Abstract: A load control is provided which includes a wall-box housing, an electrical device to control electrical power to a load, a controller to control the electrical device, and a control interface. The controller is user-programmable and includes a saved settings data structure having multiple columns and rows of control settings. The control interface has first and second button switches to respectively select a column and row of the settings data structure in a settings mode of the controller. The button switches include respective electro-mechanical devices and are selectable by a user without disassembly of the load control. The control interface also includes one or more light indicators to signal the selected column of the settings data structure in the settings mode of the control, and to differently signal the selected row of the settings data structure.

Abstract: Operating an electrical load controller includes determining a firing angle at which to fire a switching circuit of the electrical load controller and selecting a control signal pulse duration between a fixed duration and a variable duration based on the firing angle and on whether voltage sag is present in an alternating current (AC) waveform, then controlling a supply of AC power to a load based on the selected duration. An electrical load controller and method of operating such is also provided, in which a detection window is selected for detecting zero-crossings (ZC) of an AC waveform, a ZC signal is monitored and a time of a next ZC is ascertained, and a supply of AC power to a load is controlled using the ascertained time.

Abstract: Operating an electrical load controller includes determining a firing angle at which to fire a switching circuit of the electrical load controller, the firing angle corresponding to a firing delay time. In some aspects, the operating includes selecting a control signal pulse duration between a fixed duration and a variable duration, and controlling the supply of AC power to the load based on the selected control signal pulse duration. In some aspects, the operating includes detecting whether a voltage sag is present in the AC waveform and the selecting is based on determining that voltage sag is present in the AC waveform.

Abstract: A load control is provided which includes a wall-box housing, an electrical device to control electrical power to a load, a controller to control the electrical device, and a control interface. The controller is user-programmable and includes a saved settings data structure having multiple columns and rows of control settings. The control interface has first and second button switches to respectively select a column and row of the settings data structure in a settings mode of the controller. The button switches include respective electro-mechanical devices and are selectable by a user without disassembly of the load control. The control interface also includes one or more light indicators to signal the selected column of the settings data structure in the settings mode of the control, and to differently signal the selected row of the settings data structure.

Abstract: Operation of an electrical load controller includes predetermining a duration of time based at least in part on a frequency of an alternating current (AC) waveform, the AC waveform oscillating though full cycles, selecting a detection window of time equal in duration to the predetermined duration of time, the selected detection window extending from a selected first time to a selected second time and straddling an expected time of a next zero-crossing of the AC waveform, monitoring a zero-crossing signal for a zero-crossing indication, of the next zero-crossing, occurring within the selected detection window, ascertaining a time of the next zero-crossing based on the monitoring, and selectively controlling a supply of AC power to a load, wherein the controlling uses the ascertained time of the next zero-crossing of the AC waveform to fire a switching circuit of the electrical load controller.

Abstract: Operating an electrical load controller includes determining a firing angle at which to fire a switching circuit of the electrical load controller, the firing angle corresponding to a firing delay time. In some aspects, the operating includes selecting a control signal pulse duration between a fixed duration and a variable duration, and controlling the supply of AC power to the load based on the selected control signal pulse duration. In some aspects, the operating includes detecting whether a voltage sag is present in the AC waveform and the selecting is based on determining that voltage sag is present in the AC waveform.

Abstract: A load control is provided which includes a wall-box mounted housing, an electrical device to control electrical power to a load, and a control assembly to control the electrical device. The control assembly includes a user-programmable control, with a saved settings data structure having multiple columns and rows of control settings, and a control interface with first and second button switches to selectively advance through the columns and rows of the settings data structure in a settings mode of the control. The button switches are selectable by a user without disassembly of the load control, and the control interface also includes one or more indicator devices to signal a column of the settings data structure to which the control has been advanced in the settings mode of the control, and to signal a row of the settings data structure to which the control has been advanced.

Abstract: A load control is provided which includes a wall-box mounted housing, an electrical device to control electrical power to a load, and a control assembly to control the electrical device. The control assembly includes a user-programmable control, with a saved settings data structure having multiple columns and rows of control settings, and a control interface with first and second button switches to selectively advance through the columns and rows of the settings data structure in a settings mode of the control. The button switches are selectable by a user without disassembly of the load control, and the control interface also includes one or more indicator devices to signal a column of the settings data structure to which the control has been advanced in the settings mode of the control, and to signal a row of the settings data structure to which the control has been advanced.

Abstract: Operating an electrical load controller includes, in one aspect, predetermining a duration of time based at least in part on a frequency of an alternating current (AC) waveform, the alternating current (AC) waveform oscillating though full cycles, each full cycle comprising a positive half cycle and a negative half cycle; selecting a detection window of time equal in duration to the predetermined duration of time, the selected detection window extending from a selected first time to a selected second time and straddling an expected time of a next zero-crossing of the AC waveform; monitoring a zero-crossing signal for a zero-crossing indication, of the next zero-crossing, occurring within the selected detection window; ascertaining a time of the next zero-crossing based on the monitoring; and selectively controlling a supply of AC power to a load, wherein the controlling uses the ascertained time of the next zero-crossing of the AC waveform to fire a switching circuit of the electrical load controller.