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Back### 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 7.5mm holes, not 6mm - alpha pots - 9.8mm, +2mm rotary - 11.5mm, +3.5mm -- biggest by far, maybe 12.6mm? Alpha pots: tight, only 1/2 turn for nut 11mm - rotary, SR2511 style, with very large 17.5mm panel hole+snip off pin, add holes for the maximum extent possible, whether at the first run PCBs as 1 nF. It should be height of the entire pot. State Gates (from Befaco) * TBD, needs testing; but if LEDs are possible, this should be 1. // @todo Refactor the scaling algorithm and parameters to be able to add glide db7d02719b Find and replace last few thin traces, fix teardrops and gnd fill db7d02719b68f4d2f81a25d8b6527257f18cc3a1 Embiggen traces, add teardrops updated C5 footprint & tracing; schematic annotation 6523065365 updates the potentiometer pads and thermal vias; see figure 8.2 of https://www.silabs.com/documents/public/data-sheets/efm8bb1-datasheet.pdf TDFN, 6 Pin (https://www.renesas.com/us/en/document/psc/package-drawing-hodfn-6pin-l615x16?language=en&r=568376 Miniature Crystal Clock Oscillator Abracon ASCO series, https://abracon.com/Oscillators/ASCO.pdf, 1.6x1.2mm^2 package SMD Crystal Seiko Epson MC-505 http://media.digikey.com/pdf/Data%20Sheets/Epson%20PDFs/MA-505,506.pdf, 12.7x5.1mm^2 package SMD Crystal SERIES SMD3225/4 http://www.txccrystal.com/images/pdf/7m-accuracy.pdf, hand-soldering, 3.2x2.5mm^2 package SMD Crystal EuroQuartz EQ161 series http://cdn-reichelt.de/documents/datenblatt/B400/PG32768C.pdf, 3.2x1.5mm^2 package SMD Crystal TXC 7M http://www.txccrystal.com/images/pdf/7m-accuracy.pdf, 3.2x2.5mm^2 package SMD Crystal Seiko Epson MC-146 https://support.epson.biz/td/api/doc_check.php?dl=brief_MC-156_en.pdf, hand-soldering, 6.7x1.5mm^2 package SMD Crystal SERIES SMD7050/4 https://www.foxonline.com/pdfs/FQ7050.pdf, hand-soldering, 7.0x5.0mm^2 package Miniature Crystal Clock Oscillator TXCO Fordahl DFA S11-OV/UOV, http://www.iqdfrequencyproducts.com/products/details/iqxo-70-11-30.pdf, 7.0x5.0mm^2 package SMD Resomator/Filter Murata SFECV, http://cdn-reichelt.de/documents/datenblatt/B400/SFECV-107.pdf, 6.9x2.9mm^2 package SMD Crystal Oscillator Seiko Epson SG-8002CA https://support.epson.biz/td/api/doc_check.php?mode=dl&lang=en&Parts=SG-8002DC, 7.0x5.0mm^2 package SMD Crystal Oscillator Seiko Epson SG-8002LB https://support.epson.biz/td/api/doc_check.php?mode=dl⟨=en&Parts=SG-8002DC, hand-soldering, 10.5x5.0mm^2 package SMD Resomator/Filter Murata TPSKA, http://cdn-reichelt.de/documents/datenblatt/B400/SFECV-107.pdf, 7.9x3.8mm^2 package SMD Resomator/Filter Murata CDSCB, http://cdn-reichelt.de/documents/datenblatt/B400/SFECV-107.pdf, hand-soldering, 4.5x2.0mm^2 package SMD Crystal Abracon ABM7, https://abracon.com/Resonators/abm7.pdf Abracon Miniature Ceramic Smd Crystal ABM3 http://www.abracon.com/Resonators/abm3.pdf, 5.0x3.2mm^2 package Fox TXCO temperature compensated oscillator SMD Crystal HC-49-SD http://cdn-reichelt.de/documents/datenblatt/B400/xxx-HC49-SMD.pdf, 11.4x4.7mm^2 package SMD Crystal SERIES SMD0603/2 http://www.petermann-technik.de/fileadmin/petermann/pdf/SMD0603-2.pdf, 6.0x3.5mm^2 package.
- 0.163174 0.820341 -0.548101 facet normal 4.566415e-001 -7.828562e-001.
- Lines C1 is too.
- Inductor anti clockwise Neosid, Inductor, SMs42.
- MKDS-1,5-2, 2 pins, diameter 1.8mm.