Buzzer 5V 12x8.5mm DIP Passive

The 5V Passive Buzzer is a widely used component for generating audible tones or alerts in electronic circuits. Unlike active buzzers, which contain a built-in oscillator, passive buzzers require an external signal to produce sound. Here's a detailed overview:

Features:

• Type: Through-hole or DIP component

• Operating Voltage: 5V DC

• Sound Output: Tone or beep, depending on the signal

• No Built-in Oscillator: Requires external signal (e.g., PWM or square wave) to produce sound

• Simple and Affordable: Ideal for low-power applications

• Common Uses: Alarms, notifications, and warning signals

Description:

This 5V passive buzzer has a small size (12mm diameter, 8.5mm height) and operates at a maximum current of 250mA. It’s widely used in portable and low-power devices, such as alarms, timers, and other devices requiring an audio output.

Working Principle:

• Electromagnetic Mechanism: The buzzer uses an electromagnet and diaphragm to generate sound. When an electrical current flows through the electromagnet, it causes the diaphragm to vibrate, producing sound waves.

• External Signal Required: Unlike active buzzers, a passive buzzer requires an external signal (e.g., a square wave) to generate sound. The frequency of the signal determines the pitch of the sound produced.

Pinout:

• Positive Pin (+): Usually the longer pin, connected to the positive voltage supply.

• Negative Pin (-): Typically the shorter pin, connected to the ground or negative voltage supply.

Applications:

• Alarms: Used in security systems, fire alarms, and other safety applications.

• Notifications: Common in electronic devices like clocks, timers, and reminders.

• Warning Signals: Used in industrial, automotive, and other critical systems for alerting purposes.

• Entertainment & Education: Can be used in toys, games, and educational projects to demonstrate sound generation.

Circuit Example:

To connect the buzzer to an Arduino, follow this simple circuit:

• Positive Pin: Connect to pin 8 on the Arduino.

• Negative Pin: Connect to GND (ground) on the Arduino.

Code Example:

No special library is needed to use the passive buzzer with Arduino. Here’s a sample code to generate different tones:

cpp
CopyEdit
int buzzerPin = 8;

void setup() {
  pinMode(buzzerPin, OUTPUT);
}

void loop() {
  tone(buzzerPin, 1000); // 1kHz tone for 500ms
  delay(500);
  noTone(buzzerPin);     // Stop the tone
  delay(500);

  tone(buzzerPin, 2000); // 2kHz tone for 500ms
  delay(500);
  noTone(buzzerPin);
  delay(500);

  tone(buzzerPin, 3000); // 3kHz tone for 500ms
  delay(500);
  noTone(buzzerPin);
  delay(500);
}

Technical Details:

• Rated Voltage: 5V DC

• Current Consumption: ≤30mA

• Sound Pressure Level: ≥85dB at 10cm

• Resonant Frequency: 2300±300Hz

• Size: Diameter 12mm, Foot Spacing 7mm, Height 8.5mm

• Operating Temperature: -20°C to 60°C

• Material: ABS Plastic

• Weight: 1.5g

Comparisons:

1. Passive vs Active Buzzers:

   • Passive Buzzer: Requires external signal (PWM or square wave), lower power consumption, and cost-effective. Sound frequency control is more flexible but requires more setup.

   • Active Buzzer: Has an integrated oscillator, simple to use with less setup, but consumes more power and has fixed frequency tones.

Package Includes:

• 1 x 5V Passive Buzzer.