Wired White
Admin
733 Activity 
Calcs
Pulse Oximeter: SpO2, Ratio of Ratios and AFE4400 Settings
Wired White v3 Calculate red/infrared AC/DC ratios and an illustrative SpO₂ estimate. Check AFE4400 TIA headroom, feedback bandwidth, sampling time and LED drive settings.
Delta-Sigma Modulator: OSR, Order, Noise Shaping and SNR
Wired White v2 Calculate delta-sigma oversampling ratio, in-band quantization noise and ideal SNR. Compare noise-shaping order and estimate the sample rate for a target SNR.
PEM Fuel Cell Stack: Polarization, Efficiency & Water
Wired White v2 Size a PEM fuel cell stack or check an existing one. Plot polarization and power, calculate HHV/LHV efficiency, hydrogen and air demand, and cathode water balance.
Battery Thermal Runaway: Cell Spacing and Barrier Margin
Wired White v2 Compare neighbor heating from one failing cylindrical cell. Screen heat-release fractions, cell spacing, cooling and effective barrier transmission with an animated thermal network.
Rack Liquid Cooling: Cold-Plate Flow, Pressure Drop and CDU Sizing
Wired White v3 Size rack cooling flow, pressure drop and pump duty. Calculate CDU exchanger approach with ε–NTU and fouling, then check the accelerator coolant inlet limit.
USB PD 3.1 EPR Cable Drop, Heating & Power Budget (48 V)
Wired White v2 Calculate USB-C cable and connector voltage drop, I²R heating and delivered power at up to 48 V and 5 A. Compare current and constant-power loads.
800 V DC Rack Power: Busbar Sizing, Losses and Fault Current
Wired White v2 Size a two-pole DC rack feeder, calculate converter and busbar losses, and explore source fault-current rise for an 800 V power architecture.
Grid-Forming Inverter: Fault Current, Synthetic Inertia & SCR
Wired White v2 Calculate external-grid SCR, inverter fault-current limits and synthetic-inertia power and energy demand. Compare dispatch headroom and usable energy during a prescribed frequency ramp.
BESS Degradation and Augmentation Planner: Fade, Top-Up and Cost
Wired White v2 Forecast BESS capacity fade, size battery top-ups by installation window, and estimate their present cost. Compare linear and compounded aging with a cohort-based schedule.
MCS Truck Charging: Cable Heat, Losses and Charge Time
Wired White v2 Estimate MCS truck charging losses, cable and contact temperatures, and charge time with copper self-heating and an adjustable cooling model.
Station Battery Sizing: IEEE 485 Duty Cycle and Margins
Wired White v2 Size a stationary lead-acid battery from its duty cycle using IEEE 485 section calculations, manufacturer Kₜ factors, random loads and temperature, aging and design margins.
Cogging Torque: Slot–Pole, Magnet Width and Skew
Wired White v3 Compare slot–pole combinations, ideal magnet-width cancellation points and continuous skew. Calculate harmonic attenuation and scale a measured or FEM torque amplitude.
Motor Thermal Network: Winding & Hot-Spot Temperature
Wired White v2 Calculate motor winding, frame and hot-spot temperatures from losses and duty cycle. Compare warm-up with the settled repeating cycle using a two-node thermal network.
Underground Cable Ampacity: Duct Banks & Burial (Neher–McGrath)
Wired White v2 Calculate continuous ampacity for equal-current single-core cables in duct banks or direct burial, including mutual heating, sheath losses and a rectangular backfill envelope.
Heat Exchanger Calculator: LMTD, NTU, Shell-and-Tube & Plate
Wired White v2 Size or rate shell-and-tube and plate heat exchangers with calculated LMTD correction, NTU effectiveness, Kern and Martin estimates, and temperature profiles.
Walk-In Cooler & Cold Room Load Calculator
Wired White v2 Size walk-in cold room refrigeration from insulation, humid-air door openings, product cooling, respiration and defrost. Compare daily duty with peak pull-down capacity.
Motor Shaft Voltage & Bearing Currents Calculator
Wired White v3 Estimate shaft voltage, bearing voltage ratio and bearing currents in inverter-fed motors. Compare insulation, grounding brushes and common-mode filtering.
Motor Thermal Protection, Stall Time & Voltage Unbalance
Wired White v3 Model motor thermal capacity over starts, overloads and cooling. Compare hot/cold stall limits and estimate negative-sequence heating and voltage-unbalance derating.
Neutral Grounding Resistor Sizing: Current, Rating and Detection
Wired White v3 Size an NGR from fault current or assess an existing resistor. Check 3·I_c0, hot-current detection, short-time energy and relay grading—and compare with 400 A.
VFD Cable Length, Peak Voltage and dv/dt Filter Selection
Wired White v4 Compare VFD cable reflections and dv/dt filters with motor RPDIV and IEC insulation stress categories. Explore peak voltage, rise-time reserve and electrical life sensitivity.
Substation Grounding Grid: Touch, Step, GPR and Conductor Size
Wired White v3 Calculate substation grid resistance, GPR, mesh and step voltages, tolerable limits and copper conductor size. Compare grid spacings using a uniform-soil IEEE 80 method.
Transformer Differential Protection (87T): Slope & Harmonics
Wired White v3 Match transformer CT ratios and vector-group phase shift, plot a dual-slope 87T characteristic, and check through faults, internal faults and harmonic blocking.
PDN Target Impedance and Decoupling Capacitor Planner
Wired White v2 Size a three-value decoupling bank using target impedance, ESR, ESL and mounting inductance. Plot impedance, find anti-resonance peaks and estimate capacitor counts.
Green Hydrogen from PV: Electrolyser Size and Cost
Wired White v3 Size a solar-fed electrolyser using hourly PV power and minimum-load limits. Estimate hydrogen output, curtailment and levelized cost with your own costs.