Test with a multimeter

Passive buzzer

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Now: Coil resistance

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Pin 1: Pin 1 (marked +) (1) Pin 2: Pin 2 (2)

Red probe Not connectedBlack probe Not connected

Hold the probe and drag it to the tip of a leg. Tapping works too: first pick the probe, then the leg.

Set the range to Ω (resistance).

Measure step by step

This guide uses an electromagnetic passive buzzer: it has a coil inside and its DC resistance does not exceed a few tens of ohms. A piezo type shows OL on the Ω range. The multimeter does not test the sound; if you apply DC you only hear a click, and it needs a square wave to sound.

  1. 1Coil resistance
  2. 2Continuity