Piezoelectric Buzzer 26mm – Sensor & Transducer | Compoden
Piezoelectric Sensor/Transducer/Buzzer - 26mm Diameter
This 26mm piezoelectric disc serves as both a vibration sensor and a sound transducer. Detect knocks or generate tones up to 4kHz. Reliable brass-and-ceramic construction with pre-soldered leads for quick prototyping.
Key Specifications
| Specification | Value |
|---|---|
| Diameter | 26mm |
| Resonant Frequency | 4.0 ± 0.5kHz |
| Capacitance | 20nF ± 30% at 1kHz |
| Max Input Voltage | 30Vp-p |
| Material | Brass plate, ceramic element |
| Connection | Pre-soldered wire leads (red/black) |
What You Can Build With This
- Arduino alarm system with tone output
- Knock-to-unlock door mechanism
- Piezo contact microphone for vibration logging
- Simple musical keyboard with frequency control
Compatibility
Works with 3.3V and 5V boards like Arduino Uno, ESP8266, and Raspberry Pi. For loud sound, drive through a transistor; direct pin connection yields lower volume. As a knock sensor, use analog input with a 1MΩ pull‑down resistor.
Wiring Notes
Red lead to signal, black to ground. For sensing, add a 1MΩ–10MΩ resistor between leads to prevent charge buildup. Current draw is minimal; no external power needed for basic beeps.
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 as a knock sensor (analog pin) or buzzer (digital pin with PWM). Use a 1MΩ resistor for sensing to avoid floating readings.
Can I use it as a microphone?
It captures vibrations rather than clear audio. For basic sound detection, pair with an amplifier circuit; not suitable for voice recording.
Does it need an external driver?
For loud alerts, drive it through an NPN transistor (e.g., 2N2222) with a base resistor. Direct pin connection works for quiet beeps.
📦 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