Abstract: A method and apparatus relates to systems powered by energy stored in capacitors. The capacitors may be charged using any desired power source. In one example, a camera system uses a combination of solar panels and a capacitive network to power the camera system with minimal required maintenance.

Abstract: A method and apparatus relates to systems powered by energy stored in capacitors. The capacitors may be charged using any desired power source. In one example, a camera system uses a combination of solar panels and a capacitive network to power the camera system with minimal required maintenance.

Abstract: 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 may be 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.

Abstract: A battery-free device 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 the device, a remote monitoring or controlling function, and, optionally, a user interface. In those instances when it is desired that the monitoring or controlling function remain powered at all times, the control circuitry is preferentially preserved at the expense of the other features of the device such that if, for any reason, the capacitive network is drained after running the other features, there will still be sufficient power stored in capacitive network to maintain the monitoring or controlling function.

Abstract: A battery-free wireless network 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 wireless router, switch or other network device, 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 network device such that if, for any reason, the capacitive network is drained after running the network device, there will still be sufficient power stored in the capacitive network to maintain the timer/clock circuitry.