Abstract: Power to an electrical device is controlled using a phase control that changes a cutoff phase of an alternating current (AC) electrical signal delivered to the electrical device. The power delivered to the electrical device is increased to an operational level using the phase control. A level of the power delivered to the electrical device is maintained at the operational level using an integral half cycle control that selectively removes a plurality of half cycles from the AC electrical signal delivered to the electrical device such that a plurality of remaining half cycles in the AC electrical signal delivered to the electrical device have a frequency outside a range of sub-harmonic frequencies.

Abstract: In various examples, detecting unauthorized attachment to a communication bus between first and second components according to the present disclosure may include: applying voltage to the communication bus between the first and second components; detecting, at the first or second component, a temporal response to the applied voltage; comparing the detected temporal response to a reference temporal response associated with the communication bus; and based on the comparing, detecting the unauthorized attachment to the communication bus.

Abstract: Aspects are directed to systems in which control node communicates through a peripheral-side wired communications bus for data communications with other bus-coupled nodes. The control node acts as a master with a main-circuit domain during an initialization mode and when the main-circuit domain is deactivated, and acts as a slave, after completion of the initialization mode and when the main-circuit domain is not deactivated. An isolation circuit is used to isolate the main-circuit domain from the control node and, while the main-circuit domain is deactivated, to facilitate communications over the peripheral-side wired communications bus between the control node and another node connected to the peripheral-side wired communications bus.

Abstract: Examples disclosed herein relate to receiving a usage report from a printer, wherein the usage report comprises a count of pages printed and a time spent in a first power state; calculating a power consumption for the printer according to the usage report, and providing a report of historic power consumption.

Abstract: According to examples, an apparatus may include a fusing component and a heater disposed in the fusing component. The heater may include a substrate having a first surface and a second surface, a first heating element having a first length attached to the first surface of the substrate, and a second heating element having a second length attached to the second surface of the substrate, the second length differing from the first length.

Abstract: Aspects are directed to systems in which control node communicates through a peripheral-side wired communications bus for data communications with other bus-coupled nodes. The control node acts as a master with a main-circuit domain during an initialization mode and when the main-circuit domain is deactivated, and acts as a slave, after completion of the initialization mode and when the main-circuit domain is not deactivated. An isolation circuit is used to isolate the main-circuit domain from the control node and, while the main-circuit domain is deactivated, to facilitate communications over the peripheral-side wired communications bus between the control node and another node connected to the peripheral-side wired communications bus.

Abstract: An example replaceable printer component includes a communication engine. The communication engine indicates to a host an operation to be performed by the host. The replaceable printer component also includes a sensor engine to measure a property affected by the operation. The replaceable printer component includes a verification engine to determine whether the host performed the operation based on the measurement of the property.

Abstract: An example printer includes a non-transitory computer-readable medium. The printer also includes a boot engine communicatively coupled to the non-transitory computer-readable medium. The boot engine is to load a boot image into a first portion of the non-transitory computer-readable medium. The boot image includes data from an operational state of an operating system. The printer includes a configuration engine. The configuration engine is to program a second portion of the non-transitory computer-readable medium while the boot engine is loading the boot image.

Abstract: An example system includes a rectifying component to convert an alternating current (AC) signal into a direct current (DC) signal. The system also includes a filtering component. The filtering component determines that a plurality of AC cycle drops have occurred and will deactivate the AC signal in response to that determination. Furthermore, the system includes an isolating component. The isolating component consumes greater than a threshold level of power in one state and less than a threshold level of power in another state. The isolating component is operating in the state that consumes greater than a threshold level of power when the signal that indicates the AC voltage is at a level in which it may allow the device to operate safely and properly is deactivated.

Abstract: An example system includes a rectifying component to convert an alternating current (AC) signal into a direct current (DC) signal. The system also includes a filtering component. The filtering component determines that a plurality of AC cycle drops have occurred and will deactivate the AC signal in response to that determination. Furthermore, the system includes an isolating component. The isolating component consumes greater than a threshold level of power in one state and less than a threshold level of power in another state. The isolating component is operating in the state that consumes greater than a threshold level of power when the signal that indicates the AC voltage is at a level in which it may allow the device to operate safely and properly is deactivated.

Abstract: Examples disclosed herein relate to receiving a usage report from a printer, wherein the usage report comprises a count of pages printed and a time spent in a first power state; calculating a power consumption for the printer according to the usage report, and providing a report of historic power consumption.

Abstract: According to examples, an apparatus may include a fusing component and a heater disposed in the fusing component. The heater may include a substrate having a first surface and a second surface, a first heating element having a first length attached to the first surface of the substrate, and a second heating element having a second length attached to the second surface of the substrate, the second length differing from the first length.

Abstract: In one example, a printer with parallel/serial operational sequencing includes an engine control unit and an image processor unit each coupled to a set of sub-systems. A network unit is coupled to the image processor unit to monitor network packets while the engine control unit, the set of sub-systems, and the image processor unit are in sleep states. When a first predetermined packet is received, the network unit signals with a first modulation signal that the image processor unit is to awaken first before the image processor unit determines whether to awaken the engine control unit and any of the set of sub-systems. When a second predetermined packet is received, the network unit signals with a second modulation signal that the image processor unit, the engine control unit, and a portion of the set of sub-systems are to awaken at the same time.

Abstract: In one example, an integrated circuit device for a replaceable printer component to communicate information about the component to a printer controller when a component with the integrated circuit device is installed in a printer. The integrated circuit device includes a controller, a memory operatively connected to the controller to store and/or generate information about the component, a single pair of conductors to supply power to the controller and to carry data signals to and from the controller, a detector to detect incoming data signals with a signal property associated with the component, and two electrical contacts each connected to one of the conductors to connect the integrated circuit device to a printer controller when a component with the integrated circuit device is installed in a printer.

Abstract: In one example, an article for a replaceable printer component includes an integrated circuit device having a device controller, a conductor to supply power to the device controller and to carry a signal to and from the device controller, and a sensor operatively connected to the device controller to sense a voltage and/or a frequency on the conductor. The device controller to send an indication of a sensed voltage and/or a sensed frequency to the printer controller.

Abstract: A support of a heater in a fuser, the support including: two parallel sides and a back side, the three sides forming a U shaped cross section, the cross section having a non-uniform wall thickness.

Abstract: A support of a heater in a fuser, the support including: two parallel sides and a back side, the three sides forming a U shaped cross section, the cross section having a non-uniform wall thickness.

Abstract: In one example, an article for a replaceable printer component includes an integrated circuit device having a device controller, a conductor to supply power to the device controller and to carry a signal to and from the device controller, and a sensor operatively connected to the device controller to sense a voltage and/or a frequency on the conductor. The device controller to send an indication of a sensed voltage and/or a sensed frequency to the printer controller.

Abstract: An example replaceable printer component includes a communication engine. The communication engine indicates to a host an operation to be performed by the host. The replaceable printer component also includes a sensor engine to measure a property affected by the operation. The replaceable printer component includes a verification engine to determine whether the host performed the operation based on the measurement of the property.

Abstract: An example door lock includes a button with a first region and a second region. The button actuates among multiple positions upon being engaged. A first link member is aligned to the button to detect a state of engagement of a door to a consumables compartment of an electronic device. A sensor is aligned to the button and the first link member to receive a signal from a signal generator based on the state of engagement of the door. A second link member has a first end to align with the button, and a second end to engage the door. A transducer causes the first end to align with the button to disengage the second end from the door upon engagement of the button with the first end.