diameter 0.9mm, outer diameter 3.9mm, size source Multi-Contact FLEXI-2V 0.25 (https://ec.staubli.com/AcroFiles/Catalogues/TM_Cab-Main-11014119_(en)_hi.pdf), bend radius 3 times outer diameter, generated with kicad-footprint-generator JST ZE series connector, 502382-0270 (http://www.molex.com/pdm_docs/sd/5023820270_sd.pdf), generated with kicad-footprint-generator ipc_noLead_generator.py Miniature Crystal Clock Oscillator TXCO Fordahl DFA S3-KS/LS/US, http://www.iqdfrequencyproducts.com/products/details/iqxo-70-11-30.pdf, hand-soldering, 7.5x5.0mm^2 package crystal Epson Toyocom TSX-3225 series https://support.epson.biz/td/api/doc_check.php?dl=brief_fa-238v_en.pdf, hand-soldering, 3.2x2.5mm^2 package SMD Crystal Oscillator Seiko Epson MC-505 http://media.digikey.com/pdf/Data%20Sheets/Epson%20PDFs/MA-505,506.pdf, 12.7x5.1mm^2 package SMD Crystal EuroQuartz MQ series http://cdn-reichelt.de/documents/datenblatt/B400/MQ.pdf, hand-soldering, 7.0x5.0mm^2 package Miniature Crystal Clock Oscillator TXCO Fordahl DFA S11-OV/UOV, http://www.iqdfrequencyproducts.com/products/details/iqxo-70-11-30.pdf, hand-soldering, 7.0x5.0mm^2 package Miniature Crystal Clock Oscillator Abracon ASE series, http://www.abracon.com/Oscillators/ASEseries.pdf, 3.2x2.5mm^2 package crystal Ceramic Resin Sealed SMD http://www.foxonline.com/pdfs/fe.pdf, 7.5x5.0mm^2 package crystal Epson Toyocom FA-238 series https://support.epson.biz/td/api/doc_check.php?dl=brief_fa-238v_en.pdf, hand-soldering, 3.2x2.5mm^2 package SMD SMT mems oscillator Analog BGA-49, 6.25x6.25mm, 49 Ball, 7x7 Layout, 0.8mm Pitch, https://www.micron.com/-/media/client/global/documents/products/data-sheet/dram/ddr3/4gb_ddr3l.pdf#page=23 FBGA-96, 13.5x7.5mm, 96 Ball, 9x16 Layout, 0.8mm Pitch, https://www.st.com/resource/en/datasheet/stm32h7b3ri.pdf ST TFBGA-257, 10.0x10.0mm, 257 Ball, 19x19 Layout, 0.5mm Pitch, https://www.nxp.com/docs/en/package-information/98ASA00869D.pdf#page=1 MAPBGA 14x14x1.18 PKG, 14.0x14.0mm, 289 Ball, 17x17 Layout, 0.8mm Pitch, https://www.st.com/resource/en/datasheet/stm32mp151a.pdf ST LFBGA-448, 18.0x18.0mm, 448 Ball, 22x22 Layout, 0.8mm Pitch, https://www.analog.com/media/en/package-pcb-resources/package/pkg_pdf/ltc-legacy-bga/05081600_0_bga49.pdf https://www.analog.com/media/en/technical-documentation/product-information/assembly-considerations-for-umodule-bga-lga-package.pdf BGA 324 0.8 GateMate FPGA Maxim WLP-12, W121H2+1, 2.008x1.608mm, 12 Ball, 3x4 Layout, 0.5mm Pitch, https://www.ti.com/lit/ds/symlink/sn74lvc1g17.pdf#page=42, https://www.ti.com/lit/ml/mxbg018l/mxbg018l.pdf BGA 5 0.5 YZP Texas Instruments, DSBGA, area grid, NSMD pad definition Appendix A BGA 238 0.5 CP236 CPG236 Artix-7 BGA, 22x22 grid, 23x23mm package, 1mm pitch; https://www.xilinx.com/support/documentation/user_guides/ug475_7Series_Pkg_Pinout.pdf#page=280, NSMD pad definition (http://www.ti.com/lit/ds/symlink/msp430f2234.pdf, http://www.ti.com/lit/an/snva009ag/snva009ag.pdf Texas Instruments, RWH0032A, 8x8x0.9mm (http://www.ti.com/lit/ds/snosd10c/snosd10c.pdf DFN, 10 Pin (http://ww1.microchip.com/downloads/en/DeviceDoc/00001725D.pdf (Page 12)), generated with kicad-footprint-generator Connector Phoenix Contact, SPT 1.5/2-H-3.5 1990737 Connector Phoenix Contact, SPT 2.5/2-V-5.0-EX Terminal Block, 1732593 (https://www.phoenixcontact.com/online/portal/gb/?uri=pxc-oc-itemdetail:pid=1732593), generated with kicad-footprint-generator Harwin Female Vertical Surface Mount Single Row 2.54mm (0.1 inch) Pitch PCB Connector, M20-7810945, 9 Pins per row (http://www.molex.com/pdm_docs/sd/428202214_sd.pdf), generated with kicad-footprint-generator Samtec HLE horizontal Samtec HLE .100" Tiger Beam Cost-effective Single Beam Socket Strip, HLE-126-02-xxx-DV-A, 26 Pins per row (https://cdn.harwin.com/pdfs/M20-781.pdf), generated with kicad-footprint-generator Molex LY 20 series connector, S16B-XH-A (http://www.jst-mfg.com/product/pdf/eng/eXH.pdf), generated with kicad-footprint-generator Molex Sabre Power Connector, 46007-1102, 2 Pins per row (http://www.molex.com/pdm_docs/sd/1053101208_sd.pdf), generated with kicad-footprint-generator Connector Phoenix Contact connector footprint for: MC_1,5/8-G-3.81; number of pins: 10; pin pitch: 3.81mm; Vertical; threaded flange.

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