Quantity   Component name
1 × SIM900 GSM module
1 × BQ24266 Single-cell Li-Ion battery charger & system power supply
1 × MC34063 Switching power regulator
1 × PIC24F32KA304 Microprocessors, Microcontrollers, DSPs / Microcontrollers (MCUs)
1 × L6201P High-voltage H-bridge