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

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...
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http://www.ehow.com/how_8511340_calculate-voltage-gain-lowpass-filter.html

## 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...
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http://www.ehow.com/how_6385889_add-pass-transistor-voltage-regulator.html

## 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...
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http://www.ehow.com/how_8494269_calculate-led-voltage.html

## 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...
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http://www.ehow.com/how_6390404_calculate-voltage.html

## How to Calculate Theory Voltage?

In theory, the product of a system's voltage and current is its power rating. In practice, the voltage acting on the system will be slightly more than this relationship suggests. Some electric ener...
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http://www.ehow.com/how_8516451_calculate-theory-voltage.html