Multimeter is an electronic measuring tool that combines several meter functions into one device.
What it measures:
Voltage (V): AC or DC. Check batteries, outlets, circuits
Current (A): How much electricity is flowing. Usually mA and A ranges
Resistance (Ω): Tests if a circuit is complete, checks resistors, finds broken wires
Continuity: Beeps when there’s a complete path. Quick way to find breaks
Extras on many models: Diode test, capacitance, frequency, temperature with probe
Two types:
Digital multimeter (DMM): LCD display, most common now. Accurate, easy to read
Analog multimeter: Needle gauge, old-school. Still used for watching fluctuating signals
Key parts:
Dial: Selects what you’re measuring and the range
Probes: Red = positive, Black = common/ground. Plug into ports for different tests
Display: Shows the reading