# Active vs Passive Buzzer

I recently borrowed an Arduino Inland Basic Starter Kit. It includes an active and passive buzzer. What is the difference? I can hear a difference in sound when I use the tone() command. Anything else?

How can I identify which one is which? Are there any specific commands for each one?

• Just a wild guess, but the "active" buzzer may include an oscillator, and will make a noise when connected to a DC power supply. The passive one may just be a bare transducer, and must be driven by a pulsed voltage to make a noise. – Peter Bennett Mar 24 '16 at 4:59