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R23, R24 R3, R21, R27, R28 | 3 | 4.7k | Resistor | | L1 | 1 | 2_pin_Molex_connector | 2 | 10k | Resistor | | | | R21, R22, R23 | 3 | 2N3904 | 0.2A Ic, 40V Vce, Small Signal NPN Transistor, TO-92 KK254 Molex header 2.54 mm spacing KK254 Molex header Switch, triple pole double throw D Switch, three position, dual pole double throw, right angle, PTS645VL83-2 LFS tactile switch Light Touch Switch, http://industrial.panasonic.com/cdbs/www-data/pdf/ATK0000/ATK0000CE3.pdf SMD SMT 3.2x2.5mm, 6-pin QFN (https://www.sitime.com/datasheet/SiT9365 page 13 SMD SMT ceramic resonator filter filter hand-soldering SMD Crystal MicroCrystal CC1V-T1A series https://www.microcrystal.com/fileadmin/Media/Products/32kHz/Datasheet/CC1V-T1A.pdf, 8.0x3.7mm^2 package SMD Crystal EuroQuartz X22 series http://cdn-reichelt.de/documents/datenblatt/B400/DS_X22.pdf, hand-soldering, 2.5x2.0mm^2 package SMD Crystal Qantek QC5CB, https://www.qantek.com/tl_files/products/crystals/QC5CB.pdf crystal Epson Toyocom FA-128 (https://support.epson.biz/td/api/doc_check.php?dl=brief_FA-128⟨=en), 2x1.6mm^2 package SMD Crystal EuroQuartz MJ series http://cdn-reichelt.de/documents/datenblatt/B400/MJ.pdf, 5.0x3.2mm^2 package Ultraminiature Crystal Clock Oscillator (XO) (https://www.diodes.com/assets/Datasheets/FN_3-3V.pdf Oscillator Crystal SMD SMT SPST EVQPUJ EVQPUA SMD SMT crystal oscillator hand-soldering Miniature Crystal Clock Oscillator TXCO Fordahl DFA S2-KS/LS/US, http://www.iqdfrequencyproducts.com/products/details/iqxo-70-11-30.pdf, hand-soldering.

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