Main difference between an Active buzzer and a Passive buzzer

The main difference between an active buzzer and a passive buzzer lies in how they are controlled and generate sound:

1. Active Buzzer

• Internal circuit: Contains an internal oscillating circuit, which allows it to produce sound on its own.
• Control: Requires only a DC power supply (typically 5V or 3.3V) to start generating sound.
• Sound generation: When voltage is applied, it emits a continuous tone at a fixed frequency.
• Ease of use: Simpler to use because it doesn’t require external circuitry to control the frequency.
• Application: Ideal for situations where you need a steady, consistent sound like alarms.

2. Passive Buzzer

• No internal circuit: Does not have an internal oscillating circuit, so it relies on an external source to generate a signal.
• Control: Requires an external oscillating signal (e.g., from a microcontroller) to produce sound. The sound frequency can be controlled by changing the frequency of the input signal.
• Sound generation: More versatile, as you can create different tones by changing the signal's frequency.
• Ease of use: Slightly more complex to use since it needs a signal to function.
• Application: Suitable for applications where you want to control the tone or melody.

Summary:

• Active buzzer: Self-contained, produces sound with just power applied, easier to use.
• Passive buzzer: Requires an external signal to generate sound, offers more control over tone.