---
product_id: 130799073
title: "MELODY''S HOBBY CENTRE FIRE Alarm Physics Science Working Project with LED Running Light."
brand: "centre"
price: "R$141"
currency: BRL
in_stock: true
reviews_count: 8
category: "Melody"S Hobby Centre"
url: https://www.desertcart.com.br/products/130799073-melodys-hobby-centre-fire-alarm-physics-science-working-project-led
store_origin: BR
region: Brazil
---

# LED + buzzer for instant audio-visual alerts 9V battery-powered for portable learning No assembly needed, plug & play STEM kit MELODY''S HOBBY CENTRE FIRE Alarm Physics Science Working Project with LED Running Light.

**Brand:** centre
**Price:** R$141
**Availability:** ✅ In Stock

## Summary

> 🔥 Light up your STEM journey with real fire alarm tech! 💡

## Quick Answers

- **What is this?** MELODY''S HOBBY CENTRE FIRE Alarm Physics Science Working Project with LED Running Light. by centre
- **How much does it cost?** R$141 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.com.br](https://www.desertcart.com.br/products/130799073-melodys-hobby-centre-fire-alarm-physics-science-working-project-led)

## Best For

- centre enthusiasts

## Why This Product

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

## Key Features

- • **Screen-Free Fun:** Engaging DIY science project that sparks curiosity offline
- • **STEM Skill Booster:** Enhances critical thinking, problem-solving & creativity
- • **Kid & Parent Approved:** Smooth assembly, easy instructions, perfect for school projects
- • **Instant Audio-Visual Feedback:** LED and buzzer activate simultaneously for clear fire alert
- • **Real-World Circuit Experience:** Hands-on transistor switch & thermistor sensor demo

## Overview

MELODY'S HOBBY CENTRE Fire Alarm Science Project is a ready-to-use educational kit powered by a 9V battery that demonstrates transistor switching and thermistor sensing through synchronized LED and buzzer alerts. Designed for kids aged 0-11, it promotes STEM learning, critical thinking, and creativity with easy assembly and step-by-step instructions, making it an ideal hands-on tool for school projects and early analytical skill development.

## Description

Fire alarm is device that gives indication of alarming sound with Light when fire took place near that device.In the circuit, an audio BUZZER is working as fire alarm. Transistor T1 working as SWITCH under Common Emitter configuration, whose output from collector is fed to the LED and Buzzer to give audio visual indication. When thermistor is being heated by match stick, the internal resistance drops to a certain extent. This makes transistor to conduct and that allows the current to flow from positive to negative through LED and buzzer in parallel. COMPONENTS USED T-1SILICON TRANSISTOR (NPN) R-1220 ohm ResistanceR-2 1 Kilo Ohm Resistance R-3 330 Ohms Resistance Buzzer Piezo Type Battery 9 V DC Thermistor 100 Kilo Ohms LEDLight Emitting Diode 2.4 V

Review: It is good working and best - The product is very amazing and perfect working without any damage perfect for school project
Review: Life saving - Thank you very much for such an amazing product since it helped me a lot to earn marks in my last year's boards practical.

## Features

- Fire alarm science project Transistor T1 working as SWITCH under Common Emitter configuration, whose output from collector is fed to the LED and Buzzer to give audio visual indication When thermistor is being heated by match stick, the internal resistance drops to a certain extent. This makes transistor to conduct and that allows the current to flow from positive to negative through LED and buzzer in parallel
- 9v battery Operated
- Includes step-by-step DIY instructional manual and certificate
- An engaging activity for your child to learn and explore the world of science
- Have Fun with hobby kit teaching aids Toys are Fun to Play with also Helps in Development of Early Age Analytical & Problem Solving Skills in Child and Helps Improving Creativity & Curiosity
- Easy to understand instruction guide, Smooth assembly, No additional tools required, Approved by Kids, Parents, teachers and Principal and appreciated by all. Off Screen game. Concept Learning
- Promotes Creativity and Problem-Solving Skills: Challenges kids to build and operate their own forklift, encouraging creativity, critical thinking, and problem-solving abilities
- Ideal for both boys and girls
- Fully Assembled & Tested.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B07SCL2D95 |
| Assembly Required | No |
| Batteries Required | No |
| Best Sellers Rank | #62,943 in Toys & Games ( See Top 100 in Toys & Games ) #1,793 in Science Toys & Kits |
| Country of Origin | India |
| Customer Reviews | 3.6 3.6 out of 5 stars (51) |
| Date First Available | 24 May 2019 |
| Educational Objective(s) | Concept Development Skills, Critical Thinking, Imagination Development, Logical Thinking, Memory Skill, Observation Skills, Problem Solving Skills, STEM |
| Generic Name | MELODY''s HOBBY CENTRE Fire Alarm Physics Science Project - Multicolor,for-teen,adult |
| Importer | Melodys Hobby Centre. 7F/7A, DDA Building, District Centre, Janak Puri,- 10058 |
| Item Dimensions LxWxH | 78.7 x 55.9 x 2.5 Centimeters |
| Item Weight | 190 g |
| Item part number | DDA-89 |
| Manufacturer | MELODY"S HOBBY CENTRE, Melodys Hobby Centre. 7F/7A, DDA Building, District Centre, Janak Puri,- 10058 |
| Manufacturer recommended age | 0 - 11 years |
| Material Type(s) | Plastic, Wood |
| Net Quantity | 1.0 Count |
| Number of Game Players | 2 |
| Number of Puzzle Pieces | 1 |
| Packer | Melodys Hobby Centre. 7F/7A, DDA Building, District Centre, Janak Puri,- 10058 |
| Product Dimensions | 78.74 x 55.88 x 2.54 cm; 190 g |
| tech_spec_battery_description_toys | Alkaline |

## Product Details

- **Brand:** MELODY"S HOBBY CENTRE
- **Item Weight:** 190 Grams
- **Item dimensions L x W x H:** 78.7 x 55.9 x 2.5 Centimeters
- **Size:** A4

## Images

![MELODY''S HOBBY CENTRE FIRE Alarm Physics Science Working Project with LED Running Light. - Image 1](https://m.media-amazon.com/images/I/41ORLOAu7JL.jpg)
![MELODY''S HOBBY CENTRE FIRE Alarm Physics Science Working Project with LED Running Light. - Image 2](https://m.media-amazon.com/images/I/41Q6PB7psLL.jpg)
![MELODY''S HOBBY CENTRE FIRE Alarm Physics Science Working Project with LED Running Light. - Image 3](https://m.media-amazon.com/images/I/41hcfxUPtJL.jpg)
![MELODY''S HOBBY CENTRE FIRE Alarm Physics Science Working Project with LED Running Light. - Image 4](https://m.media-amazon.com/images/I/519RpmwLyAL.jpg)
![MELODY''S HOBBY CENTRE FIRE Alarm Physics Science Working Project with LED Running Light. - Image 5](https://m.media-amazon.com/images/I/51CpwhCJJDL.jpg)

## Questions & Answers

**Q: It need to be assembled or it is readymade**
A: Readymade

**Q: Is project ready tovwork or we need to do it**
A: Ready

**Q: Is the Report available with project ?**
A: Yes

**Q: Does it work?**
A: Yes

## Customer Reviews

### ⭐⭐⭐⭐⭐ It is good working and best
*by P***P on 25 May 2025*

The product is very amazing and perfect working without any damage perfect for school project

### ⭐⭐⭐⭐⭐ Life saving
*by N***A on 8 February 2021*

Thank you very much for such an amazing product since it helped me a lot to earn marks in my last year's boards practical.

### ⭐ Replacement also damaged. No refund provided
*by N***L on 29 November 2025*

Damaged product received. Replacement was also damaged and return refund not issued even after return approval

## Frequently Bought Together

- MELODY''S HOBBY CENTRE FIRE Alarm Physics Science Working Project with LED Running Light.
- StepsToDo (with device) Hydroelectric Power Generation DIY Kit
- StepsToDo Wind Turbine Science Kit. Windmill Making Kit for Students. Electricity from Flowing Air. Science Teaching and Learning Aid

---

## Why Shop on Desertcart?

- 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016
- 🌍 **Shop Globally** — Access 737+ million products across 21 categories
- 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price
- 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members)
- 🔒 **Secure Payments** — Trusted payment options with buyer protection
- ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews

**Shop now:** [https://www.desertcart.com.br/products/130799073-melodys-hobby-centre-fire-alarm-physics-science-working-project-led](https://www.desertcart.com.br/products/130799073-melodys-hobby-centre-fire-alarm-physics-science-working-project-led)

---

*Product available on Desertcart Brazil*
*Store origin: BR*
*Last updated: 2026-02-21*