Systems and Method for Using Capacitors in Security Devices

摘要

A battery-free security system is provided with one or more series or parallel capacitive networks. One or more solar panels are used to charge the capacitive networks and one or more charging circuits are used to control the charging of the capacitive networks. One or more DC-DC converters maybe used to provide a voltage to a load, the timer/clock circuitry, and a user interface. In those instances when it is desired that the timer/clock circuitry remain powered at all times, the timer/clock circuitry is preferentially preserved at the expense of the load such that if, for any reason, the capacitive network is drained after running the load, there will still be sufficient power stored in the capacitive network to maintain the timer/clock circuitry.

主权项

1. A method of operating a security camera comprising:
providing one or more solar panels; storing energy from the one or more solar panels in one or more capacitors; providing control circuitry operatively coupled to the security camera and to the one or more capacitors; using the energy stored in the one or more capacitors to provide power to the security camera; and configuring the control circuitry to prevent the security camera from depleting energy stored in the one or more capacitors below a critical level so that the control circuitry will have enough energy available to sustain full circuit operation, including critical logic operation and timekeeping operation, during time periods when the energy stored in the one or more capacitors is insufficient to maintain operation of both the control circuitry and the security camera during a period of time in which there may be limited amounts of solar energy for charging the capacitors back to a fully operational level.