This Piezo Alarm is a great option for when you need an audible alarm (or are just looking for a way to prank your friends). This alarm has 16 different output options that can be changed with the DIP switches on the unit. Select Continuous, Chime, Intermittent, Warble, or Pulsating and amaze your friends.
Operating Voltage: 5-16Vdc
Operating Frequency: 3KHz
Warble Frequency: 2.8KHz to 3.2KHz
Diameter: 35.8mm, Height 35.7mm
103 dB(A) at 16V at 61cm
90 dB(A) at 5V at 61cm
This 3KHz Piezo Alarm is a great option for when you need a loud audible alarm (or are just looking for a way to prank your friends). This alarm produces a 3KHz at up to 100dB(A) and has an input range of 3V to 18V.
3V to 18V input
25.1mm diameter, 22.2mm height
100 dB(A) at 18V at 61cm
78 db(A) at 3V at 61cm
This is a small 12mm round speaker that operates around the audible 2kHz range. You can use these speakers to create simple music or user interfaces.
This is not a true piezoelectric speaker but behaves similarly. Instead of a piezoelectric crystal that vibrates with an electric current, this tiny speaker uses an electromagnet to drive a thin metal sheet. That means you need to use some form of alternating current to get sound. The good news is that this speaker is tuned to respond best with a square wave (e.g. from a microcontroller).