5VDC Miniature Piezo Passive Buzzer
This 14x4mm buzzer will require a 100 ohm resistor on the red wire to a PWM source or ac voltage in order to generate a tone. Unlike the active buzzer that only requires a constant voltage this passive buzzer will need a microcontroller to help it run.
We recommend using this product with an Arduino Uno. Excellent for a simple project use as the buzzer not that loud compared to the BUZ-120
Tutorial: http://www.instructables.com/id/How-to-use-a-Buzzer-Arduino-Tutorial/
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