Introduction: Smart Helmet! Unassembled

This Helmet is designed to Detect the Alcohol Level of two wheeler riders and detect accidents also bringing in help. By using this helmet it reduces the accidents due to drunk and driving.

Step 1: The Required Materials

1. Arduino UNO or Nano or Liliypad

2. Alcohol Sensor - MQ3

3. Vibration sensor

4. Ultrasonic Sensor HC SR04

5. Bi- Colour LED

6. Mini A8 Tracker

7. GSM Module with sim900a

8. Connecting Wires

And obviously a Helmet.

Step 2: Connections

The setup uses 2 Arduino boards. I have used two Arduino uno but one of them can be replaced with Arduino Nano or Lilypad (Both Discontinued) since they require less space and can be placed within the helmet. With the above diagrams the circuit connection is done.

Step 3: Part 1 Alcohol and Ultrasonic Sensor

Alcohol Sensor MQ 3

The MQ 3 is placed in the Helmet to determine the alcohol level of the driver and it is indicated with an bi color led. The red light indicates higher alcohol level and the yellow led indicates moderate alcohol level or below permissible level.

Ultrasonic Sensor HC SR 04

The HC SR 04 detects the close proximity vehicles, we have placed it behind the helmet so the the fast approaching vehicle is intimated to us through a buzzer or led or vibration motor. Just like a 'Spidey Sense'

Both these sensors can be connected with the one arduino. The codes are given for this operation

Step 4: Part 2 Accident Detection

In case the rider meets with an accident the vibration sensor detects the vibration and triggers the GSM Shield mounted over the Arduino Uno to send an SMS to pre defined numbers to call for Help. The variable capacitor in the vibration sensor can be changed for measuring the impact.

Code is given

Step 5: Part 3 Location

In order to find the location of the accident a MINI A8 gps/gsm tracker is placed with the helmet with sends the location once requested from the registered mobile number.

Send SMS "DW" to the number within the GPS Tracker and you will receive a SMS of the location. i have attached a screenshot of the SMS above.

A GPS module can also be used instead of this tracker device.

Step 6: Conclusion

This is the final picture of the sensors implemented within the helmet. It looks bit awkward but can be neatly embedded by drilling the ultrasonic within the helmet and using smaller arduinos

Due to cost constraint we chose Arduino UNO.

The power supply can be used from a 2000mah power bank. Which ca also be replaced with solar panels.

The working of the GSM Module can be seen in the Serial Monitor which should appear like in the pic.

Thank You! Good Luck!!

Any Doubts mail me at

Sensors Contest 2016

Participated in the
Sensors Contest 2016

Automation Contest 2016

Participated in the
Automation Contest 2016