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Motion sensors; keepout area marked (Package see: https://store.invensense.com/datasheets/invensense/MPU9250REV1.0.pdf; See also https://www.invensense.com/wp-content/uploads/2015/02/InvenSense-MEMS-Handling.pdf 24-Lead Plastic QFN (4mm x 4mm) (see Linear Technology DFN_8_05-08-1698.pdf DFN, 8 Pin (https://pdfserv.maximintegrated.com/package_dwgs/21-0168.PDF), generated with StandardBox.py) (https://www.bourns.com/docs/Product-Datasheets/SRF1260.pdf Bourns SRP1245A SMD inductor http://www.bourns.com/docs/Product-Datasheets/SRP1245A.pdf Bourns SRP1245A SMD inductor https://www.bourns.com/docs/Product-Datasheets/SRR1210A.pdf Bourns SRR1210A SMD inductor http://www.bourns.com/docs/Product-Datasheets/SRR1260.pdf SMD Inductor Bourns SRR1260 series SMD inductor, https://www.bourns.com/docs/Product-Datasheets/SRU1028.pdf Bourns SRU1028 series SMD SMT SPST EVQP2 Light Touch Switch, https://industrial.panasonic.com/cdbs/www-data/pdf/ATK0000/ATK0000CE28.pdf Light Touch Switch 0 4 2 Button_Switch_SMD SW_SPST_EVQQ2 Light Touch Switch, https://industrial.panasonic.com/cdbs/www-data/pdf/ATK0000/ATK0000CE28.pdf Light Touch Switch, https://industrial.panasonic.com/cdbs/www-data/pdf/ATK0000/ATK0000CE28.pdf 0 4 2 Button_Switch_SMD SW_SPST_EVQQ2 Light Touch Switch,https://industrial.panasonic.com/cdbs/www-data/pdf/ATK0000/ATK0000CE20.pdf 0 Light Touch Switch 0 4 2 Button_Switch_SMD SW_SPST_EVQP7C Light Touch Switch, http://industrial.panasonic.com/cdbs/www-data/pdf/ATK0000/ATK0000CE3.pdf SMD SMT ceramic resonator filter SMD Resomator/Filter 7.2x3.0mm, Murata CSTCC8M00G53-R0; 8MHz resonator, SMD, Farnell (Element 14) #1170435, http://www.farnell.com/datasheets/19296.pdf?_ga=1.247244932.122297557.1475167906, hand-soldering, 7.2x3.0mm^2 package SMD Crystal Seiko Epson MC-156 https://support.epson.biz/td/api/doc_check.php?dl=brief_MC-156_en.pdf, hand-soldering, 6.7x1.5mm^2 package SMD Crystal MicroCrystal CC8V-T1A/CM8V-T1A series https://www.microcrystal.com/fileadmin/Media/Products/32kHz/Datasheet/CC8V-T1A.pdf.