Electrical Tools

Practical electrical engineering tools for electricians, engineers, and hobbyists. Calculate voltage, current, resistance and power using Ohm's law and the power wheel, decode 4, 5 and 6-band resistor color codes and vice versa, calculate proper resistor values and wattage for LED circuits, compute voltage divider output voltage, calculate capacitance, charge, energy and impedance, estimate battery runtime from mAh capacity and consumption, determine proper wire gauge by current, length and voltage drop, calculate power factor, real, reactive and apparent power, compute 555 timer output frequency and duty cycle, and calculate inductance, inductive reactance and stored energy.