grokkingstuff
Engineering notes, with the working shown.
This is the published half of an org-roam notes tree — mechanical engineering, CFD, electronics, and chemistry, kept the way they were worked out rather than smoothed into a textbook. Alongside the notes: a set of static calculators for the numbers that come up again and again, and write-ups from actual bench work.
Start here
- MechEFastenersOmit the thread pitch and the standard assumes a coarse pitch. Metric bolts come in coarse, fine, and extra-fine…
- CFDNumerical Schemes for CFDNumerical schemes convert continuous PDEs into algebraic equations on a discrete grid, determining accuracy,…
- ChemistryElectrochemistryThis is the landing page for the electrochemistry cluster.
- ElectronicsOptimal Control: LQR, Riccati, and the Kalman FilterAᵀP + PA − PBR⁻¹BᵀP + Q = 0.
Calculators
all 31 →
Ohm's law solver
Reynolds number & flow regime
Sprinkler & fire pump hydraulics (NFPA 13/20)
Bolt tightening torque & shear stress
PCB trace width
Compressible flow (gas dynamics)
Note graph — 122 notes · 359 links
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