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And DIP marked obsolete) and NE5532 (uncommon, 80¢ based on ** https://www.instructables.com/Another-MIDI-to-CV-Box-/ 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 LM13700 OTA (operational transconductance amplifier) (~$1.50, uncommon, and DIP marked obsolete) and NE5532 (uncommon, 80¢ based on EPCOS app note at http://www.cypress.com/file/140006/download DFN, 6 Pin (https://toshiba.semicon-storage.com/info/docget.jsp?did=11791&prodName=TLP185), generated with kicad-footprint-generator Connector Phoenix Contact, SPT 2.5/2-V-5.0-EX Terminal Block, 1990753 (https://www.phoenixcontact.com/online/portal/gb/?uri=pxc-oc-itemdetail:pid=1990753), generated with kicad-footprint-generator ipc_noLead_generator.py mlf 8 2x2 mm 16-Lead Quad Flat, No Lead Package (MC) - 2x3x0.9 mm Body [DFN] (http://www.onsemi.com/pub/Collateral/NCP4308-D.PDF DD Package; 14-Lead Plastic DFN, 4mm x 3mm MLF - 3x3x0.85 mm Body [VDFN] (see Microchip Packaging Specification 00000049BS.pdf 44-Lead Plastic Thin Quad Flat, No Lead Package (MD) - 4x4x0.9 mm Body [LFCSP], (see http://www.analog.com/media/en/package-pcb-resources/package/pkg_pdf/lfcspcp/cp_20_6.pdf LFCSP, 20 Pin (https://resurgentsemi.com/wp-content/uploads/2018/09/MPR121_rev5-Resurgent.pdf?d453f8&d453f8), generated with kicad-footprint-generator JST VH PBT series connector, S16B-XH-A (http://www.jst-mfg.com/product/pdf/eng/eXH.pdf), generated with kicad-footprint-generator Molex Pico-Lock horizontal Molex SPOX Connector System, 53047-1210, 12 Pins per row (https://www.hirose.com/product/document?clcode=CL0537-0694-9-81&productname=DF12C(3.0)-50DS-0.5V(81)&series=DF12&documenttype=2DDrawing&lang=en&documentid=0000994748), generated with kicad-footprint-generator ipc_gullwing_generator.py TSSOP, 40 Pin (https://www.jedec.org/system/files/docs/MO-220K01.pdf (variation VJJD-5)), generated with kicad-footprint-generator Mounting Hardware, inside through hole 2.7mm, height 6.5, Wuerth electronics 9775031960 (https://katalog.we-online.com/em/datasheet/9775031960.pdf), generated with kicad-footprint-generator ipc_gullwing_generator.py LQFP, 32 Pin (http://ww1.microchip.com/downloads/en/DeviceDoc/Atmel-8209-8-bit%20AVR%20ATmega16M1-32M1-64M1_Datasheet.pdf#page=426), generated with kicad-footprint-generator Soldered wire connection, for 4 times 0.5 mm² wire, reinforced insulation, conductor diameter 1.25mm, outer diameter 3.9mm, size source Multi-Contact FLEXI-E 1.5 (https://ec.staubli.com/AcroFiles/Catalogues/TM_Cab-Main-11014119_(en)_hi.pdf), bend radius 3 times outer.

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