How to Test Cell Phone Battery with Multimeter
A multimeter can measure the voltage of a removable cell phone battery, but it cannot confirm the battery’s remaining capacity or predict its runtime. Most smartphone batteries are single-cell lit...
How To Test A Temperature Gauge With A Multimeter
A multimeter can help diagnose an inaccurate car temperature gauge, but it usually does this by testing the engine coolant temperature sensor and its wiring. On many modern vehicles, the dashboard ...
How to Test a Subwoofer with a Multimeter
A subwoofer is a speaker designed to reproduce low-frequency sound. When it stops producing clean bass, a multimeter can help you check whether the voice coil has an open circuit or an electrical s...
How to Test Audio Signal With Multimeter
An audio signal can be checked with a multimeter, but the meter will not show the complete waveform or reveal every type of distortion. It is most useful for checking AC signal voltage, DC offset, ...
How To Test An AC Capacitor With A Multimeter
To test an AC capacitor with a multimeter, disconnect the equipment from every power source and verify that it is de-energized. Safely discharge the capacitor, then isolate it from the circuit. Mea...
Why Digital Multimeter Accuracy and Precision Matter
Digital multimeters are used to measure voltage, current, resistance, and other electrical values. For reliable results, the meter must be accurate enough for the job, and the user must understand ...
How to Test Solar Panels with a Multimeter
What can a multimeter tell you about a solar panel? A digital multimeter can show whether a solar panel is producing open-circuit voltage and short-circuit current. These two readings do not replac...
How To Test A Watch Battery With A Multimeter
If your watch has stopped, the battery is usually the first thing to check. A digital multimeter can help you confirm whether the battery still has usable voltage before you replace it or assume th...
How To Test Trailer Brakes With A Multimeter
If you tow a trailer with electric brakes, a multimeter can help you check whether the brake circuit is getting power and whether the brake magnets are within a normal range. This test is useful, b...