Abstract: An apparatus includes a housing and at least one heat-generating electrical module. The housing includes a floor and at least one sidewall portion extending around the floor's perimeter. The sidewall portion(s) includes an air intake section located at a first end of the floor and a first air exhaust section located at a second end of the floor. The floor includes two noncoplanar floor portions and a transition portion interconnecting them. The transition portion, which may be angled, includes a second air exhaust section. The heat-generating module(s) are positioned over and spaced apart from the floor. At least one air flow channel is defined between inside surfaces of the floor and external surfaces of the heat-generating module(s). The apparatus may also include one or more fans that draw air in through the air intake section and force air through the air flow channel(s) and out the air exhaust sections.

Abstract: An apparatus includes a housing, at least one heat-generating electrical module, and at least one fan. The housing includes a floor and at least one sidewall extending around the floor's perimeter. A first sidewall end section defines an air intake port and a second sidewall end section defines a first air exhaust port. The floor includes two noncoplanar floor portions and a transition portion interconnecting them. The transition portion defines a second air exhaust port. The heat-generating module(s) are positioned over the floor portions. Inside surfaces of the floor portions together with external surfaces of the heat-generating module(s) define at least one air flow channel therebetween. The fan or fans are positioned proximate the air intake port and operable to draw air into the housing through the intake port. The fan or fans force the indrawn air through the air flow channel(s) and out the air exhaust ports.

Abstract: A vertically oriented, electrically conductive enclosure includes at least three shield members. A first member has a first floor and a first sidewall that extends away from the first floor around a periphery of the first shield floor. A second member is electrically coupled to the first member and has a second floor and a second sidewall. A first portion of the second sidewall extends away from the second floor in a first direction. A second portion of the second sidewall extends away from the second floor in a second direction opposite to the first direction and engages the first sidewall. A third member is electrically coupled to the second member and has a shield cover and a third sidewall. The third sidewall extends away from the shield cover about a periphery of the shield cover and engages the first portion of the second sidewall.

Abstract: An apparatus includes a housing, at least one heat-generating electrical module, and at least one fan. The housing includes a floor and at least one sidewall extending around the floor's perimeter. A first sidewall end section defines an air intake port and a second sidewall end section defines a first air exhaust port. The floor includes two noncoplanar floor portions and a transition portion interconnecting them. The transition portion defines a second air exhaust port. The heat-generating module(s) are positioned over the floor portions. Inside surfaces of the floor portions together with external surfaces of the heat-generating module(s) define at least one air flow channel therebetween. The fan or fans are positioned proximate the air intake port and operable to draw air into the housing through the intake port. The fan or fans force the indrawn air through the air flow channel(s) and out the air exhaust ports.

Abstract: A digital addressable lighting interface (DALI) controlled device is arranged to communicate information according to a DALI protocol and powered by electrically coupling the controlled device to a DALI bus. The DALI bus is monitored for initiation of a DALI communication sequence. During a period of non-communication on the DALI bus, a high-current power supply is electrically coupled to the controlled device via the DALI bus. The high-current power supply provides a first high-current power signal to the controlled device. Upon detection of any DALI communication sequence on the DALI bus, the high-current power supply is electrically de-coupled from the controlled device for a determined time period. During the determined time period, a storage element is electrically coupled to the controlled device. The storage element provides a second high-current power signal to the controlled device.

Abstract: A digital addressable lighting interface (DALI) controlled device is arranged to communicate information according to a DALI protocol and powered by electrically coupling the controlled device to a DALI bus. The DALI bus is monitored for initiation of a DALI communication sequence. During a period of non-communication on the DALI bus, a high-current power supply is electrically coupled to the controlled device via the DALI bus. The high-current power supply provides a first high-current power signal to the controlled device. Upon detection of any DALI communication sequence on the DALI bus, the high-current power supply is electrically de-coupled from the controlled device for a determined time period. During the determined time period, a storage element is electrically coupled to the controlled device. The storage element provides a second high-current power signal to the controlled device.

Abstract: A digital addressable lighting interface (DALI) controlled device is arranged to communicate information according to a DALI protocol and powered by electrically coupling the controlled device to a DALI bus. The DALI bus is monitored for initiation of a DALI communication sequence. During a period of non-communication on the DALI bus, a high-current power supply is electrically coupled to the controlled device via the DALI bus. The high-current power supply provides a first high-current power signal to the controlled device. Upon detection of any DALI communication sequence on the DALI bus, the high-current power supply is electrically de-coupled from the controlled device for a determined time period. During the determined time period, a storage element is electrically coupled to the controlled device. The storage element provides a second high-current power signal to the controlled device.

Abstract: A digital addressable lighting interface (DALI) controlled device is arranged to communicate information according to a DALI protocol and powered by electrically coupling the controlled device to a DALI bus. The DALI bus is monitored for initiation of a DALI communication sequence. During a period of non-communication on the DALI bus, a high-current power supply is electrically coupled to the controlled device via the DALI bus. The high-current power supply provides a first high-current power signal to the controlled device. Upon detection of any DALI communication sequence on the DALI bus, the high-current power supply is electrically de-coupled from the controlled device for a determined time period. During the determined time period, a storage element is electrically coupled to the controlled device. The storage element provides a second high-current power signal to the controlled device.

Abstract: Systems and techniques for cancelling fan noise by providing an anti-noise waveform are disclosed. In some embodiments, the systems and techniques include receiving, at a fan, a pulse width modulated signal from a power supply. A fan blade of the fan is rotated at a spin speed that is measured by a first sensor. A second sensor detects a position of the fan blade. Based on the spin speed and the position, an anti-noise waveform is generated that is configured to cause destructive interference with a fan noise of the fan. An audio signal is output that corresponds to the anti-noise waveform to cause destructive interference with noise caused by the spinning blades of the fan.

Abstract: Systems and techniques for cancelling fan noise by providing an anti-noise waveform are disclosed. In some embodiments, the systems and techniques include receiving, at a fan, a pulse width modulated signal from a power supply. A fan blade of the fan is rotated at a spin speed that is measured by a first sensor. A second sensor detects a position of the fan blade. Based on the spin speed and the position, an anti-noise waveform is generated that is configured to cause destructive interference with a fan noise of the fan. An audio signal is output that corresponds to the anti-noise waveform to cause destructive interference with noise caused by the spinning blades of the fan.