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Bunch of wires backwards Fix floating pin for op amp 54f1a61ba5 gets jiggy with PCB cutout, light-direction upwards, see http://www.onsemi.com/pub/Collateral/QRE1113-D.PDF PhotoDiode, plastic SMD DIL, 4.5x4mm² PhotoDiode plastic DIL RM5.08 PhotoTransistor, sidelooker package, RM2.54 PhotoTransistor sidelooker package RM2.54 package for Vishay CNY70 refective photo coupler package for Everlight ITR1201SR10AR, light-direction upwards, see http://www.everlight.com/file/ProductFile/ITR8307.pdf refective opto couple photo coupler IR Receiver Vishay TSOP-xxxx MOLD Oscillator, DIP8, Large Pads, http://cdn-reichelt.de/documents/datenblatt/B400/OSZI.pdf Miniature Crystal Clock Oscillator TXCO Fordahl DFA S2-KS/LS/US, http://www.iqdfrequencyproducts.com/products/details/iqxo-70-11-30.pdf, hand-soldering, 7.0x5.0mm^2 package SMD Crystal SERIES SMD3225/4 http://www.txccrystal.com/images/pdf/7m-accuracy.pdf, hand-soldering, 3.2x2.5mm^2 package Miniature Crystal Clock Oscillator TXCO Fordahl DFA S2-KS/LS/US, http://www.iqdfrequencyproducts.com/products/details/iqxo-70-11-30.pdf, 7.3x5.1mm^2 package Miniature Crystal Clock Oscillator ECS 2520MV series, https://www.ecsxtal.com/store/pdf/ECS-2520MV.pdf Miniature Crystal Clock Oscillator EuroQuartz XO32 series, http://cdn-reichelt.de/documents/datenblatt/B400/XO32.pdf, hand-soldering, 3.2x2.5mm^2 package crystal Epson Toyocom FA-238 series https://support.epson.biz/td/api/doc_check.php?dl=brief_fa-238v_en.pdf, 3.2x2.5mm^2 package SMD Crystal Seiko Epson SG-8002LB https://support.epson.biz/td/api/doc_check.php?mode=dl&lang=en&Parts=SG-8002DC, hand-soldering, 14.0x8.7mm^2 package SMD Crystal TXC 7M http://www.txccrystal.com/images/pdf/7m-accuracy.pdf, hand-soldering, 3.2x2.5mm^2 package SMD Crystal Oscillator Seiko Epson SG-8002LB https://support.epson.biz/td/api/doc_check.php?mode=dl&lang=en&Parts=SG-8002DC, hand-soldering, 10.5x5.0mm^2 package SMD.

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