Op-Amp Gain and Bandwidth Calculator
Wired White v1 Calculate inverting, non-inverting, difference and summing gain. Check bandwidth, slew rate, output swing and DC errors with a schematic and animated sine.
Circuits and electronics
Wired White v1 
RC, LC & Sallen-Key Filter Designer with Bode Plot
Wired White v1 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.
Metal Detector Coil Calculator and PI Pulse Timing
Wired White v1 Size a pulse-induction coil, estimate resonance and damping, compare recovery with target decay, and explore calibrated air range versus coil diameter.
LoRa Airtime, Duty Cycle & Battery Cost: Spreading Factor Planner
Wired White v1 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.
LoRa & Meshtastic Link Budget and Fresnel Zone Calculator
Wired White v1 Estimate LoRa link margin, Fresnel clearance and ridge diffraction. Compare free space with Hata models and check dated regional power and airtime presets.
RLC Circuit Response Calculator
Wired White v1 Calculate RC, RL, and series or parallel RLC step responses, Bode plots, resonance, Q, and damping. Animate the transient and inspect voltage and current.
PCB Trace Width Calculator — IPC-2221 & IPC-2152
Wired White v1 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.
Smith Chart Impedance Matching Calculator: L, Pi and T
Wired White v1 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.
PCB Impedance: Microstrip, Stripline, Coplanar & Differential Pairs
Wired White v1 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.
2D FDTD Simulator: Yee Grid, TMz Waves and PML Boundary
Wired White v1 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.
LED Resistor Calculator: Strings and LED Strip Voltage Drop
Wired White v1 Size LED series resistors and parallel strings, then plan 12/24 V strip feeds, voltage drop, brightness uniformity, cable size and power supplies.
RC low-pass filter
Wired White v1 Calculate the cutoff, gain, phase, Bode response, and step response of a passive first-order RC low-pass filter.
