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• Software (2) Calculate either the charge, capacitance or voltage across a capacitor using Q=CV. Calculate the value of a resistor needed to current-limit an LED. The hammer in any electrical engineers toolbox. Calculate voltage, resistance and current using Ohm's law. Resistor dividers are a simple, widely-used circuit primitive for reducing a voltage based on a fixed ratio. Find the closest E-series (e.g. E12, E96) resistor (preferred value) to your desired resistance. Find the right size wire gauge for a particular current and voltage drop. The low-pass RC filter is probably the simplist and most used electronic filter. Great for input signal filtering. Calculate the resistor and capacitors values for a 555 timer in astable configuration. A calculator to help you use the MP4558 IC in your next PCB. Calculates passive component values, frequencies, currents, e.t.c. A calculator for working out the impedance of a standard microstrip style track. PCB track current carrying capability calculator, using the IPC-2152 standard. PCB track current carrying capability calculator, using the IPC-2221a standard. PCB via current carrying capability calculator, using the IPC-2221A standard. Calculator the thermal resistance of a via. Calculate the dew point using the Magnus equation. Calculate the temperature, resistance (reference or actual), or beta-coefficient of NTC thermistors. This calculator can be used to calculate the values of the critical component values for a buck converter. Rotate objects in 3D using angle-axis, rotation matrices, euler angles or quaternions. Calculate CRC values from either a large number of popular CRC algorithms or define one yourself. Tool to help you design a moving average filter.