A portable lighting device, such as a flashlight, with a mechanical power switch and multiple operating modes is provided. The mechanical power switch is disposed in series with the controller for the lighting device and acts as the user interface to the controller to change modes of operation. Because the mechanical power switch is in series with the controller, the portable lighting device does not consume battery power when the mechanical switch is open. A state machine coupled to the controller is polled by the controller each time it is powered up to determine the operational mode of the lighting device.

A portable lighting device, such as a flashlight, with a mechanical power switch and multiple operating modes is provided. The mechanical power switch is disposed in series with the controller for the lighting device and acts as the user interface to the controller to change modes of operation. Because the mechanical power switch is in series with the controller, the portable lighting device does not consume battery power when the mechanical switch is open. A state machine coupled to the controller is polled by the controller each time it is powered up to determine the operational mode of the lighting device.

A multiple location load control system may comprise a main load control device and an accessory load control device. The main load control device may control an amount of power delivered to an electrical load from an AC power source using a control circuit and a controllably conductive device. The accessory load control device may be coupled to the main load control device via an accessory terminal. The accessory load control device may detect a user input for changing a characteristic of the electrical load and may send a signal to the main load control device indicating the user input. The main load control device may detect a pattern of the signal based on a threshold and further determine the user input in response to the detected pattern. The main load control device may adjust the threshold based on line/load conditions of the multiple location load control system.

A multiple location load control system may comprise a main load control device and an accessory load control device. The main load control device may control an amount of power delivered to an electrical load from an AC power source using a control circuit and a controllably conductive device. The accessory load control device may be coupled to the main load control device via an accessory terminal. The accessory load control device may detect a user input for changing a characteristic of the electrical load and may send a signal to the main load control device indicating the user input. The main load control device may detect a pattern of the signal based on a threshold and further determine the user input in response to the detected pattern. The main load control device may adjust the threshold based on line/load conditions of the multiple location load control system.

A system may be provided that includes an adaptor connected to a dimmer and virtual three-way switch. The virtual three-way switch can be for a lamp plugged into wall-switched receptacle. The virtual three-way switch can control a lamp, appliance, or any device that is connected to the three-way switch by one or more of the connected switches, independent of the position of the unused switch. The virtual three-way switch may include a power input that receives power from a first power source, a sensor detecting a state change of a second power source, a user input sensor receiving a user command, and a power output delivering received power at a rate as function of the state change and of the user command. The virtual three-way switch can be connected to a user input device that is waiting to receive a command. The power output can deliver power to a connected device.

A system may be provided that includes an adaptor connected to a dimmer and virtual three-way switch. The virtual three-way switch can be for a lamp plugged into wall-switched receptacle. The virtual three-way switch can control a lamp, appliance, or any device that is connected to the three-way switch by one or more of the connected switches, independent of the position of the unused switch. The virtual three-way switch may include a power input that receives power from a first power source, a sensor detecting a state change of a second power source, a user input sensor receiving a user command, and a power output delivering received power at a rate as function of the state change and of the user command. The virtual three-way switch can be connected to a user input device that is waiting to receive a command. The power output can deliver power to a connected device.

A dimming track lamp has a detachable assembly housing with a power supply track, a control circuit board electrically connected with the power supply track, a lamp body arranged on the assembly housing, a printed circuit board arranged in the lamp body, a light source on the printed circuit board and an optical element arranged in the light output direction of the light source. The control circuit board has a power supply module which is electrically connected with the power supply track, a signal input module, a signal processing module for analyzing and calculating the input signal and generating a control signal, and a signal output module for outputting the control signal to the printed circuit board. The light source has a warm light source and a cold light source, the control signal is used to control the light output of the warm light source and the cold light source.

A dimming track lamp has a detachable assembly housing with a power supply track, a control circuit board electrically connected with the power supply track, a lamp body arranged on the assembly housing, a printed circuit board arranged in the lamp body, a light source on the printed circuit board and an optical element arranged in the light output direction of the light source. The control circuit board has a power supply module which is electrically connected with the power supply track, a signal input module, a signal processing module for analyzing and calculating the input signal and generating a control signal, and a signal output module for outputting the control signal to the printed circuit board. The light source has a warm light source and a cold light source, the control signal is used to control the light output of the warm light source and the cold light source.

Method for multi-zone temperature control system having temperature control matrix and gate driver; N*M temperature control modules form N-row M-column matrix, power supply line, and power return line; each temperature control module comprising: a temperature control unit adapts to be heated up by electrical power for temperature controlling; semiconductor switch provided with a gate electrode connected with the gate driver, two ends of the gate being connected with the power supply line, and the power return line through the temperature control unit, respectively. In the temperature control matrix, one ends, which are connected with a power return line, of the temperature control units of temperature control modules in a same row or same column are serially connected, and connected with the power supply line; one ends, which are connected with the power supply line at same row or same column are serially connected, and connected with the power supply line.

A multiple location load control system may comprise a main load control device and an accessory load control device. The main load control device may control an amount of power delivered to an electrical load from an AC power source using a control circuit and a controllably conductive device. The accessory load control device may be coupled to the main load control device via an accessory terminal. The accessory load control device may detect a user input for changing a characteristic of the electrical load and may send a signal to the main load control device indicating the user input. The main load control device may detect a pattern of the signal based on a threshold and further determine the user input in response to the detected pattern. The main load control device may adjust the threshold based on line/load conditions of the multiple location load control system.