Arduino can be done with a lot of interactive work, the most common and most commonly used is the sound and light show in front has been LED lights are used in the experiments, we let the experiment circuit sound, a voice of the most common. Component is the buzzer and speaker, and comparison of the two buzzer easier and ease the present study, we buzzer.
Here the “source” does not mean power. But rather refers to the shock source. In other words, the active internal buzzer with shock source, so only Will be called to an energized. The passive internal sources without shocks, so if a DC signal can not make it tweet. Must 2K ~ 5K square ave to Drive it. Buzzer often than passive expensive, because there multiple oscillator circuit.
