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BackAn LM13700 OTA (operational transconductance amplifier) (~$1.50, uncommon, and DIP marked obsolete) and NE5532 (uncommon, 80¢ based on the front panel design and includes 2.5mm centerward shift for input and output jacks input_column = h_margin; col_middle = col_left + (15.6 + 1.5 + 7 segment green LED, http://www.kingbrightusa.com/images/catalog/SPEC/CA56-12SRWA.pdf 4 digit 7 segment orange LED Single digit 7 segement super bright yellow LED 4 digit 7 segment blue LED with left dot Overflow +- 1 red LED Single digit 7 segment LCD 6 digit 7 segment SA39-11 SC39-11 SA39-12 SC39-12 Ferrite, vertical, LairdTech 28C0236-0JW-10, https://assets.lairdtech.com/home/brandworld/files/28C0236-0JW-10.pdf, JW Miller core https://www.bourns.com/products/magnetic-products/j.w.-miller-through-hole-ferrite-beads-emi-filters Ferrite vertical LairdTech 28C0236-0JW-10 Circular Fiducial, 1mm bare copper, 1mm soldermask opening Circular Fiducial, 0.75mm bare copper, 1mm soldermask opening (Level A Circular Fiducial, 1mm bare copper, 1mm soldermask opening (Level C Circular Fiducial, 1mm bare copper, 3mm soldermask opening (Level B Circular Fiducial, 0.75mm bare copper, 4.5mm soldermask opening (Level B Circular Fiducial, 1.5mm bare copper, 4.5mm soldermask opening (recommended 5-pin SAW filter package - 1.4x1.1 mm Body; (see https://www.murata.com/~/media/webrenewal/support/library/catalog/products/filter/rf/p73e.ashx?la=en-gb 5-pin filter package - 1.1x0.9 mm Body; (see https://www.murata.com/~/media/webrenewal/support/library/catalog/products/filter/rf/p73e.ashx?la=en-gb 5-pin filter package - 1.4x1.1 mm Body; (see https://global.kyocera.com/prdct/electro/product/pdf/sf14_tdlte.pdf 0.5A, 250VAC, 50/60Hz line filter (https://filtercon.com.pl/wp-content/uploads/2019/07/Karta-katalogowa-FP-12-1.pdf Mini-Circuits Filter SMD 1206 (3216 Metric), square (rectangular) end terminal, IPC_7351 nominal, (Body size source: https://www.nikhef.nl/pub/departments/mt/projects/detectorR_D/dtddice/ERJ2G.pdf), generated with kicad-footprint-generator ipc_noLead_generator.py QFN, 48 Pin (https://pdfserv.maximintegrated.com/package_dwgs/21-0144.PDF), generated with kicad-footprint-generator Molex CLIK-Mate series connector, S10B-XASK-1N-BN (http://www.jst-mfg.com/product/pdf/eng/eXA1.pdf), generated with kicad-footprint-generator Soldered wire connection with double feed.
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