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I want to know the voltage (tension) of every of my components. I have leds, a buzzer, a piezo, a photoresistor, a rain sensor and more.

I have a multimeter and I would like to use it to measure the voltage of the components. I know how to measure current and resistance but not voltage yet.

I want to start measuring the leds. I know they are around 2 volts, but I want to measure them exactly with a multimeter.

This is my multimeter: Multimeter

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  • \$\begingroup\$ "tension" sounds like a mistranslation. Tension is what happens if you pull on something. It's a physical force and not something one really cares about when doing electric.. \$\endgroup\$
    – ratchet freak
    Commented Oct 14, 2017 at 15:50
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    \$\begingroup\$ Tension (English) = Tensione (Italian) = Voltage (English). And an other one: Tension (English) = Tensión (Spanish) = Voltage (English). There are many more, for example: Tension (English) = Spannung (German) = Voltage (English). That multimeter is one of the cheapest multimeters there is, I paid less than 2 dollars for it. If you want to measure voltage, put the black wire in "COM", the red wire in "VΩmA" and turn the dial to a range in the DCV, try to measure the voltage of a battery. \$\endgroup\$
    – Jot
    Commented Oct 14, 2017 at 15:53
  • \$\begingroup\$ I am going to buy a Fluke multimeter, but I have to decide which model to buy (there is a lot). \$\endgroup\$
    – Roby Sottini
    Commented Oct 14, 2017 at 16:29
  • \$\begingroup\$ @Jot You can add Swedish to the list too and perhaps mention British high tention overhead lines for electricity distribution. \$\endgroup\$
    – winny
    Commented Oct 15, 2017 at 9:57
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    \$\begingroup\$ Don't buy a Fluke multimeter UNTIL you can use that one properly ie all its functions... \$\endgroup\$
    – Solar Mike
    Commented Oct 15, 2017 at 9:59

1 Answer 1

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You can only measure the voltage of a device that generates a voltage (such as a battery).

Some devices, like LEDs, have a fixed voltage at which they operate, and for that you can pass a fixed current through it within the specifications and measure the voltage dropped across it.

Similar for other devices - have them working in a circuit and measure the voltage dropped across it - however that isn't the specified voltage, only the voltage it is running at for that specific scenario.

To find out the voltage limit you instead need to consult the datasheet for the device. That will tell you all you need to know.

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