Buzzer

Passive beer characteristics:

1. Does not have an internal power source, so it requires 2K ~ 5K square waves to drive it and cannot be activated with a DC signal.

2. Audio sound can be controlled to achieve the “Dalai Mofa Sorayi” effect.

3. In specific cases, a control port with LED can be reused.

Active beer characteristics:

1. Has an internal power source and can be activated by electricity.

2. Convenient program control, allowing a single-chip machine to produce sound with high and low levels, which a passive beer cannot accomplish. are:

1 There is a source of shocks inside the source bee, so it will be called as long as it is electric

2 The program control is convenient, and a single -chip machine can make a sound with a high and low level, but the passive beever cannot be done.