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Spacing amount for vertical columns of stuff col_left = thickness * 1; right_rib_x = width_mm - hole_dist_side - thickness; // draw a "vertical" wall to mount the circuit board to, dead center // pcb_holder(h=10, l=top_row-rail_clearance*2-15-thickness, th=1.15, wall_thickness=1); // lower h-rib reinforcer ## Photos [to be added] ## 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 the 4 pins module CMS SOT223 5 pins, pitch 5mm, size 22.3x14mm^2, drill diamater 1.15mm, pad diameter 2.5mm, hole diameter 1.2mm, length 11.3mm, width 3.0mm solder Pin_ diameter 1.0mm, wire diameter 1.0mm wire loop with bead as test Point, diameter 3.0mm 2 pins LED diameter 3.0mm z-position of LED center 1.0mm 2 pins LED, diameter 8.0mm, 3 pins Ceramic Resomator/Filter Murata CDSCB, http://cdn-reichelt.de/documents/datenblatt/B400/SFECV-107.pdf, 4.5x2.0mm^2 package SMD Crystal Oscillator Seiko Epson SG-8002CA https://support.epson.biz/td/api/doc_check.php?mode=dl⟨=en&Parts=SG-8002DC, 7.0x5.0mm^2 package Abracon Miniature Ceramic SMD Crystal G8, 3.2x1.5mm^2 package SMD Crystal EuroQuartz MT series http://cdn-reichelt.de/documents/datenblatt/B400/MT.pdf, 3.2x2.5mm^2 package SMD Crystal Oscillator Seiko Epson SG-8002JC 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 EuroQuartz MT series http://cdn-reichelt.de/documents/datenblatt/B400/MT.pdf, hand-soldering, 3.2x2.5mm^2 package SMD Crystal Oscillator Seiko Epson SG-210 https://support.epson.biz/td/api/doc_check.php?mode=dl⟨=en&Parts=SG-210SED, 2.5x2.0mm^2 package SMD Crystal Oscillator Seiko Epson MC-505 http://media.digikey.com/pdf/Data%20Sheets/Epson%20PDFs/MA-505,506.pdf, 12.7x5.1mm^2 package SMD Crystal Seiko Epson SG-8002LB https://support.epson.biz/td/api/doc_check.php?mode=dl⟨=en&Parts=SG-8002DC, hand-soldering, 3.2x2.5mm^2 package crystal Epson Toyocom TSX-3225 series https://support.epson.biz/td/api/doc_check.php?dl=brief_fa-238v_en.pdf, 3.2x2.5mm^2 package SMD Crystal G8, hand-soldering, 3.2x1.5mm^2 package SMD Crystal SERIES SMD7050/4 https://www.foxonline.com/pdfs/FQ7050.pdf, hand-soldering, 7.0x5.0mm^2 package Ultraminiature Crystal Clock Oscillator Abracon ASE series, http://www.abracon.com/Oscillators/ASEseries.pdf, 3.2x2.5mm^2 package crystal Ceramic Resin Sealed SMD http://www.foxonline.com/pdfs/fe.pdf, 7.5x5.0mm^2 package SI570, SI571, Programmable oscillator, Standard SI570 SI571 Programmable oscillator Standard SMD Crystal Qantek QC5CB, https://www.qantek.com/tl_files/products/crystals/QC5CB.pdf 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 SERIES SMD3225/4 http://www.txccrystal.com/images/pdf/7m-accuracy.pdf, 3.2x2.5mm^2 package SMD Crystal SERIES SMD7050/4 https://www.foxonline.com/pdfs/FQ7050.pdf, 7.0x5.0mm^2 package SMD Crystal Oscillator Seiko Epson SG-210 https://support.epson.biz/td/api/doc_check.php?mode=dl⟨=en&Parts=SG-210SED, hand-soldering, 2.5x2.0mm^2 package crystal Ceramic Resin Sealed SMD http://www.foxonline.com/pdfs/fe.pdf, 7.5x5.0mm^2 package crystal Ceramic Resin Sealed SMD http://www.foxonline.com/pdfs/fe.pdf, hand-soldering, 7.5x5.0mm^2 package crystal Ceramic Resin Sealed SMD http://www.foxonline.com/pdfs/fe.pdf, 7.5x5.0mm^2 package SI570, SI571, Programmable oscillator, Standard SI570 SI571 Programmable oscillator Standard SMD Crystal Oscillator Seiko Epson MC-506 http://media.digikey.com/pdf/Data%20Sheets/Epson%20PDFs/MA-505,506.pdf, hand-soldering, 12.7x5.1mm^2 package SMD Crystal FC-135 https://support.epson.biz/td/api/doc_check.php?dl=brief_FC-135R_en.pdf SMD Crystal SERIES SMD2520/4 http://www.icbase.com/File/PDF/HKC/HKC00061008.pdf, 5.0x3.2mm^2 package Miniature Crystal Clock Oscillator EuroQuartz XO91 series, http://cdn-reichelt.de/documents/datenblatt/B400/XO91.pdf, 7.0x5.0mm^2 package.

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