Engineering
Electronics and circuits, microfluidics, fluid mechanics and ideal gases.
- AWG gauge: diameter, section and metric equivalentAWG gauge to diameter and cross-section, or a diameter in mm to the closest AWG, by the exact formula of the standard.
- Battery runtimeAh to Wh, a battery’s runtime under a load or the capacity to plan, with usable share and efficiency.
- Cable sizing and voltage dropA cable’s voltage drop (ΔU = 2ρLI/S) or the cross-section to plan, copper or aluminium, cold or under load, with the recommended commercial size.
- Electricity consumptionAn appliance’s power and usage time in kilowatt-hours and cost: per day, over the period, and as a yearly projection.
- Ohm’s law and power: U, I, R, PAny two of voltage, current, resistance and power give the other two.
- RC circuit charge and discharge calculatorTime constant τ (tau), voltage and current at a given instant, charge, energy, and the time to reach a target voltage.
- Resistor colour code calculator, reading and lookupA 4 or 5 band code to its value, or the bands of a wanted value, projected onto the normalised E24 or E96 series.
- Resistors and capacitors in series and parallelEquivalent resistance or capacitance in series or parallel, and the voltage divider, with the series/parallel duality and the effect of a load on the output.
Fluids
2 tools
- Brownian diffusion simulator (1D random walk)Simulated 1D Brownian diffusion: seeded random walkers, histogram against the Gaussian N(0, 2Dt), 2σ envelope, mean squared displacement tracked.Provisional
- Tank residence time and rinsingResidence time of a tank (τ = V/Q), rinsing time for a target reduction, or flow for a given τ.
Microfluidics
2 tools
- Concentration gradient generatorA microfluidic Christmas-tree network solved exactly: concentration and flow rate of every outlet, pressure drop and a per-stage mixing criterion.Provisional
- Microfluidic channel calculatorHydraulic diameter, mean velocity, hydraulic resistance and pressure drop of a rectangular microfluidic channel.Provisional