How to use a multimeter? (for Beginners)

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     Whether it be your smartphone, computer, speakers, or the common light bulb, every electrical device needs a specific amount of electricity to function. This electricity needs to be regulated to ensure your device works properly. Too much and the device breaks down; too little and it may not work at all.
A multimeter is a tool used to measure the amount of electricity going through a certain component by measuring current (amperes), electric pressure (voltage), resistance (ohms), and continuity.If you are interested in checking, troubleshooting, or designing your DIY electronics/electrical projects, a multimeter is an essential tool you must have.

   Getting Acquainted With the Multimeter

    Before measuring anything with the device, you'll first have to acquaint yourself with the common parts and functionalities of a multimeter.

       Display/Scale: A display or scale is where you will see the values ​​of your measurements.

    Rotary Switch: The rotary switch allows the user to switch between the type of measurements they are trying to test. This would include valuable measurements such as voltage, resistance, and current.

     Button: Some values provided by the rotary switch will have multiple functions. Use the function button to switch between these functions.Input Jacks: The input jacks are where you will insert your testing probes. Most multimeters will have three input jacks. Multimeters typically come with two testing probes. The black testing probe will always be inserted in the COM (common) input jack. Unless you are trying to measure current that is measurable by more than one ampere, your red testing probe should always be inserted at the rightmost input jack where it can measure voltage, resistance, continuity, and currents measurable in milliamps

     the best way to learn is by applying. Today you will learn how to use a multimeter by measuring the values of this DIY emergency modem power supply.

     The goal is simple. Take a 20-volt power tool battery and lower its voltage to meet the power requirements of a 12-volt modem. This project will use a buck converter (step-down converter), a diode, a few wires, and of course the multimeter.for those wondering, a buck converter (the circuit with a red glowing LED in the picture) is used to adjust and lower the voltage of a power source. The one in the picture is prebuilt; you

   How to Use a Voltmeter

   Voltage is one of the most common measurements you'll need to measure. Voltage is the electrical potential difference between two points. Just like the water pressure of your garden hose, voltage is the electric pressure that pushes current through the circuit.

   Let us measure the voltage by first checking if your test probe is in the default setting. The black test probe should be inserted at the COM port and the red test probe at the rightmost port. Use the rotary switch until it aligns with the symbol V (voltage).

    If you are measuring a battery powered device/circuit, make sure that the display shows the DC symbol. If you're testing anything that is not powered by a battery pack, such as a home appliance (refrigerator, washing machine, electric fan), press the function button until the display indicates it is ready to read AC current.

   Our project is powered by a power tool battery, which means we use the DC values of our multimeter. To measure how much voltage is coming out of the buck converter, touch your black test probe to the negative (-) output and the red test probe to the positive (+) output of the buck converter circuit.

    Great! Seems like the buck converter is outputting exactly the 12 volts our 12-volt modem needs. That means the buck converter doesn't need to be adjusted.

    Another item commonly measured by voltage are batteries. The picture below shows an 18650 battery providing around four volts. If the voltage shows a negative sign, that just means your test probes need to be switched around.

 

     Whether it be your smartphone, computer, speakers, or the common light bulb, every electrical device needs a specific amount of electricity to function. This electricity needs to be regulated to ensure your device works properly. Too much and the device breaks down; too little and it may not work at all.
A multimeter is a tool used to measure the amount of electricity going through a certain component by measuring current (amperes), electric pressure (voltage), resistance (ohms), and continuity.If you are interested in checking, troubleshooting, or designing your DIY electronics/electrical projects, a multimeter is an essential tool you must have.

   Getting Acquainted With the Multimeter

    Before measuring anything with the device, you'll first have to acquaint yourself with the common parts and functionalities of a multimeter.

       Display/Scale: A display or scale is where you will see the values ​​of your measurements.

    Rotary Switch: The rotary switch allows the user to switch between the type of measurements they are trying to test. This would include valuable measurements such as voltage, resistance, and current.

     Button: Some values provided by the rotary switch will have multiple functions. Use the function button to switch between these functions.Input Jacks: The input jacks are where you will insert your testing probes. Most multimeters will have three input jacks. Multimeters typically come with two testing probes. The black testing probe will always be inserted in the COM (common) input jack. Unless you are trying to measure current that is measurable by more than one ampere, your red testing probe should always be inserted at the rightmost input jack where it can measure voltage, resistance, continuity, and currents measurable in milliamps

     the best way to learn is by applying. Today you will learn how to use a multimeter by measuring the values of this DIY emergency modem power supply.

     The goal is simple. Take a 20-volt power tool battery and lower its voltage to meet the power requirements of a 12-volt modem. This project will use a buck converter (step-down converter), a diode, a few wires, and of course the multimeter.for those wondering, a buck converter (the circuit with a red glowing LED in the picture) is used to adjust and lower the voltage of a power source. The one in the picture is prebuilt; you

   How to Use a Voltmeter

   Voltage is one of the most common measurements you'll need to measure. Voltage is the electrical potential difference between two points. Just like the water pressure of your garden hose, voltage is the electric pressure that pushes current through the circuit.

   Let us measure the voltage by first checking if your test probe is in the default setting. The black test probe should be inserted at the COM port and the red test probe at the rightmost port. Use the rotary switch until it aligns with the symbol V (voltage).

    If you are measuring a battery powered device/circuit, make sure that the display shows the DC symbol. If you're testing anything that is not powered by a battery pack, such as a home appliance (refrigerator, washing machine, electric fan), press the function button until the display indicates it is ready to read AC current.

   Our project is powered by a power tool battery, which means we use the DC values of our multimeter. To measure how much voltage is coming out of the buck converter, touch your black test probe to the negative (-) output and the red test probe to the positive (+) output of the buck converter circuit.

    Great! Seems like the buck converter is outputting exactly the 12 volts our 12-volt modem needs. That means the buck converter doesn't need to be adjusted.

    Another item commonly measured by voltage are batteries. The picture below shows an 18650 battery providing around four volts. If the voltage shows a negative sign, that just means your test probes need to be switched around.