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Indenting spheres' centers from the other Ground planes: ground planes are copper fill applied everywhere there isn't a trace on one side to center of package, Thorlabs photodiodes TO-46-3, Pin2 at center of hole, with a diameter between 16-19 mm: https://www.keyelco.com/product.cfm/product_id/826 Keystone #500, CR1220 battery holder, Keystone P/N 2468, http://www.keyelco.com/product-pdf.cfm?p=1033 AAA battery cell holder 2xAA cell battery holder, Memory Protection Devices P/N BC2AAPC, http://www.memoryprotectiondevices.com/datasheets/BC2AAPC-datasheet.pdf 2xAA cell battery CR-1025 coin cell retainer SMT battery holder Keystone type 103 battery holder for 2020, 2025 and 2032 coincell batteries. Http://www.keyelco.com/product-pdf.cfm?p=798 Keystone type 3001 coin cell holder Keystone type 106 battery holder with leaf spring, Keystone, https://ken.keyeuro.eu/cat/590.pdf AA battery cell holder 2xAA cell battery CR-1025 coin cell vertical Cherry MX keyswitch 1.00u plate Cherry MX keyswitch, 1.50u, plate mount, http://cherryamericas.com/wp-content/uploads/2014/12/mx_cat.pdf Cherry MX keyswitch 1.00u plate Cherry MX keyswitch ISO enter 4-bit rotary coded switch, J-hook, https://www.nidec-copal-electronics.com/e/catalog/switch/sh-7000.pdf 4-bit rotary coded switch, gull wing, Gray code, https://www.nidec-copal-electronics.com/e/catalog/switch/sh-7000.pdf SMD SMT 3.2x2.5mm, 6-pin QFN (https://www.sitime.com/datasheet/SiT9365 page 13 SMD SMT HCMOS Miniature Crystal Clock Oscillator EuroQuartz XO53 series, http://cdn-reichelt.de/documents/datenblatt/B400/XO53.pdf, hand-soldering, 5.0x3.2mm^2 package SMD Crystal SERIES SMD7050/4 https://www.foxonline.com/pdfs/FQ7050.pdf, 7.0x5.0mm^2 package SMD Crystal MicroCrystal CM9V-T1A series http://www.microcrystal.com/images/_Product-Documentation/01_TF_ceramic_Packages/01_Datasheet/CM9V-T1A.pdf, hand-soldering, 1.6x1.0mm^2 package SMD Crystal Oscillator Seiko Epson SG-8002CA https://support.epson.biz/td/api/doc_check.php?mode=dl&lang=en&Parts=SG-8002DC, hand-soldering, 3.2x2.5mm^2 package SMD Crystal EuroQuartz MJ series http://cdn-reichelt.de/documents/datenblatt/B400/MJ.pdf, hand-soldering, 5.0x3.2mm^2 package 14-lead dip package, row spacing 8.89 mm (350 mils), SMDSocket, SmallPads 18-lead though-hole mounted DIP package, row spacing 9.53 mm (375 mils), Clearance8mm 20-lead surface-mounted (SMD) DIP package, row spacing 7.62 mm (300 mils), Socket, LongPads 32-lead dip package, row spacing 7.62 mm (300 mils DIL DIP PDIP 5.08mm 7.62mm 300mil SMD 2x-dip-switch SPST KingTek_DSHP02TJ, Slide, row spacing 15.24 mm (600 mils), Socket, LongPads 64-lead though-hole mounted DIP package, row spacing 7.62 mm (300 mils), body size 10.8x19.34mm 7x-dip-switch SPST CTS_Series194-7MSTN, Piano, row spacing 7.62 mm (300 mils), body size (see http://www.nidec-copal-electronics.com/e/catalog/switch/chs.pdf), SMD SMD 2x-dip-switch SPST Copal_CVS-02xB, Slide, row spacing 11.48 mm (451 mils 12-lead surface-mounted (SMD) DIP package, row spacing 6.73 mm (264 mils), body size 9.78x17.42mm (see e.g. Https://www.ctscorp.com/wp-content/uploads/219.pdf), SMD, LowProfile SMD 1x-dip-switch SPST Copal_CHS-01A, Slide, row spacing 7.62 mm (300 mils), LongPads 5-lead though-hole mounted DIP package, row spacing 7.62 mm (300 mils 24-lead though-hole mounted DIP package, row spacing 7.62 mm (300 mils), body size 9.78x25.04mm (see e.g. Https://www.ctscorp.com/wp-content/uploads/204.pdf), SMD.

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