how to measure ripple voltage using multimeter

| |

If you’ve ever wanted to measure ripple voltage using a multimeter, here’s a quick and easy guide. Just follow these simple steps and you’ll be measuring ripple voltage like a pro in no time!


Ripple voltage is an important parameter to consider when selecting a power supply for your electronic project. Ripple voltage is caused by the varying output of the rectifier diodes in the power supply, and it can introduce noise into your circuit and cause damage to sensitive electronic components. In this guide, we will show you how to measure ripple voltage using a multimeter.

What is Ripple Voltage?

Ripple voltage is the AC component of a DC voltage. In other words, it is the variation in voltage over time caused by the AC component of the DC signal. Ripple voltage is typically measured in millivolts (mV) or percentage.

There are two main types of ripple voltage: peak-to-peak ripple voltage and RMS ripple voltage.

Peak-to-peak ripple voltage is the difference between the maximum positive peak and the maximum negative peak of the AC component. RMS ripple voltage is the root mean square (RMS) value of the AC component.

To measure ripple voltage, you will need a multimeter. First, set your multimeter to AC Volts. Then, touch one probe to the positive lead and one probe to the negative lead of your DC power supply. The multimeter will then display the amplitude of the AC component on its screen.

Why is it Important to Measure Ripple Voltage?

Ripple voltage is a type of AC voltage that is often found in electronic circuits. It can be caused by a variety of factors, such as power supply noise, AC coupling, or inductive loading. Ripple voltage can have a significant impact on circuit performance, so it is important to measure it in order to ensure that the circuit is operating correctly.

There are a few different ways to measure ripple voltage, but the most common method is to use a multimeter. To measure ripple voltage with a multimeter, set the multimeter to the AC voltage setting and connect the leads to the two points where you want to measure the voltage. The multimeter will then give you a reading of the rms (root mean square) value of the ripple voltage.

It is also important to note that ripple voltage is usually expressed as a percentage of the DC voltage. For example, if you are measuring ripple voltage on a 12 V DC power supply, and you get a reading of 2 V AC, then the percentage of ripple voltage would be 2/12 = 0.167%.

How to Measure Ripple Voltage Using a Multimeter

Ripple voltage is the alternating current (AC) component of a DC (direct current) voltage waveform. It is caused by the charging and discharging of storage elements in the power supply, such as capacitors and inductors. Ripple voltage can also be caused by AC line current being rectified by a power supply’s diodes. The amount of ripple voltage present in a power supply’s output is determined by the design of the power supply, the type and amount of filtering used, and the load on the power supply.

Ripple voltage can be measured using a multimeter set to AC voltage mode. The multimeter should be connected to the power supply’s positive and negative output terminals. The voltage reading will fluctuate as the ripple voltage waveform passes through zero volts. The peak-to-peak ripple voltage can be calculated by multiplying the RMS (root mean square) value of the AC voltage reading by 1.414 (the square root of two).

Tips for Accurate Ripple Voltage Measurements

1. Use a Digital Multimeter: A digital multimeter (DMM) is the best type of meter to use when trying to accurately measure ripple voltage. This is because DMMs have a much higher input impedance than analog multimeters (AMM), which means that they will load down the power supply under test far less, and thus not distort the measurement as much.

2. Set the multimeter to AC voltage: Make sure that the multimeter is set to measure AC voltage, as ripple voltage is an AC signal.

3. Use a high input impedance setting: As mentioned above, using a high input impedance setting on the multimeter will help to minimize loading of the power supply under test, and thus result in a more accurate measurement.

4. Connect the leads directly to the power supply output terminals: Ripple voltage is typically very low in magnitude, so it is important to connect the leads directly to the power supply output terminals in order to minimize any losses that might occur due to resistance in the leads or connections.

5. Be sure to take multiple measurements: Taking multiple measurements and averaging them will help to ensure accuracy.

How to Reduce Ripple Voltage

There are a few different ways to reduce the amount of ripple voltage in your circuit. One way is to use a larger capacitor. The capacitor will store more charge and therefore be able to supply the load with charge for a longer time. This will reduce the amount of time that the voltage is below the minimum voltage (the ripple voltage).

Another way to reduce ripple voltage is to use a higher inductance coil. The coil will store more energy and therefore be able to supply the load with energy for a longer time. This will also reduce the amount of time that the voltage is below the minimum voltage (the ripple voltage).


To conclude, in order to measure ripple voltage using a multimeter, it is necessary to first identify the DC voltage level present on the line being evaluated. Once this has been determined, the AC voltage scale can be used to measure the amplitude of the ripple. It is important to note that the AC voltage scale on most multimeters is not linear, so proper selection of the range is important to get an accurate reading.


how to measure static electricity with a multimeter

how to measure frequency without multimeter


Leave a Comment