Worker & Bike Rider Safety Helmet with Accident Alert and GPS Tracking

Smart Helmet with Impact Sensor, GPS & GSM Alert Worker & Bike Rider Safety Helmet that detects head impacts using a 4-pin momentary tactile switch and immediately sends an SMS with live GPS location. The system uses an Arduino Nano R3 to process the trigger, GY-NEO6MV2 (NEO-6M) for positioning and SIM800L for GSM alerts. Battery-powered with onboard power regulation for stable 5V to the Arduino and 3.7V for the GSM module. Specifications Trigger sensor: 4-Pin Momentary Tactile Push Button Switch, 12x12mm Microcontroller: Arduino Nano R3 (ATmega328) GPS module: GY-NEO6MV2 (NEO-6M) with antenna GSM/GPRS module: SIM800L with antenna (sends SMS with live location) Power source: 2 × 18650 Li-Ion cells (3.7V nominal) in 2-cell holder Power regulation: LM2596 Buck Converter(s) for 5V (Arduino) and 3.7V rail for SIM800L as configured Charger: Dual-slot 18650 lithium battery charger (external accessory) Power control: 2-Pin Rocker Switch Wiring: Slim flexible project wire cable for internal connections Alert method: Immediate SMS with GPS coordinates when impact is detected Assembly notes: Arduino reads push button state, debounces, then triggers GPS read + SIM800L SMS transmit