Hand-soldering, 10.5x5.0mm^2 package SMD Crystal Seiko Epson MC-405. SMD PTS125 Series 12mm Tact Switch. Https://www.yuden.co.jp/wireless_module/document/datareport2/en/TY_BLE_EYSGJNZ_DataReport_V1_9_20180530E.pdf Taiyo Yuden BK Series (see https://www.yuden.co.jp/productdata/catalog/mlci09_e.pdf Inductor. New Pull Request
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