PROJECTTINKER
[ 14 ]lab · simulations

Circuit basics

Ohm's law and power solved from any two of the four; a loaded voltage divider with E-series hints and the loading error a real input adds; a series resistor sized for an LED with a power-rating warning; and an RC time constant and charge curve.

lab · sims · circuit basics

Gear train →Ratio, direction, planetary. Stepper torque/speed →Pull-out torque curve. Battery / power budget →Duty cycle to runtime. Thermal →Junction temperature and margin.

The basics [ live ]

Set any two of V, I, R, P with their sliders or number boxes - V and I first, since that is the pair with values to start. The other two are solved. Clear a field (in its number box) to make it the unknown again.

—V
—I
—R
—P

Switch tabs above to change which section's fields show here.

Assumptions and limits. Ideal components throughout - no LED knee resistance, no source impedance on the divider's input, no ESR on the capacitor. "Loading error" is exact for a purely resistive load; a real ADC input adds its own sample-and-hold capacitance, which this does not model. The resistor power-rating warning is a 50% derating rule of thumb against the stated rating, not a manufacturer's safe-operating-area curve. E-series hints are nearest-by-ratio, not confirmation that a supplier actually stocks that value.