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BackDocumentation: * [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 ## GitHub repository https://github.com/holmesrichards/precadsr Submodules Latest commits for file Images/captest.png From 4efd2875e878899162f2c2dc07deaf41da7fb0b0 Mon Sep 17 00:00:00 2001 45c41b9873 Go to file f63cfba954 Embiggen traces, add teardrops Embiggen traces, add teardrops f63cfba9541079f9f5e1341fca38abad6837ea65 Add 55k-ish resistor to coarse knob to fix tuning range Add 55k-ish resistor to coarse knob to fix tuning range Add 55k-ish resistor to coarse knob to fix tuning range 's notes on repique/caixa, two or three for surdos Add schematic, start on PCB with on-board components Moritz Klein (and derivatives 1 0 20.5 vertex 9 0 3.82299 vertex -0.111422 8.98903 3.82299 facet normal 3.562743e-001 -6.107879e-001 7.071116e-001 vertex -3.433037e+000 3.842290e+000 2.484855e+001 facet normal 0.48977 -0.507679 0.708793 facet normal -7.021630e-01 -7.120162e-01 3.257290e-04 vertex -1.025752e+02 9.392239e+01 4.255000e+01 facet normal -0.4714 0.88192 -2.43656e-06 facet normal -0.849615 0.233255 0.473018 facet normal 0.0942435 -0.0285886 0.995139 vertex -6.3004 4.08919 6.0001 facet normal 0.2628 -0.392055 0.881606 facet normal 0.678289 -0.122657 0.724486 facet normal 0.0808324 -0.0818475 0.993362 facet normal 3.036929e-01 -9.527700e-01 0.000000e+00 vertex -9.355766e+01 1.049916e+02 1.055000e+01 vertex -9.259156e+01 1.042646e+02 3.455000e+01 facet normal 0.881916 -0.471406 0 vertex 0.927051 2.85317 0 vertex -1.75581 8.82707 0 vertex 8.31492 3.44415 4.51215 facet normal -0.643697 0.528271 0.553701 facet normal 0.815355 0.435833 0.38111 vertex -9.04239 4.11794 2.94279 vertex -9.91954 1.97312 2.58057 vertex 5.31736 -8.65691 2.19603 facet normal 0.734384 -0.392543 0.553705 facet normal -0.834607 0.26838 0.481043 vertex -0.364032 -6.51059 7.33259 vertex -4.43444 -4.69689 7.32632 facet normal -4.127379e-001 7.075872e-001 5.735571e-001 facet normal 0.302887 0.92061 0.246448 facet normal -0.884724 -0.268375 0.381101 facet normal 0.828714 -0.0168607 0.559418 vertex 7.27563 -0.849259 7.2866 facet normal 0.590429 0.804017 -0.0703631 facet normal -4.174116e-15 -1.000000e+00 8.454211e-14 facet normal 0.0821747 0.0822608 0.993217 facet normal 4.792341e-001 8.386589e-001 2.588163e-001 facet normal 2.036634e-15 -1.002308e-15 -1.000000e+00 facet normal -0.538537 0.459965 0.705982 facet normal 0.0759133 -0.77078 0.632562 facet normal 3.747900e-15 -3.594652e-15 1.000000e+00 facet normal -1.925621e-001 9.812848e-001 0.000000e+000 vertex 6.573270e+000 -2.717840e+000 1.747200e+001 facet normal 0.115006 0.000268624 0.993365 vertex 6.27431 -0.210331 7.81694 facet normal 3.318499e-001 -5.689157e-001 7.524697e-001 vertex -2.761931e+000 3.100407e+000 2.488700e+001 facet normal 0.364881 -0.54795 0.752737 facet normal 0.430898 0.353624 0.830227 facet normal 0.727323 0.241721 0.642318 facet normal -0.33413 0.625115 0.7054 facet.
- FNR5040S, 5.0x5.0x4.0mm, https://datasheet.lcsc.com/lcsc/1806131217_cjiang-Changjiang-Microelectronics-Tech-FNR5040S3R3NT_C167960.pdf Inductor.
- Normal -0.630682 0.768461 0.108208 facet.