Circuit and RF design: RC, LC and Sallen-Key filters with Bode plots, op-amp gain and bandwidth, RLC response, LED resistors and strip voltage drop, PCB trace width and impedance, Smith chart matching, LoRa airtime and link budgets, metal detector coils and a 2D FDTD field simulator. Each calc shows its method and published sources.
Wired White v2 Compare an LDO, synchronous buck and buck followed by an LDO. Calculate losses, junction temperature, PFM ripple, PSRR filtering and battery runtime, with a voltage–load selection map.
Wired White v2 Calculate semiconductor laser threshold current, relaxation oscillations and intrinsic modulation bandwidth. Explore frequency response and animate a small current-step transient.
Wired White v2 Calculate two-user NOMA rates, power allocation and Jain fairness. Compare manual or equal-rate allocation with OMA and explore residual SIC interference.
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.
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.
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.
Wired White v2 Design low-pass and high-pass RC, RL, LC and Sallen-Key filters. Select E-series components and compare Bode plots, step response and cutoff tolerance bounds.
Wired White v2 Size a pulse-induction coil, estimate resonance and damping, compare recovery with target decay, and explore calibrated air range versus coil diameter.
Wired White v2 Compare SF7–SF12 airtime, bit rate, link gain, hourly duty budget and battery cost per message. Enter your regional limit and device currents; optionally estimate ALOHA overlap.
Wired White v2 Estimate LoRa link margin, Fresnel clearance and ridge diffraction. Compare free space with Hata models and check dated regional power and airtime presets.
Wired White v2 Design L, Pi and T networks for complex loads. Animate each element on a Smith chart, compare both L solutions, and check bandwidth, finite-Q losses and E-series rounding.
Wired White v2 Find trace width or edge spacing for 50 Ω lines and 90/100 Ω differential pairs. Compare copper, dispersion and coplanar-ground effects on your stackup.
Wired White v2 Animate TMz waves on an 80×80 Yee grid with graded PML or reflecting PEC walls. Calculate the Courant time step, PML conductivity, ideal reflection and residual field energy.
Wired White v2 Size LED series resistors and parallel strings, then plan 12/24 V strip feeds, voltage drop, brightness uniformity, cable size and power supplies.
Wired White v2 Calculate inverting, non-inverting, difference and summing gain. Check bandwidth, slew rate, output swing and DC errors with a schematic and animated sine.
Wired White v2 Calculate RC, RL, and series or parallel RLC step responses, Bode plots, resonance, Q, and damping. Animate the transient and inspect voltage and current.
Wired White v2 Size copper PCB traces from current, temperature rise, copper weight and layer. Compare the IPC-2221 legacy formula with the named SMPS.us IPC-2152 baseline fit.
Wired White v1 Calculate the cutoff, gain, phase, Bode response, and step response of a passive first-order RC low-pass filter.
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