Abstract: This disclosure relates to systems, methods and apparatuses for removing precipitation from an exterior of a building in an expedited and automated fashion. The precipitation removal system includes one or more sweeper assemblies and one or more hoisting assemblies. The sweeper assemblies are suspended from the roof, ledge or other portion of a building. The hoisting assemblies assist the sweeper assemblies with vertically traversing the exterior of the building. As a sweeper assembly vertically traverses the side of the building, precipitation that accumulates on the exterior of the building is removed. The sweeper assemblies can remove precipitation from connecting structures on the exterior of the building which are used by building maintenance personnel to perform maintenance operations on the exterior of the building.

Abstract: This disclosure relates to systems, methods and apparatuses for removing precipitation from an exterior of a building in an expedited and automated fashion. The precipitation removal system includes one or more sweeper assemblies and one or more hoisting assemblies. The sweeper assemblies are suspended from the roof, ledge or other portion of a building. The hoisting assemblies assist the sweeper assemblies with vertically traversing the exterior of the building. As a sweeper assembly vertically traverses the side of the building, precipitation that accumulates on the exterior of the building is removed. The sweeper assemblies can remove precipitation from connecting structures on the exterior of the building which are used by building maintenance personnel to perform maintenance operations on the exterior of the building.

Abstract: The disclosure provides a button-press detection and filtering method, related circuit, and button-press detection chip for a external device. A button-press signal from a wire control apparatus is coupled to the button-press detection chip for the external device. The button-press detection chip for the external device can digitally sample the button-press signal through the filter circuit and outputs a digital logic signal corresponding to a button to an audio codec according to the sampling result. The audio codec can determine a pressed button according to the digital logic signal and performs a corresponding function. With the solutions of the disclosure, a noise interference signal in a button-press signal may be avoided and a pressed button may be accurately detected, without using a dedicated chip or complex software codes in a wire control apparatus and an electronic device.

Abstract: An apparatus comprises a first connector, a second connector, a detection circuit and a logic circuit. The first connector and the second connector are configured for electrical communication with first and second conducting terminals, respectively, of an audio jack plug. The detection circuit is configured to apply a first value of current to the first connector, and apply a second value of current to the second connector. The logic circuit is configured to generate an indication that the audio jack plug is fully inserted according to a logic level detected at the second connector when electrical ground is detected at the first connector.

Abstract: An apparatus comprises a first connector, a second connector, a detection circuit and a logic circuit. The first connector and the second connector are configured for electrical communication with first and second conducting terminals, respectively, of an audio jack plug. The detection circuit is configured to apply a first value of current to the first connector, and apply a second value of current to the second connector. The logic circuit is configured to generate an indication that the audio jack plug is fully inserted according to a logic level detected at the second connector when electrical ground is detected at the first connector.

Abstract: The disclosure provides a button-press detection and filtering method, related circuit, and button-press detection chip for a external device. A button-press signal from a wire control apparatus is coupled to the button-press detection chip for the external device. The button-press detection chip for the external device can digitally sample the button-press signal through the filter circuit and outputs a digital logic signal corresponding to a button to an audio codec according to the sampling result. The audio codec can determine a pressed button according to the digital logic signal and performs a corresponding function. With the solutions of the disclosure, a noise interference signal in a button-press signal may be avoided and a pressed button may be accurately detected, without using a dedicated chip or complex software codes in a wire control apparatus and an electronic device.