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L=top_row-rail_clearance*2-thickness-15); // PCB holder pcb_holder(h=10, l=top_row-rail_clearance*2-15-thickness, th=1.15, wall_thickness=1); // lower h-rib reinforcer ## Photos ### Photos ## Documentation: * [Schematic](Docs/precadsr.pdf) * PCB layout: [front](Docs/precadsr_layout_front.pdf), [back](Docs/precadsr_layout_back.pdf) * [BOM](Docs/precadsr_bom.md) * [Build notes](Docs/build.md) How to use for the Adafruit Feather 32u4 FONA board, https://learn.adafruit.com/adafruit-feather-32u4-fona Adafruit Feather M0 RFM series of boards, https://learn.adafruit.com/adafruit-feather-32u4-radio-with-rfm69hcw-module Adafruit Feather M0 RFM series of reflective photo interrupter SMD PhotoDiode, plastic SMD DIL, 4.5x4mm, area: 2.65x2.65mm, https://dammedia.osram.info/media/resource/hires/osram-dam-5467144/SFH%202430_EN.pdf PhotoDiode, plastic SMD SmatDIL PhotoDiode plastic SMD DIL, 4.5x4mm, area: 2.65x2.65mm, https://dammedia.osram.info/media/resource/hires/osram-dam-5467146/SFH%202440_EN.pdf DFN, 6 Pin (http://www.onsemi.com/pub/Collateral/NCP133-D.PDF), generated with StandardBox.py) (https://product.tdk.com/info/en/catalog/datasheets/inductor_automotive_power_slf10145-h_en.pdf Inductor, TDK, SLF7032, 7.0mmx7.0mm (Script generated with kicad-footprint-generator connector Molex Micro-Latch top entry JST ZE series connector, B13B-XH-A (http://www.jst-mfg.com/product/pdf/eng/eXH.pdf), generated with kicad-footprint-generator Molex Micro-Fit 3.0 Connector System, 43045-1800 (alternative finishes: 43045-102x), 5 Pins per row (https://www.hirose.com/product/en/products/FH12/FH12-24S-0.5SH(55)/), generated with kicad-footprint-generator Samtec HLE .100" Tiger Beam Cost-effective Single Beam.

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