Available Calculators

FET temperature rise

Electronics

Current multiplied by Rds,on multiplied by thermal impedance. Don't forget to use an Rds,on appropriate to your temperature.

\(T_j = I^2 * R_{ds} * Z_{th} + T_a\)
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Filtered Voltage Divider

Electronics

This formula calculates the cutoff frequency of the RC voltage divider using the equivalent resistance of the top and bottom resistors in parallel. The solution is approximate. This approximation assumes: No load on the divider node. Ideal source. No series resistance before the divider. Capacitor ESR negligible.

\(f_c = \frac{1}{2 \times 3.14159 \times \left( \frac{R_{TOP} \times R_{BOT}}{R_{TOP} + R_{BOT}} \right) \times C_{FILT}}\)
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LC Tank Circuit - Resonant Frequency

Electronics

Calculates the resonant frequency of an ideal LC tank circuit. This frequency represents the natural oscillation point where inductive and capacitive reactances are equal in magnitude. Useful for filter design, EMI analysis, and stability evaluation in power electronics and signal applications.

\(f_0 = \frac{1}{2*3.14159*\sqrt{L*C}}\)
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Ohms Law

Electronics

No description

\(V = I * R\)
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Parallel Resistor Calculator (2 resistors)

Electronics

No description

\(\frac{1}{R_{total}} = \frac{1}{R_1} + \frac{1}{R_2}\)
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RC integrator step - positive

Electronics

Computes the first-order exponential delay of an RC network to reach a defined switching threshold following a step change in input voltage. Output t_d is the time at which the capacitor voltage equals V_target.

\(t_d = R C \ln\!\left( \frac{V_{start} - V_{final}}{V_{target} - V_{final}} \right)\)
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RC Low Pass Filter

Electronics

This formula calculates the cutoff frequency of an RC low pass filter, which determines the frequency at which the output signal begins to attenuate.

\(f_c = \frac{1}{2 * 3.14159* R C}\)
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RC Voltage Decay

Electronics

No description

\(V(t) = V_0 e^{-t/(R C)}\)
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Resistor Power (Current)

Electronics

No description

\(P = I^2 R\)
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Resistor Power (Voltage)

Electronics

No description

\(P = \frac{V^2}{R}\)
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Voltage Divider

Electronics

Standard resistive voltage divider.

\(V_{out} = V_{in} \frac{R_2}{R_1 + R_2}\)
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Watts Law

Electronics

No description

\(P = I * V\)
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Ideal Gas Law

Physics

No description

\(P V = n R T\)
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Hours Tracker

No description

\(k = m+t+w+h+f\)
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Voltage Divider with Gain

No description

\(V_{out} = (V_{in} \frac{R_2}{R_1 + R_2}) * G\)
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