How to Calculate the Voltage Gain of a Low-Pass Filter?

Answer Engineers design low pass filters around a cutoff frequency. The filter will pass all signals with frequencies below the cutoff frequency and block all signals with frequencies above the cutoff fre... Read More »

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How to Add a Pass Transistor to a Voltage Regulator?

By adding a pass transistor to an existing three-terminal voltage regulator, you can increase its current output. Electronics designers favor three-terminal regulators, such as the LM7805 and LM317... Read More »

How to Calculate LED Voltage?

Learn to calculate the voltage of a light emitting diode (LED) to test for a malfunction. A LED acts as a current valve in a circuit, only letting electricity flow in one direction. When electricit... Read More »

How to Calculate Voltage?

Calculating volts or voltage is easiest by using Ohm's law. Ohm's law explains the relationship that exists between current, voltage, and resistance while outlining a series of formulas for calcula... Read More »

How to Calculate Instantaneous Voltage?

Many circuits experience a time delay between the time a voltage is applied and the time that voltage appears at the circuit. This time delay happens because capacitors in the system have to first ... Read More »