Hewlett-packard Development Company, L.P.

Tyler Phillip Kapp

Paul D Bliley

Duane A Koehler

Kenneth R Williams

Wesley R Schalk

Kris Randall Livingston

Howard G Wong

Dominique Gougeon

John Patrick Sturman

Frankie Alcazar

Michael Walters

In some examples, a controller may include a processing resource and a memory resource storing non-transitory machine-readable instructions that are executed to cause the processing resource to direct a clock signal of an imaging device to a fill port via a detection circuit of the imaging device, determine based on a state of a switch included in the detection circuit whether the fill port is open or closed, determine based on the state of the switch indicating the fill port is closed a status of the fill port, and in response to the status of the fill port being closed, determine based on a voltage of the clock signal whether the fill port is connected to a colorant container.

Statuses of fill ports

An example printing device may comprise an indicator to convey information to a user, a print substance reservoir to house a print substance, where the print substance reservoir is communicatively coupled to a fill port, a sensor to determine when a refill container is connected to the fill port, a processing resource, and a non-transitory machine-readable medium storing instructions executable by the processing resource to transmit signals to the indicator responsive to an indication that the sensor has detected the refill container connected to the fill port, where the signals correspond to the information to be conveyed by the indicator, and authenticate the refill container.

Print substance reservoirs

A system for reducing inrush current to an electronic component, the system including: a power supply, the power supply providing power at multiple non-zero voltages; and the electronic component; wherein, when the electronic component is connected to the power supply, the power supply provides a first non-zero voltage to the electronic component and, in response to a signal from the electronic component, provides a second voltage, the second voltage being higher than the first voltage, to the electronic component.

Electronics hot plug protection

Reducing power consumption of an electrical device is provided. The electrical device includes a first and a second module. The first and second modules include a first and a second memory, and a first and second system on chip (SoC) respectively. The first and second SoCs include a first and a second micro-processor respectively. A PCI-e bus connects the modules. The second module enters a sleep mode state that includes a first and a second sleep mode. The second module transitions between the first and second sleep modes while in the sleep mode state. The second SoC reduces a power state of the second module during the first sleep mode, and powers off the second SoC during the second sleep mode.

Multi sleep mode power saving

A circuit includes a pulse generator to generate an output pulse in response to a signal representing rotation of a fan. A timing relationship between output pulses represents speed of the fan. A filter circuit converts the output pulse to a direct current (DC) voltage signal proportional to the speed of the fan. A monitor circuit monitors the DC voltage signal with respect to a predetermined threshold and generates a control signal that disables a printer dryer if the DC signal does not satisfy the predetermined threshold.

Printer dryer monitor

In one example, an apparatus includes a first switch array including a first plurality of switches. A first resistor array includes a first plurality of resistor pairs, where each resistor pair in the first plurality of resistors is coupled to one switch of the first plurality of switches. The apparatus also includes a second switch array including a second plurality of switches. A second resistor array includes a second plurality of resistor pairs, where each resistor pair in the second plurality of resistors is coupled to one switch of the second plurality of switches. The apparatus further includes a plurality of output nodes configured to transmit an analog voltage, where each output node of the plurality of output nodes is connected to one resistor pair of the first resistor array and one resistor pair of the second resistor array.

Switch and resistor array for detecting paper tray dimensions

A printer tray printed circuit assembly may include a board, a processing unit supported by the board, an output connector connected to the processing unit and supported by the board and an input connector supported by the board. The input connector is connectable to an interconnect to connect the first printer tray printed circuit assembly to a second printer tray printed circuit assembly. Signal altering circuitry carried by the board automatically alters an output signal of the output connector in response to the input connector being connected to the interconnect. The altered output signal indicates a configuration of a printer tray configuration.

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Vancouver, WA, United States of America

Tyler Phillip Kapp