Abstract: A print component integrated circuitry package includes a number of temperature sensors where each of the plurality of the temperature sensors is disposed in a corresponding temperature region of an integrated circuitry. In an example, an analog sense bus conductively connects to all of the plurality of temperature sensors and an external sensor pad that is to connect to a corresponding print controller contact.

Abstract: In one example in accordance with the present disclosure, a microfluidic device is described. The microfluidic device includes a reservoir to contain a first thermally expandable fluid, a first heater to heat the thermally expandable fluid in the reservoir, a channel extending from the reservoir and connected to the reservoir at a first opening, and a liquid volume obstructing the channel.

Abstract: A method may include maintaining a sample comprising an ionic species and an optical indicator at an elevated temperature above 25° C. on a semi-conductive microfluidic die during an incubation period, intermittently interrogating the sample with an interrogating light during the incubation period and sensing a response of the sample to the interrogating light, wherein the sample is interrogated with the interrogating light only during those times at which the sample is being sensed.

Abstract: A print component integrated circuitry package includes a number of temperature sensors where each of the plurality of the temperature sensors is disposed in a corresponding temperature region of an integrated circuitry. In an example, an analog sense bus conductively connects to all of the plurality of temperature sensors and an external sensor pad that is to connect to a corresponding print controller contact.

Abstract: A print component integrated circuitry package includes a number of temperature sensors where each of the plurality of the temperature sensors is disposed in a corresponding temperature region of an integrated circuitry. In an example, an analog sense bus conductively connects to all of the plurality of temperature sensors and an external sensor pad that is to connect to a corresponding print controller contact.

Abstract: The viscosity of a fluid may be determined using a flow rate determination. The flow rate may be determined based on fluid presence determinations within a capillary channel. Also, a temperature of an environment surrounding a capillary channel may be determined and signals may be transmitted to a thermal element responsive to the determined temperature.

Abstract: The present disclosure relates to nucleic acid detection devices. The nucleic detection device can include a microfluidic architecture to receive biological fluid, a multimodal sensor bundle, a common transmission line to transmit an enhanced current signal generated by combining current signals from individual sensors, and a current to voltage converter to receive and convert the enhanced current signal to voltage. The multimodal sensor bundle can be positioned to interact with the biological fluid when present within the microfluidic architecture. The multimodal sensor bundle can include multiple types of sensors selected from an electrochemical sensor, an optical sensor, or a potentiometric sensor. Individual sensors of the multimodal sensor bundle independently can generate a current signal in response to interaction with the biological fluid.

Abstract: An integrated circuit to drive a plurality of fluid actuation devices includes a contact pad and a programmable pulldown device. The programmable pulldown device is electrically coupled to the contact pad. The programmable pulldown device is settable to any one of a plurality of resistances.

Abstract: A print component integrated circuitry package includes a number of temperature sensors where each of the plurality of the temperature sensors is disposed in a corresponding temperature region of an integrated circuitry. In an example, an analog sense bus conductively connects to all of the plurality of temperature sensors and an external sensor pad that is to connect to a corresponding print controller contact.

Abstract: According to an example, a microfluidic apparatus may include a fluid slot and a foyer that is in fluid communication with the fluid slot via a channel having a relatively smaller width than the foyer. The microfluidic apparatus may also include an electrical sensor to measure a change in an electrical field caused by a particle of interest in a fluid passing through the channel from the fluid slot to the foyer, an actuator to apply pressure onto fluid contained in the foyer, and a controller to receive the measured change in the electrical field from the electrical sensor, determine, from the received change in the electrical field, an electrical signature of the particle of interest, and control the actuator to control movement of the particle of interest based upon the determined electrical signature of the particle of interest.

Abstract: An integrated circuit to drive a plurality of fluid actuation devices includes a contact pad and a programmable pulldown device. The programmable pulldown device is electrically coupled to the contact pad. The programmable pulldown device is settable to any one of a plurality of resistances.

Abstract: An integrated circuit to drive a plurality of fluid actuators is disclosed. The integrated circuit analog delay circuits coupled in series and to a fire input to receive a fire signal in succession. Each analog delay circuit receives the fire signal and, after a delay, provides the fire signal via an output to a corresponding fluid actuator. A bias circuit is coupled to each of the of analog delay circuits. The bias circuit provides a bias signal to control the delay.

Abstract: In one example in accordance with the present disclosure, a microfluidic device is described. The microfluidic device includes a reservoir to contain a first thermally expandable fluid, a first heater to heat the thermally expandable fluid in the reservoir, a channel extending from the reservoir and connected to the reservoir at a first opening, and a liquid volume obstructing the channel.

Abstract: The present disclosure is drawn to an insulated sensor including a silicon substrate with active circuitry on a surface thereof, an electrode disposed on the silicon substrate, a passivation layer having a thickness from greater than 500 Angstroms to 3,000 Angstroms disposed on the active circuitry, and an electrode insulating layer having a thickness from 10 Angstroms to 500 Angstroms disposed on the electrode.

Abstract: A method may include maintaining a sample comprising an ionic species and an optical indicator at an elevated temperature above 25° C. on a semi-conductive microfluidic die during an incubation period, intermittently interrogating the sample with an interrogating light during the incubation period and sensing a response of the sample to the interrogating light, wherein the sample is interrogated with the interrogating light only during those times at which the sample is being sensed.

Abstract: A fluidic die may include a number of actuators. The number of actuators form a number of primitives. The fluidic die may include a digital-to-analog converter (DAC) to drive a number of the delay circuits. The delay circuits delay a number of activation pulses that activate the actuators associated with the primitives to reduce peak power demands of the fluidic die. A number of delay circuits may be coupled to each primitive.

Abstract: One example provides a printhead including a plurality of printhead dies, each printhead die including at least one crack sense resistor. At least one analog bus is connected to each printhead die, the at least one analog bus to output voltages to facilitate a printer controller to determine whether at least one of the printhead dies is cracked.

Abstract: The viscosity of a fluid may be determined using a flow rate determination. The flow rate may be determined based on fluid presence determinations within a capillary channel. Also, a temperature of an environment surrounding a capillary channel may be determined and signals may be transmitted to a thermal element responsive to the determined temperature.

Abstract: The present disclosure is drawn to an insulated sensor including a silicon substrate with active circuitry on a surface thereof, an electrode disposed on the silicon substrate, a passivation layer having a thickness from greater than 500 Angstroms to 3,000 Angstroms disposed on the active circuitry, and an electrode insulating layer having a thickness from 10 Angstroms to 500 Angstroms disposed on the electrode.

Abstract: In some examples, a method of sensing an ink level includes applying a pre-charge voltage to a sense capacitor to charge the sense capacitor with a charge, sharing the charge between the sense capacitor and a reference capacitor, causing a reference voltage at a gate of an evaluation transistor, and determining a resistance from a drain to a source of the evaluation transistor that results from the reference voltage.