Labels Milestones
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- Ovals PCB layout: [front](Docs/precadsr_layout_front.pdf), [back](Docs/precadsr_layout_back.pdf) * [BOM](Docs/precadsr_bom.md) .
- (http://www.ti.com/lit/ds/symlink/opa330.pdf, http://www.ti.com/lit/an/snva009ag/snva009ag.pdf Texas Instruments, DSBGA, 0.9x1.4mm, 6 bump.
- | TL074 | Quad.
- -2.699214e-04 facet normal 0.0376334 -0.272864 0.961316.
- 4.70228 20 facet normal -0.4714 0.88192 -2.43656e-06.