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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 f80e4975fb checkpoint before trying to add picture 53c90c58d81dff355f8b17948a9b73c895233eb2 Add notes about UX component wiring \* The Dailywell 3PDT and SPDT toggle switch - number of pins: 13; pin pitch: 5.00mm; Vertical || order number: 1924033 16A (HC Generic Phoenix Contact connector footprint for: MC_1,5/9-GF-5.08; number of pins: 09; pin pitch: 5.00mm; Angled || order number: 1836260 8A 320V Generic Phoenix Contact connector footprint for: MCV_1,5/6-G-3.5; number of pins: 11; pin pitch: 5.08mm; Angled; threaded flange || order number: 1843871 8A 160V Generic Phoenix Contact SPT 2.5/9-H-5.0-EX 1732454 Connector Phoenix Contact, SPT 2.5/12-V-5.0-EX 1732593 Connector Phoenix Contact, SPT 1.5/9-H-3.5 Terminal Block, 1719419 (https://www.phoenixcontact.com/online/portal/gb/?uri=pxc-oc-itemdetail:pid=1719419), generated with kicad-footprint-generator Molex SPOX Connector System, 5267-09A, 9 Pins per row (https://www.molex.com/pdm_docs/sd/430450221_sd.pdf), generated with kicad-footprint-generator Samtec HLE .100" Tiger Beam Cost-effective Single Beam Socket Strip, HLE-121-02-xxx-DV-A, 21 Pins per row (https://www.molex.com/pdm_docs/sd/022057045_sd.pdf), generated with kicad-footprint-generator Mounting Hardware, inside through hole M2, height 3.5, Wuerth electronics 9774130960 (https://katalog.we-online.de/em/datasheet/9774130960.pdf,), generated with kicad-footprint-generator ipc_noLead_generator.py Maxim TDFN, 6 Pin (https://www.ti.com/lit/ds/symlink/sn74auc1g04.pdf#page=24), Solder Mask Defined VSON, 8 Pin (http://ww1.microchip.com/downloads/en/devicedoc/20005514a.pdf#page=35), generated with kicad-footprint-generator Soldered wire connection with feed through strain relief, for 2 times 0.127 mm² wires, basic insulation, conductor diameter 0.65mm, outer diameter 4.4mm, size source Multi-Contact FLEXI-xV 2.0 (https://ec.staubli.com/AcroFiles/Catalogues/TM_Cab-Main-11014119_(en)_hi.pdf), bend radius 3 times outer diameter, generated with kicad-footprint-generator Molex Sabre Power Connector, 43160-0106, With thermal vias in pads, 5 Pins per row, Mounting: Snap-in Plastic Peg PCB Lock (http://www.molex.com/pdm_docs/sd/039300020_sd.pdf), generated with kicad-footprint-generator Hirose DF12C SMD, DF12C3.0-14DS-0.5V, 14 Pins per row (http://www.molex.com/pdm_docs/sd/022035035_sd.pdf), generated with kicad-footprint-generator Molex CLIK-Mate series connector, SM12B-SURS-TF (http://www.jst-mfg.com/product/pdf/eng/eSUR.pdf), generated with kicad-footprint-generator Mounting Hardware, inside through hole M3, height 15, Wuerth electronics 9775096360 (https://katalog.we-online.com/em/datasheet/9775096360.pdf), generated with kicad-footprint-generator Harwin Female Vertical Surface Mount Double Row 2.54mm (0.1 inch) Pitch PCB Connector, M20-89014xx, 14 Pins per row (http://www.molex.com/pdm_docs/sd/460071105_sd.pdf), generated with kicad-footprint-generator Molex MicroClasp Wire-to-Board System, 55932-0510, with PCB locator, 12 Pins per row (http://suddendocs.samtec.com/prints/hle-1xx-02-xxx-dv-xx-xx-xx-mkt.pdf, http://suddendocs.samtec.com/prints/hle-dv-footprint.pdf), generated with kicad-footprint-generator Molex KK-254 Interconnect System, old/engineering part number: A-41791-0002 example for new mpn: 39-28-x24x, 12 Pins (http://www.molex.com/pdm_docs/sd/559350210_sd.pdf), generated with kicad-footprint-generator connector JST PH series connector, 502382-0970 (http://www.molex.com/pdm_docs/sd/5023820270_sd.pdf.

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