Resources / R-02 — Electronics calculators
Tools for electronics decisions.
A growing library of single-purpose calculators that solve a real engineering decision in under a minute. Built around the questions hardware founders and electronics teams ask Ideambox every week.
Power & battery sizing
Battery pack configurator
Pack voltage, capacity, energy, and air-shipping class for any S/P arrangement of common Li-ion, LiFePO4, or NiMH cells.
Battery runtime estimator
Operating hours from capacity, load, and usable-capacity derating.
Capacitor energy & hold-up
Stored energy and ride-through time for bulk caps in brown-out scenarios.
DC-DC efficiency
Efficiency, losses, and sanity check from bench measurements.
Heatsink & junction temperature
Junction T, required heatsink RSA, and feasibility check.
Circuits & passives
Ohm's law
Solve any two of V, I, R, P. Live as you type.
Voltage divider
Compute Vout or solve R2 for a target Vout. Picks closest E12.
LED series resistor
Current-limiting R for an LED with E12 standard value and wattage.
RC time constant
Time constant, cutoff frequency, and charge times.
PCB & wiring
PCB trace width (IPC-2221)
Min width from current, copper weight, and allowed ΔT.
Wire gauge & V drop
AWG from current, length, and allowed voltage drop.
Gerber viewer
In-browser Gerber + drill review.
Package availability explorer
Mouser-backed parts search by package and stock.
Compliance & certification
§ Looking for what you need?
Suggest a tool