Fire Fighting Robot
A robot that locates a flame with directional sensors, drives towards it and extinguishes it with a water jet.
- Suitable for
- Higher Secondary
- Technology
- Arduino Uno
Intermediate6–8 days
Electronics · Safety & Alarm
Gas Leakage Detector
LPG and smoke detection with a staged alarm, an exhaust fan trigger and an optional SMS or app alert.
- Difficulty
- Beginner
- Typical time
- 4–6 days
- Suitable for
- Higher Secondary
Price
Contact for price
Cost depends on components, complexity and which deliverables you need, so we quote after understanding your requirement.
Technologies
- MQ-2 / MQ-6 gas sensing
- Arduino Uno
- Staged threshold alarm
- ESP32 alerting (variant)
Project overview
An MQ-series gas sensor monitors the air continuously. A first threshold raises a warning indication, and a second, higher threshold sounds the alarm and starts an exhaust fan. Two stages rather than one is what makes the project useful: a brief cooking spike should not trigger a full alarm.
Sensor warm-up is the detail students most often miss. MQ sensors need a preheat period before their readings mean anything, and a detector that alarms the moment it is switched on is reading its own warm-up, not gas. The build handles this with a startup delay and a status indication, which is a good thing to be able to explain.
A connected variant on ESP32 adds a push notification so the alert reaches a phone when nobody is in the room. Both versions keep the local buzzer and fan output, because an alert that depends on the network is not a safety device.
Features
- Two-stage detection — warning level and alarm level
- Automatic exhaust fan activation at the alarm threshold
- Live gas concentration reading on the LCD
- Sensor warm-up handling with a clear status indication
- Optional phone alert on the ESP32 variant
How it works
- 1On power-up the sensor is given its preheat period and the status indicator shows that it is not yet ready.
- 2Once warm, the analogue output is sampled and averaged to reject brief spikes.
- 3Crossing the first threshold lights the warning indicator.
- 4Crossing the alarm threshold sounds the buzzer and starts the exhaust fan.
- 5The outputs clear once the reading falls back below the thresholds with hysteresis applied.
Components used
- MQ-2 or MQ-6 gas sensor module
- Arduino Uno (or ESP32 for the connected variant)
- Buzzer and indicator LEDs
- Exhaust fan with driver stage
- 16x2 LCD
- Enclosure and regulated supply
Questions about this project
How do you test it safely?
With a gas lighter held briefly near the sensor and released, in a ventilated space — never with an open cylinder valve. The safe test procedure is covered at handover.
Is it accurate enough to be a real safety device?
It is an academic project, not a certified detector. It reliably demonstrates the principle and the threshold behaviour, and you should present it that way — examiners respect the distinction.
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Need the Gas Leakage Detector in Surat?
Send your class or course and your submission date and we'll confirm what's achievable, what it includes and what it costs — before you commit.