---
product_id: 12793506
title: "50 Pack - 27mm Piezo Discs with 3-Lead Wires for Hartley Oscillator/Buzzer/Alarm Circuit/Feedback Loop"
brand: "audiowell"
price: "฿2474"
currency: THB
in_stock: true
reviews_count: 1
category: "Audiowell"
url: https://www.desertcart.co.th/products/12793506-50-pack-27mm-piezo-discs-with-3-lead-wires-hartley
store_origin: TH
region: Thailand
---

# 4.6KHz resonant frequency 27mm precision size 3-lead feedback electrode 50 Pack - 27mm Piezo Discs with 3-Lead Wires for Hartley Oscillator/Buzzer/Alarm Circuit/Feedback Loop

**Brand:** audiowell
**Price:** ฿2474
**Availability:** ✅ In Stock

## Summary

> 🔊 Elevate your sound game with precision piezo power!

## Quick Answers

- **What is this?** 50 Pack - 27mm Piezo Discs with 3-Lead Wires for Hartley Oscillator/Buzzer/Alarm Circuit/Feedback Loop by audiowell
- **How much does it cost?** ฿2474 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.co.th](https://www.desertcart.co.th/products/12793506-50-pack-27mm-piezo-discs-with-3-lead-wires-hartley)

## Best For

- audiowell enthusiasts

## Why This Product

- Trusted audiowell brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Plug & Play Leads:** 100mm wires for easy integration into any project
- • **Precision Resonance:** Tuned at 4.6KHz ±0.5KHz for crystal-clear sound output
- • **Reliable Capacitance:** Stable 20,000pF at 1KHz ensures consistent performance
- • **Dual-Mode Functionality:** Use as a standard piezo disc by simply disconnecting the blue lead
- • **Versatile 3-Lead Design:** Innovative feedback electrode for advanced buzzer and alarm circuits

## Overview

This 50-pack of 27mm piezo discs features a unique 3-lead design including a feedback electrode, optimized for buzzer, alarm, and oscillator circuits. With a resonant frequency of 4.6KHz and stable capacitance, these discs offer versatile, plug-and-play integration for professional-grade electronic projects.

## Description

These 27mm discs feature a feedback electrode and 3.93" (100mm) leads. Feedback Electrodes are used to construct buzzers, but do not have to be used. To use these in the more conventional sense (pickups, mics, etc..), simply leave the blue lead disconnected. Resonant Frequency 4.6KHz. Resonant Resistance 300 ohm max. Capacitance 16,000pF +/- 30%.

Review: Great Product - GREAT PRODUCT Install easily, WORK GREAT

## Features

- 3 Lead Piezo discs are used to construct Buzzers/Alarms
- The "3rd Lead" is on the Feedback Electrode
- Can be used as a standard piezo disc (eliminate blue connection)
- Resonant Frequency: 4.6KHz +/- 0.5KHz
- Capacitance @ 1KHz: 20,000pF

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B00DH2V494 |
| Best Sellers Rank | #455,548 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #75 in Piezo Transducers |
| Customer Reviews | 5.0 5.0 out of 5 stars (1) |
| Date First Available | June 18, 2013 |
| Item Weight | 3 ounces |
| Item model number | gddsg187 |
| Manufacturer | Audiowell |
| Package Dimensions | 10 x 7 x 1 inches |

## Product Details

- **Body Material:** Brass
- **Color:** Brass
- **Included Components:** 3 Lead Piezo discs, 3.93" (100mm) leads
- **Manufacturer:** Audiowell
- **Material:** Brass, Ceramic, Copper Wire

## Images

![50 Pack - 27mm Piezo Discs with 3-Lead Wires for Hartley Oscillator/Buzzer/Alarm Circuit/Feedback Loop - Image 1](https://m.media-amazon.com/images/I/91KkrLBI-8L.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Great Product
*by T***8 on August 29, 2016*

GREAT PRODUCT Install easily, WORK GREAT

## Frequently Bought Together

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**Shop now:** [https://www.desertcart.co.th/products/12793506-50-pack-27mm-piezo-discs-with-3-lead-wires-hartley](https://www.desertcart.co.th/products/12793506-50-pack-27mm-piezo-discs-with-3-lead-wires-hartley)

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*Product available on Desertcart Thailand*
*Store origin: TH*
*Last updated: 2026-04-23*