Electronics Engineering Calculators ⚡

Interactive calculation suite for Ohm's Law, Resistors, LEDs, Voltage Dividers, and Battery Life.

Calculate Voltage (V), Current (I), Resistance (R), and Power (P) using \(V = I \times R\) and \(P = V \times I\).

Voltage (V):

Current (Amperes - A):

Calculated Resistance (R):

Dissipated Power (P):

1st Digit:

2nd Digit:

Multiplier:

Tolerance:

Resistance Value:

Calculate the required series resistor value \(R = \frac{V_{cc} - V_f}{I_f}\) to prevent burning out LEDs.

Supply Voltage (\(V_{cc}\)):

LED Forward Volt (\(V_f\)):

LED Current (\(I_f\) mA):

Recommended Series Resistor:

Calculate output voltage \(V_{out} = V_{in} \times \frac{R_2}{R_1 + R_2}\) for ADC input scaling.

Input Voltage (\(V_{in}\)):

Resistor R1 (Ω):

Resistor R2 (Ω):

Output Voltage (\(V_{out}\)):

Battery Capacity (mAh):

Circuit Draw (mA):

Estimated Operating Time: