念慈菴

Passive buzzer minimum module (low level trigger)

 
Overview

The passive buzzer does not have an oscillation source inside, so a DC signal cannot make it buzz. It must be driven by a 2K~5K square wave. The sound frequency is controllable, and it can make "do (many), re (come), mi" (meter), fa (fa), sol (suo), la (pull), si (west)" effect.

  1. Driven by S8550 transistor.
  2. PCB size is 1.3cm*1.7cm.
  3. Taobao similar links
参考设计图片
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