3.3-5V Passive Low Level Trigger Buzzer Alarm Sound Module
$5.99
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Description This is a passive buzzer module, which includes a passive buzzer and a PNP transistor to amplify the signal. An active buzzer has a built-in oscillating source, so it will make sounds when electrified. But a passive buzzer does not have such source, so it will not beep if DC signals are used; instead, you need to use square waves whose frequency is between 2K and 5K to drive it. Specification Supply Voltage: 3.3V and 5V; PCB Size: 32 x 14mm Input: Low level trigger No oscillation source,need square wave(frequency 2K-5K ) to drive Please Access the Online Tutorial for 3.3-5V Passive Low Level Trigger Buzzer Alarm Sound Module Package List Passive Buzzer Sensor Module x 1
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