Passive Buzzer Module

Features
1. A passive buzzer that needs square signals of 2k-5k to drive, for it has no built-in oscillating source, and then makes sounds when energized.
2. Use an S8550 PNP transistor for drive.
3. Controllable sound frequency – it can make the buzzer beep like Do, Re, Mi, Fa, Sol, La, Ti.
4. Working voltage: 3 - 5V; PCB size: 2.0 x 2.0 cm.
5. With power light and indicator of digital signal output.

Active Buzzer Module

Features
1. BUILT-IN OSCILLATING SOURCE – Produces sound once connect to power.
2. LOW LEVEL TRIGGER - A single low level can make the buzzer beep.
3. ANTI-REVERSE PORT - Provides a firm connection.
4. INDICATORS - With power light and indicator of digital signal output.

Working voltage: 3 - 5V
SIZE - PCB Size: 2.0 x 2.0 cm

For more info, please refer to http://wiki.sunfounder.cc/index.php?title=Buzzer_modules

Loudspeaker 0.5W 8Ω

  • Sound transducer type loudspeaker
  • Loudspeaker type miniature, mylar, general purpose
  • Power 0.5W
  • Maximum power 1W
  • Impedance 8Ω
  • Body dimensions Ø28 x 4.7mm
  • Operating temperature -10...40°C
  • Sound frequency 300...6000Hz
  • Sound level 81dB
  • Resonant frequency 400Hz
  • Diameter 28mm
  • Impedance tolerance ±15%
  • Sound output tolerance ±3dB
  • Weight 6g
  • Height 4.9mm
  • Resonant frequency tolerance ±20Hz
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