MB27A - 27mm Average Continuous 1.5V to 27V DC

12v Mini Square Siren 12V Mini Square Siren is a compact and reliable audio alert device designed to produce loud warning sounds in a variety of systems and applications. This siren operates on a standard 12 V DC supply, making it suitable for automotive, security, alarm, and industrial use. It solves the need for a simple yet effective audible alert, ideal for installers, technicians, hobbyists, and makers who require a clear sound signal in their projects or safety systems. Perfect for both professional setups and DIY electronics, this mini square siren can be integrated into vehicle alarms, home security systems, factory warning circuits, and other alerting applications where sound notification is needed. Its small size and straightforward installation allow users to deploy it easily in tight spaces, and its dependable performance ensures consistent alerts, enhancing safety and awareness in your systems.

12 Volt Piezo Buzzer Plate (25mm) A 12 Volt Piezo Buzzer Plate (Small) is a device that uses the piezoelectric effect to measure pressure, acceleration, strain or force by converting them to an electrical charge These devices can be used both as sensors and actuators, so they're referred to as transducers, a term applied to any device that can convert one form of energy to another. The sensor turns mechanical energy into electric potential, and the actuator converts electrical energy into mechanical force or motion. The Piezoelectric material used here, ceramic lead zirconate titanate known as PZT has the ability to provide twice the voltage of Quartz under a given force. These transducers are simple, reliable, and very robust, and so find wide use in industry, medicine, and aero-space work. They're unaffected by external electromagnetic fields, and so can be used in applications where electronic sensors would fail. They are stable over a broad range of temperatures, but may be effected by long use at high temperatures. If you want to use this Piezo Buzzer Plate to make small piezo electric generator, for that you will need switch , wires and diodes .

12V Mini Ambulance Siren Siren is a noisemaking device producing a piercing sound of definite pitch. This is a 12 Volt Mini Siren which can be used in your project for alarm purpose Though is called “Mini Siren” there is nothing mini about it the sound is ear-deafening and turn this ON at your own risk. If you are tired of an old buzzer and want something with loud noise then this is the siren for you. This Product Known as Mini Horn Alarm Siren, Sound Alarm DC 12V, Sounder 12V -Siren, 12V Mini Siren Sounder, Sound Alarm System, 12V Horn Siren, Mini DC 12V Horn Siren, 12V Small Mini Siren Alarm Application: Home Security System Vehicle Security Fire Alarms Intruder Alarms Burglar Alarm

12V Mini Police Siren This is a 12 Volt Mini Police Siren, which can be used in your project for alarm purposes. Though it is called “Mini Siren”, there is nothing mini about it. The sound is ear-deafening, and turn this ON at your own risk. If you are tired of an old buzzer and want something with a loud noise, then this is the siren for you. This 12V Police Siren Buzzer is an ideal replacement for your DIY car alarm system or any other vehicle security device. The 12V Police Siren Buzzers are made using high-quality materials and components. They have been built to last and will provide years of reliable service. Application: Home Security System Vehicle Security Fire Alarms Intruder Alarms Burglar Alarm

SmartElex Speaker Module – Digital Audio & Buzzer for Arduino and DIY Projects The SmartElex Digital Speaker Module is a compact and versatile speaker module that delivers clear sound output for a variety of electronic and DIY applications. Designed with dual functionality, it works both as a high-fidelity speaker and as a buzzer, allowing you to easily add sound alerts, tones, and music to your projects. Whether you’re building an interactive robot, a notification system, or a sound-based educational tool, this module ensures crisp and reliable audio performance in a small footprint. Thanks to its Arduino compatibility and simple interface, connecting the SmartElex Digital Speaker Module to your microcontroller is quick and straightforward. It operates efficiently between 2.0V and 5.5V and features an integrated volume control for easy sound adjustment. With its durable construction, compact 40mm x 40mm size, and built-in vibration motor, it’s perfect for hobbyists, students, and professionals looking to bring sound and motion to life in their electronic designs. Features: Dual-function module: works as both a speaker and buzzer. Compact 40mm x 40mm design ideal for space-saving projects. Wide operating voltage range of 2.0V–5.5V for flexibility. Integrated potentiometer for volume control. Includes 2x JST-SH ports for easy connections. Built-in LRA vibration motor for tactile feedback. Fully Arduino-compatible for quick prototyping and integration.

37 in 1 Sensors Kit Compatible With Arduino This 37 in 1 sensors kit is supplied with a variety of sensors that are compatible with Arduino Boards . This is the most complete performance starter Arduino sensor kit with all the essential Arduino sensors. This 37 in 1 Arduino Sensor Kit Includes a variety of sensors such as a Joystick, Relay, Sound Sensors (big and small), Tracking Sensor, Flame Sensor, RGB LED Module, Linear Hall Sensor, Touch Sensor, Digital Temperature Sensor, Buzzer Module, and many more. If you want to learn about microcontrollers and sensors then this 37 in 1 Sensor Kit is ideal for start with microcontrollers and sensors. Project Tutorial for the Sensors Learning kit: This Arduino sensor kit is designed and curated to create and build various innovative projects. These projects are helpful and act as a learning element for the students. Some of the DIY projects along with the tutorial blog and video are mentioned below: DIY Automatic Sanitizer Dispenser DIY Line Follower Robot DIY Obstacle Avoider Robot car Read our blog Smart Dustbin Arduino detailing Arduino code for making a smart dustbin. Features: The Ultimate Arduino Sensor Kit contains 37 sensor modules for the Arduino UNO R3, MEGA, and NANO. This 37 in 1 sensors kit is ideal for a wide range of DIY projects and robotic science projects. This kit is compatible with Arduino, Raspberry Pi, and other microcontrollers. The sensor kit is suitable for both beginners and specialists. Perfect for getting started with microcontrollers and sensors. Read our blog explaining the classification of sensors in iot various sensors used in Internet of Things (IoT) applications. Learning Outcomes from 37-in-1 Sensors Kit for Arduino Understand how different sensors work and interact with the environment. Learn to connect and interface multiple sensors with Arduino boards. Develop coding skills using Arduino IDE to read and process sensor data. Explore real-world applications of sensors in automation and IoT projects. Gain experience in debugging and troubleshooting hardware connections. Strengthen problem-solving skills through hands-on project building. Build a strong foundation in embedded systems and electronics concepts. Encourage creativity by designing custom sensor-based projects. Example Projects Using 37-in-1 Sensors Kit Temperature and Humidity Monitoring System Automatic Street Light using LDR Sensor Obstacle Avoidance Robot Fire Detection and Alarm System Smart Dustbin using Ultrasonic Sensor Motion-Activated Security System Sound-Activated LED Lighting Gas Leak Detection System Digital Thermometer Display on LCD Line Following Robot Light-Tracking Solar Panel Smart Parking System Water Level Indicator Intruder Alert System using PIR Sensor Rain Detection and Alert System Applications: DIY Automatic Sanitizer Dispenser DIY Line Follower Robot DIY Obstacle Avoider Robot car Smart Dustbin Arduino project Innovative projects and experiments in the fields of robotics, IoT, and automation. Can be used for teaching tools in schools, universities, and maker spaces. Sensor-based projects such as home automation and environmental monitoring are being prototyped and developed. Creating interactive art installations or displays that react to external cues. Experimenting with sensor data gathering and processing for scientific or experimental purposes. Developing IoT devices to monitor and regulate characteristics like as temperature, humidity, light levels, and motion detection.

35mm Piezoelectric Sensor without Wire A piezoelectric transducer converts mechanical force into electrical output. When the force is applied to stretch or bend it, an electric voltage is generated. If there is no stress, no charges are induced. When there is stress, positive charges are induced on one side and negative charges are induced on the opposite side. Compression occurs in the crystal as the force is applied. This 3.5 cm Piezo Buzzer is made of excellent materials, with wear resistance and shock resistance. Good, durable, High sensitivity, three specifications are complete. It is widely used in: fire lights, control boards, small home computers, printers, copiers, alarms, electronic toys, automotive electronic equipment, telephone timers, control boards and other electronic products as voice devices Applications: Used in Power Shoes Used in Condition Monitoring Pacemaker Security Alarm Systems Check out: 12 Volt Piezo Buzzer Plate (20mm)

3.3V Small Piezo Buzzer This is a 3.3V buzzer - a piezoelectric audio signalling device. It can be easily used with 9v Battery or any other Microcontroller. The items Listed here are for Hobby Electronics /DIY activities. The product is really good quality at all working and of high stability. The shell is of great strength and can protect the internal structure well. read our blog explaining How to use a Buzzer with Arduino , which provides a comprehensive guide on incorporating a buzzer into Arduino projects. It covers the basics of what a buzzer is, and how it works with Arduino. Features: Voltage: Operates at 3.3 volts. Type: Piezo buzzer. Sound Output: Produces a loud sound, ideal for alarms and notifications. Power Consumption: Low power consumption, making it efficient for battery-operated projects. Size: Compact and small, easy to integrate into various projects. Durability: Designed to be durable and reliable for long-term use. Applications: Suitable for electronic projects, alarms, timers, and other devices requiring an audible alert. Applications: Alarms: Used in security systems, fire alarms, and other alert systems. Timers: Integrated into kitchen timers, countdown timers, and other timing devices. Electronic Projects: Ideal for DIY electronics, Arduino projects, and educational kits. Notifications: Used in devices that require audible alerts, such as doorbells and reminder systems. Toys: Incorporated into electronic toys to produce sound effects. Medical Devices: Used in medical equipment for alerts and notifications. Automotive: Employed in car alarms and other vehicle alert systems.

SQR117 - 24V DC Square Siren Siren is a noisemaking device producing a piercing sound of definite pitch. This is a SQR117 - 24V DC Square Siren which can be used in your project for alarm purpose Though is called “Mini Siren” there is nothing mini about it the sound is ear-deafening and turn this ON at your own risk. If you are tired of an old buzzer and want something with loud noise then this is the siren for you. Applications: Security appliances Can be used in Bicycles Household appliances Electronic alarm

Active Buzzer Module 3.3V-5V An Active Buzzer Alarm Module for Arduino is an audio signaling device, which may be mechanical, electromechanical, or piezoelectric. Just like what you are viewing now, it is a 3.3V-5V DC Electronic Part Active Buzzer Module. Using top-quality material, it is durable in use. An 5V active buzzer rings out as long as it is electrified. Compared with a passive buzzer, it is a bit expensive but easier to control. Typical uses of buzzers include alarm devices, timers, and confirmation of user input such as a mouse click or keystroke. Module Interface Specification (3-wire) + External 3.3V-5V voltage (can be directly connected with the 5v and 3.3v MCU MCU) – External GND out external microcontroller IO port. Learn how to connect a Buzzer to Arduino . Applications: The 5V buzzer can be used in making Fire Alarm using Arduino Security System Audio signaling device Alarm Timers

6-12V Piezo Buzzer (Big) Use this economical piezo-electric buzzer in experiments that require a doorbell or buzzer. This electric buzzer works off 6-12V volts. We recommend our 6-volt or 9-volt battery. A Piezo buzzer is an electronic device commonly used to produce sound. Lightweight, simple construction and low price make it usable in various applications like car/truck reversing indicators, computers, call bells, etc. It is the phenomenon of generating electricity when mechanical pressure is applied to certain materials and vice versa is also true. Such materials are called piezoelectric materials. Piezoelectric materials are either naturally available or manmade. Piezoceramic is a class of manmade material, which poses a piezoelectric effect and is widely used to make a disc, the heart of a piezo buzzer. When subjected to an alternating electric field they stretch or compress, in accordance with the frequency of the signal thereby producing sound. The piezo buzzer produces sound based on the reverse of the piezoelectric effect. The generation of pressure variation or strain by the application of an electric potential across a piezoelectric material is the underlying principle. These buzzers can be used to alert a user of an event corresponding to a switching action, counter signal, or sensor input. They are also used in alarm circuits. check out : TREASURE HUNT USING ESP32 (BLE SCANNER) Features: Wired Plastic Shell Active Piezo Electronic Alarm Buzzer Operates in a wide range of voltage (9V to 24V) Long life and stable performance Lightweight with a simple construction Piezoceramic material used for the disc, providing piezoelectric effect Produces sound based on the reverse of the piezoelectric effect Applications: Alerting or alarming circuits DIY projects requiring an audible alert IoT (Internet of Things) applications Security systems for audible warnings Use in conjunction with switches or sensors for immediate attention

Arduino Ek Innovation Kit The Arduino Ek Innovation Kit is complete electronics and IoT starter pack designed for students, hobbyists, and innovators to bring their creative ideas to life. Powered by the Official Arduino UNO EK R4 WiFi, this kit includes a wide range of sensors, actuators, and modules such as the DHT11 temperature & humidity sensor, HC-SR04 ultrasonic sensor, PIR motion sensor, IR proximity sensor, ADXL345 accelerometer, SG90 servo motor, and more. With additional essentials like a breadboard, jumper wires, LEDs, switches, keypad, and resistors, this kit provides everything you need to explore robotics, home automation, AIoT projects, and hands-on STEM learning. Whether you are a beginner experimenting with basic circuits or an advanced maker working on innovative prototypes, the Arduino Ek Innovation Kit is the perfect companion for your journey from concept to creation. What You Will Learn from this Kit? How to program and control the Official Arduino UNO R4 WiFi Interfacing and working with sensors (temperature, humidity, motion, ultrasonic, light, proximity, accelerometer) Building automation projects using relays, buzzers, and LEDs Controlling actuators like servo motors for robotics applications Designing IoT-based projects with WiFi-enabled Arduino Basics of circuit prototyping using breadboards, jumper wires, resistors, and switches Hands-on experience in STEM concepts including electronics, coding, and real-world problem solving

3-24V Active Piezo Electronic Buzzer with Continuous Sound Alarm Tone 3-24V Active Piezo Buzzer is a compact and reliable sound device designed for stable performance across a wide range of electronic applications. With a working voltage of 3–24V DC and a rated voltage of 12V DC, this piezo electronic buzzer delivers a loud 85–95dB continuous sound while consuming just 10mA of current. Built with an integrated design of a multivibrator, piezoelectric chip, and resonator, it ensures long service life and consistent operation. Lightweight and easy to install with a simple 2-wire connection, this piezo buzzer is ideal for both DIY and professional projects. It is widely used in computers, printers, alarms, copiers, timers, automotive electronics, telephones, and electronic toys, making it a versatile and dependable choice wherever a clear audio alert is needed. Features: Durable & Reliable – Built with stable construction for long service life and consistent performance. Wide Voltage Range – Operates smoothly on DC 3–24V with low power consumption (only 10mA). Loud & Clear Sound – Produces a strong 85–95 dB continuous alarm tone for effective alerts. Easy to Use – Features a complete drive circuit, works directly from a DC power source. Simple Installation – Comes with 2 mounting holes and 2-wire pigtails for quick setup. Versatile Applications – Suitable for alarms, computers, printers, copiers, electronic toys, automotive devices, timers, and DIY electronics.

MB35L - 35mm Loud Continuous Buzzer 1.5V to 15V DC A buzzer is a small yet efficient component to add sound features to our project/system. It is a very small and compact 2-pin structure hence can be easily used on breadboards, Perf Board and even on PCBs which makes this a widely used component in most electronic applications. There are two types of buzzers that are commonly available. The one shown here is a simple buzzer which when powered will make a Continuous Beep. Sound due to the internal oscillating circuit present inside it. But, the one shown here is most widely used because it can be customized with the help of other circuits to fit easily in our application. Applications: Electrical alarms Educational purposes Security applications Electronic Metronomes Household applications

Passive Buzzer Module 3.3V-5V DC Elevate your projects with the Passive Buzzer Module for Arduino. This module adds a new dimension to your creations by producing adjustable tones between 1.5 to 2.5 kHz. With easy installation featuring a pin pitch of 2.54mm and fixed bolt holes, it seamlessly integrates with microcontrollers like Arduino, opening up creative possibilities for alarms, digital toys, and various electronic projects. Crafted from high-quality plastic, this module ensures durability and reliability, making it a valuable addition to your electronic toolkit. The operating voltage of 3.3V-5V DC adds to its versatility, suitable for a wide range of applications. Whether you're a hobbyist, electronics enthusiast, or engaged in DIY projects, the Passive Buzzer Module is a must-have for enhancing your creations. Made to meet the highest standards, this buzzer for Arduino module is the perfect solution for those seeking an easy-to-use, durable, and versatile passive buzzer. Add the Passive Buzzer Module for Arduino to your toolkit today and bring your electronic projects to life. Passive buzzer module interfacing with Arduino Features: Operating Voltage: 3.3V-5V DC Material: Plastic Compatibility: Arduino and other microcontrollers Tone Range: 1.5 to 2.5 kHz Installation: Pin pitch of 2.54mm, fixed bolt holes Versatile Functionality: Produces adjustable tones for alarms, digital toys, and electronic projects Durable Build: Crafted from high-quality plastic for longevity Applications: Alarms: Ideal for creating audible alerts in various applications. Digital Toys: Enhance interactive experiences in toys with adjustable tones. Electronic Projects: Versatile use in DIY electronics, adding sound elements. Printers: Can be integrated for signaling or notification purposes. Copiers: Used for alert sounds or status indications. Phones: Incorporate audible alerts or notifications. Wide Range of Electronic Projects: Suitable for diverse applications where sound alerts are needed. Compatible with Arduino and Other Microcontrollers: Easily integrated into projects using popular development boards. Educational: Useful for teaching and learning about sound and electronics in educational settings.