Active 5V Buzzer
by Generic
SKU: PSA-CMP-BUZZER-ACT
No reviews yetTypical India street price
₹10–₹25
Onboard oscillator — HIGH = beep. PSA Lab alarm.
Interface: Digital
Active buzzers want ON/OFF; passive buzzers need tone/PWM.
Signal → D8 (GPIO15)
Blockly: set_buzzer, tone
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Concept
Active = built-in oscillator. Passive = you must PWM a tone.
A little theory
Piezo disc + driver. Frequency fixed (~2 kHz). In the classroom, treat Active 5V Buzzer as a beginner part using Digital. Typical India street price is about ₹10–₹25. Always verify voltage and pin labels on your exact module — silk screens vary across clones. Start with a datasheet or trusted learn guide, power the part correctly, share GND with the MCU, and test with a simple blink/read sketch before building the full project. Measure voltages with a multimeter when something fails, and keep actuator current off the MCU regulator.
How it works in a project
digitalWrite HIGH/LOW. Transistor if current > pin budget.
Classroom & project use
- Alarm
- Quiz wrong/right
- Parking beep
Buying in India
Precautions
- Check active vs passive
- Long beeps annoy the next class
Specifications
| Type | Active (self-drive) |
| Voltage | 5V |
| Category | LEDs & Indicators |
| Difficulty | Beginner |
| Interface | Digital |
Pinout
See module silkscreen: typically VCC, GND, and signal pins. Confirm labels against the seller photo — clones vary.
