In this video, electrical engineer Barron Stone demonstrates how to measure alternating current (AC) signals using a digital multimeter (DMM). Learn the meaning of root-mean-square (RMS) voltage and how it relates to DC voltage.
- [Narrator] The most common source…of alternating current is a wall outlet,…and I can use my digital multimeter to measure the voltage…of that AC signal.…Now before I go any further,…I want to make it clear that the voltages used…in power outlets are high enough to be dangerous,…so you should never stick anything…into a wall outlet that's not designed for it.…The specific DMM I'm using is rated…to measure voltages up to 600 volts,…which is well over the voltage of this power outlet.…To measure the voltage…of an alternating current source,…I'll start by connecting the black probe…to the center COM port,…and the red probe the right port,…which includes a V for voltage.…
Next, I'll need to turn the selector knob…to the AC voltage mode,…which is represented on my multimeter…with the letter V and a squiggly line.…Since I'm in the United States…where the power outlets operate around 120 volts AC,…I've selected the 200-volt range for this measurement,…because it's the smallest range…that exceeds my expected value.…If I was in another country…
- Reading electrical schematics
- Building circuits on breadboards
- Reviewing types of static and variable resistors
- Reading resistor color codes
- Measuring resistance with a DMM
- Measuring resistive sensors with an Arduino microcontroller
- Making electrical signal measurements with an oscilloscope
- Measuring AC voltage with a DMM
- Understanding the time domain and frequency domain
- Designing passive low-pass and high-pass filters
- Reviewing reactive RC and RL circuits
- The relationship between capacitors and inductors
Skill Level Beginner
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Learning Arduino: Pulse Width Modulationwith Rae Hoyt1h 16m Intermediate
1. Building Circuits
Read electrical schematics6m 25s
3. Resistive Circuits
4. Oscilloscope Measurements
6. Alternating Current
7. Electrical Signals
8. Reactive Circuits
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