Piezoelectric Buzzer 35mm – Sound Sensor & Transducer
Piezoelectric Buzzer 35mm – Sound Transducer & Vibration Sensor
The piezoelectric buzzer is a 35mm diameter brass/ceramic disc that converts electrical signals into sound or mechanical vibrations, and vice versa. It is commonly used for generating alert tones, playing simple melodies, or sensing knocks and vibrations in electronic projects. Its wide operating voltage and resonant frequency make it suitable for battery-powered devices and microcontroller-based circuits.
Key Specifications
| Specification | Value |
|---|---|
| Diameter | 35 mm |
| Resonant Frequency | 4.2 ± 0.5 kHz |
| Capacitance | 30 nF ± 30% |
| Max Input Voltage | 30V p-p |
| Material | Brass substrate with ceramic coating |
| Lead Wire Length | ~100 mm |
What You Can Build With This
- Arduino alarm system with tone generation
- Knock sensor for secure access control
- Electronic doorbell with custom melodies
- Simple vibration detector for machine monitoring
Compatibility
This piezo element works with any microcontroller or single-board computer that can generate a square wave signal, such as Arduino Uno, ESP32, or Raspberry Pi. It can be driven directly from a GPIO pin with a small resistor in series, or via a transistor for higher volume. Operating voltage is typically 3V to 30V peak-to-peak, so it is compatible with both 3.3V and 5V logic levels.
Wiring Notes
Connect the red wire to the signal pin and the black wire to ground. For sound generation, produce a square wave at the resonant frequency (around 4 kHz) using Arduino's tone() function. When used as a sensor, the piezo generates a small voltage when vibrated; add a 1MΩ resistor in parallel to allow the charge to dissipate and protect the input pin.
Why Buy from Compoden
Every component is sourced from verified suppliers and tested for compatibility before listing. We've spent 10 years building projects for makers, schools, and institutions across India. Ships from Bengaluru in 3-5 days. If defective on arrival, replace within 7 days.
Is this compatible with Arduino?
Yes, it works directly with Arduino boards. Use the tone() function on a digital pin to generate sounds; no additional driver is needed for low-volume applications.
Can this piezo buzzer be used as a vibration sensor?
Absolutely. When subjected to vibration or shock, the piezo disc produces a small voltage that can be read by an analog input pin, making it useful for knock sensors or motion alarms.
What is the difference between a buzzer and a transducer?
A buzzer contains an internal oscillator circuit and only needs DC voltage to produce a fixed tone, while this transducer requires an external AC signal to generate sound, offering more control over the frequency and melody.
📦 Free Setup Handoff Document Included
Every Compoden order includes a free setup handoff document — step-by-step instructions to get your component working within minutes. Download it via QR code on your package. The handoff document is also trained to help you troubleshoot the majority of problems.
Ask Soldr above what you can build with this — it knows every Compoden kit this part appears in.
Shipping Information
- Prepaid Orders: ₹75 for orders up to ₹999, FREE shipping above ₹999
- COD Orders: ₹125 shipping + ₹50 COD fee = ₹175 total
- Delivery Timeline: Dispatch in 1-2 days, delivery in 2-7 days depending on location
Returns & Warranty
- 7-Day Return: Manufacturing defects only (approval required)
- Warranty: 7 days from delivery
- Non-Returnable: Batteries, consumables, cut wires, clearance items