Abstract: A yo-yo has at least one sensor configured to measure a parameter related to movement of the yo-yo, a transmitter configured to transmit the measured parameter to the computing device. A server is configured to determine a trick performed with the yo-yo based on the measured parameter, and to communicate the determination to one or more computing devices of different players.

Abstract: A self-protecting valve assembly for use in conjunction with a sump pump test and monitoring system having a test control module which generates a valve control signal for opening the valve to initiate a test cycle. The valve assembly includes an electrically-actuated valve which is responsive only to a valve-actuating signal and not to the valve control signal. A conversion circuit in the valve assembly converts the valve control signal to a valve actuating signal to actuate the valve. This protects the valve from receiving a false actuating signal in the event of a failure in the test control module.

Abstract: An electrical power system including a first power entry unit, at least one receptacle and a second power entry unit. The at least one receptacle is electrically connected to the first power entry unit. The second power entry unit is electrically connectable to the at least one receptacle. The first power entry unit and/or the second power entry unit include at least one detection device. Either the first power entry unit or the second power entry unit being a selected power entry unit and the remaining one being an other power entry unit. The detection device being configured to detect an attempted electrical power connection of both the selected power entry unit and the other power entry unit to the at least one receptacle.

Abstract: An electrical power system including a first power entry unit, at least one receptacle, and a second power entry unit. The at least one receptacle is electrically connected to the first power entry unit. The second power entry unit is electrically connectable to the at least one receptacle. The first power entry unit and the second power entry unit include at least one detection device. Either the first power entry unit or the second power entry unit is a selected power entry unit and the remaining one is another power entry unit. The detection device is configured to preclude an electrical power connection of both the selected power entry unit and the other power entry unit to the at least one receptacle.

Abstract: An electrical power system including a first power entry unit, at least one receptacle and a second power entry unit. The at least one receptacle is electrically connected to the first power entry unit. The second power entry unit is electrically connectable to the at least one receptacle. The first power entry unit and/or the second power entry unit include at least one detection device. Either the first power entry unit or the second power entry unit being a selected power entry unit and the remaining one being an other power entry unit. The detection device being configured to detect an attempted electrical power connection of both the selected power entry unit and the other power entry unit to the at least one receptacle.

Abstract: A self-protecting valve assembly for use in conjunction with a sump pump test and monitoring system having a test control module which generates a valve control signal for opening the valve to initiate a test cycle. The valve assembly includes an electrically-actuated valve which is responsive only to a valve-actuating signal and not to the valve control signal. A conversion circuit in the valve assembly converts the valve control signal to a valve actuating signal to actuate the valve. This protects the valve from receiving a false actuating signal in the event of a failure in the test control module.

Abstract: A circuit, a system and/or a method detect a passive electrical connection and/or an active electrical connection between an electrical device and a power supply. An integrity of the electrical connection between the electrical device and the power supply is monitored to determine if the electrical device may have access to power and/or to determine if the electrical device may be secure while on display. A high frequency AC signal is modulated onto a positive power rail between the electrical device and the power supply. Capacitance circuitry of the electrical device may remove the high frequency signal from the positive power rail. An absence of the high frequency signal on the positive power rail indicates that the electrical connection exists between the electrical device and the power supply. A presence of the high frequency signal on the positive power rail indicates that the electrical connection does not exist between the electrical device and the power supply.

Abstract: A multi-sensor alarm apparatus, may prevent and/or may deter a theft and/or a removal of one or more articles from a display stand. A base, a main body and a head unit are provided. The base and the main body are secured to the display stand. The multi-sensor alarm apparatus monitors an integrity of the attachment of the main body to the base with a separation sensor. Further, the multi-sensor alarm apparatus monitors sensors connected to the head unit and/or to the main body. The sensors may be removed and/or added as needed depending on the articles to be secured.

Abstract: An electrical power system including a first power entry unit, at least one receptacle, and a second power entry unit. The at least one receptacle is electrically connected to the first power entry unit. The second power entry unit is electrically connectable to the at least one receptacle. The first power entry unit and the second power entry unit include at least one detection device. Either the first power entry unit or the second power entry unit is a selected power entry unit and the remaining one is another power entry unit. The detection device is configured to preclude an electrical power connection of both the selected power entry unit and the other power entry unit to the at least one receptacle.

Abstract: An electrical power system including a first power entry unit, at least one receptacle, and a second power entry unit. The at least one receptacle is electrically connected to the first power entry unit. The second power entry unit is electrically connectable to the at least one receptacle. The first power entry unit and the second power entry unit include at least one detection device. Either the first power entry unit or the second power entry unit is a selected power entry unit and the remaining one is another power entry unit. The detection device is configured to preclude an electrical power connection of both the selected power entry unit and the other power entry unit to the at least one receptacle.

Abstract: An electrical power system including a first power entry unit, at least one receptacle, and a second power entry unit. The at least one receptacle is electrically connected to the first power entry unit. The second power entry unit is electrically connectable to the at least one receptacle. The first power entry unit and the second power entry unit include at least one detection device. Either the first power entry unit or the second power entry unit is a selected power entry unit and the remaining one is another power entry unit. The detection device is configured to preclude an electrical power connection of both the selected power entry unit and the other power entry unit to the at least one receptacle.

Abstract: A circuit, a system and/or a method detect a passive electrical connection and/or an active electrical connection between an electrical device and a power supply. An integrity of the electrical connection between the electrical device and the power supply is monitored to determine if the electrical device may have access to power and/or to determine if the electrical device may be secure while on display. A high frequency AC signal is modulated onto a positive power rail between the electrical device and the power supply. Capacitance circuitry of the electrical device may remove the high frequency signal from the positive power rail. An absence of the high frequency signal on the positive power rail indicates that the electrical connection exists between the electrical device and the power supply. A presence of the high frequency signal on the positive power rail indicates that the electrical connection does not exist between the electrical device and the power supply.

Abstract: A multi-sensor alarm apparatus, system and method may prevent and/or may deter a theft and/or a removal of one or more articles from a display stand. A base, a main body and a head unit are provided. The base and the main body are secured to the display stand. The multi-sensor alarm apparatus monitors an integrity of the attachment of the main body to the base with a separation sensor. Further, the multi-sensor alarm apparatus monitors sensors connected to the head unit and/or to the main body. The sensors may be removed and/or added as needed depending on the articles to be secured.