BUZ-12054P Passive Piezoelectric Buzzer 44x14mm , with Wires

Price:
US$1.36
BUZ-12054P
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This is a 44 X 14mm piezoelectric passive buzzer which requires an AC signal to make a sound. 
 
This is nicely enclosed with wires so you can attach easily. Piezo elements convert vibration to voltage or voltage to vibration. That means you can use this as a buzzer for making beeps, tones and alerts and you can use it as a sensor, to detect fast movements like knocks. Unlike the active buzzer that only requires a constant voltage this passive buzzer will need a microcontroller to help it run. It is like an electromagnetic speaker, where a changing input signal produces the sound, rather than producing a tone automatically.
 
Specifications:
  • Rated Voltage: 10 Vp-p square wave
  • Operating Voltage: 3~30
  • Rated Current: 11 mA(Max)
  • Sound Output at 10cm: 85dBA(Min)
  • Resonant Frequency: 1100±300 Hz
  • Capacitance at 120Hz: 77000±30% pF
  • Operating Temp.: -20~ +60
  • Storage Temp.: -30~ +70
  • Weight: 10g
  • Dimension: 44 X 14mm (D X H)
Notice for California Residents: Warning symbolWARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov