I have designed a circuit.The proposed circuit, will be used for a tracking device. The device can be connected to smartphone via Bluetooth protocol. This circuit contain following sections:
1. controller: This Section contains NRF51422 microcontroller, Antenna, motor driver, LED controller.
2. Power Section: This circuit provide energy for the system. This circuit also charges a battery by solar cell. The system has 2 source of energy, rechargeable battery and a backup battery. Also rechargeable battery has an output to a USB charger.
3. GSM/GPS: this circuit can locate the device and send its data through SMS to the user, also user can communicate with device in long distances via SMS.
-Circuit Size. Since the device is really compact, size of the circuit is an important factor.
-Energy Efficiency: Solar cell is the only source of energy, therefore developing a low powered system is the must.
I will provide schematic design of the...