Tools
Tools for building and measuring
Calculators for resonant circuits, coils, antennas and safe operation, right in the browser, no account needed. Every tool shows the formula it uses, so you can check every result.
Available
In preparation
These tools are planned. You can suggest wishes and formulas you need in the forum.
Air-core coil Coils
Inductance of a single-layer solenoid from turns, diameter and length (Wheeler).
Wavelength and antenna length Antennas
λ, λ/2 and λ/4 for a frequency, with velocity factor for wire and tube.
Split ring Antennas
Rough estimate of the resonance of split rings from circumference and gap, as a starting point for measuring.
dBm converter Measuring
Convert dBm, mW, watts and voltage into 50 Ω, for spectrum analyser readings.
Capacitor discharge Safety
Stored energy, discharge time and bleeder resistor, so the capacitor bank becomes safely dead.
Spark gap Safety
Approximate breakdown voltage in air from the electrode gap, as a planning value.
Tesla coil Coils
Estimate the resonance of the secondary with self-capacitance and top load.
Field trial planner Electroculture
Randomly assign plots to treatment and control and export the measurement plan as a template.