Electronics Toolkit

Electronics Toolkit is a calculator app for electronics engineers, students, hobbyists and technicians. It bundles single-purpose calculators in five categories. WHAT IS INSIDE Basics. Ohm's law, power, resistor color and SMD codes, voltage and current dividers, LED resistor, AWG wire size, Wheatstone bridge, conductor resistance, E-series and parallel finders, unit converter. AC and reactive. RC and RL time constants, reactance, LC resonance, RLC impedance, RMS and peak, frequency and wavelength, decibel, power factor, transformer ratio, filter design, skin depth. Semiconductor and PCB. BJT bias, op-amp gain, Zener, 555 timer, PCB trace and via current (IPC-2221), MOSFET gate drive, LM78xx dissipation, ADC resolution, PWM, buck and boost duty cycle, LM317. Signal and timing. Crystal load, UART timing, I2C pull-up sizing, SPI margin. Power and energy. Solar sizing, battery charge time, wire voltage drop, heatsink thermal. KEY FEATURES Solver mode lets you pick the unknown variable. Engineering notation handles units. Inputs are remembered per tool. Star favorites, search by name, see recent tools, view the underlying formula, and get clear error messages instead of silent failures. For design reference and education only. Verify safety-critical work against datasheets.