Below is a complete GPS GSM Car Tracker
HEX not for free
Having a below specifications:
1). Get GPS coordinates by sending a SMS.
2). Get alert if door or bonnet open.
3). Lock your car any time by sending SMS.
4). Get Call & SMS while some one open the door or bonnet
Here in this project were need up to 5 VDC for GSM ,GPS , controller & relays .
Following parts were used:
1). 3V to 5V DC Step up
2). 3.7 , 2Amps mobile battery
3). Car charger 2Amps
4). On/off button
5). 1000uf ,16v capacitor
6). Small size Rectifier bridge
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https://www.youtube.com/watch?v=QGYTBDkDp_o&t=13s
