35mm Piezoelectric Sensor/Transducer/Buzzer - Vibrating Disc for Projects
35mm Piezoelectric Disc ā Sounder & Vibration Sensor for DIY Projects
This 35mm piezoelectric disc works as both a sounder (buzzer) and a vibration sensor. When driven with an AC signal, it produces clear tones for alarms or musical notes. In reverse, it generates a voltage when tapped, making it useful for knock sensors or contact mics. A versatile component for Arduino, Raspberry Pi, and general electronics prototyping.
Key Specifications
| Specification | Value |
|---|---|
| Diameter | 35 mm |
| Resonant Frequency | 2.6 kHz Ā± 0.5 kHz |
| Capacitance at 1 kHz | 25 nF Ā± 30% |
| Max Operating Voltage | 30 Vp-p |
| Material | Brass plate, ceramic element |
| Operating Temperature | -20Ā°C to +70Ā°C |
What You Can Build With This
- Arduino tone generator with simple PWM output
- Knock sensor for security systems or interactive projects
- Contact microphone to capture acoustic vibrations
- Electronic doorbell or alarm buzzer circuit
Compatibility
Works directly with 5V microcontrollers like Arduino Uno, Nano, and Mega. For louder output, pair with a transistor driver circuit from a 3.3V board like ESP32 or Raspberry Pi Pico. The disc can also interface with Raspberry Pi via a simple ADC for vibration sensing.
Wiring Notes
For sound output, connect the ceramic side to a PWM-capable pin through a 1kĪ© resistor, and the brass disc to ground. A protective diode is not needed for low-voltage driving. When using as a sensor, wire in parallel with a 1MĪ© resistor to bleed off charge.
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, connect to any PWM pin with a resistor for buzzer functions, or use as an analog input with a pull-down resistor for knock sensing.
Can I use this as a microphone?
It can act as a contact microphone; attach to a surface to detect vibrations, but output voltage is low and needs an amplifier for audio recording.
How loud is this buzzer?
When driven at resonance with a full 5V square wave, it produces around 80 dB at 10 cm ā comparable to a standard sounder but without a built-in oscillator.
š¦ Free Setup Handoff Document Included
Every Compoden order includes a free setup handoff document ā 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 ā it knows every Compoden kit this part appears in.
Shipping Information
- Prepaid Orders: ā¹75 for orders up to ā¹999, FREE shipping above ā¹999
- COD Orders: ā¹125 shipping + ā¹50 COD fee = ā¹175 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