Sensing/control/identification devices for machines are provided. The devices include a first stage having a rectification and power conditioning module configured to receive electromagnetic (EM) transmissions via waveguide confinement and convert said EM transmissions to electrical power, a communication interface module configured to receive power from the rectification and conditioning module and at least one of receive or transmit EM transmissions/communications via waveguide confinement, and a control module configured to receive EM transmission data from the communication interface for processing and/or preparing EM communications for transmission. The devices further include a second stage having a tunable control module configured to process and convert instructions or commands from the control module of the first stage into analog or digital signals and generate and transmit an output signal. At least one connection is between the first stage and the second stage to enable communication between the first and second stages.

Sensing/control/identification devices for machines are provided. The devices include a first stage having a rectification and power conditioning module configured to receive electromagnetic (EM) transmissions via waveguide confinement and convert said EM transmissions to electrical power, a communication interface module configured to receive power from the rectification and conditioning module and at least one of receive or transmit EM transmissions/communications via waveguide confinement, and a control module configured to receive EM transmission data from the communication interface for processing and/or preparing EM communications for transmission. The devices further include a second stage having a tunable control module configured to process and convert instructions or commands from the control module of the first stage into analog or digital signals and generate and transmit an output signal. At least one connection is between the first stage and the second stage to enable communication between the first and second stages.

Introduced here are several embodiments of network switch modules having interfaces designed to enable use of different voltages or currents. Accordingly, a network switch may be able to support both optical interfaces and electrical interfaces on the same printed circuit board (e.g., a line card or a fabric card). In some embodiments, the printed circuit board includes a booster stage electrical interface that is designed specifically for optical interfaces. Such a design enables the components of a switch to operate with both electrical interfaces and optical interfaces.

Introduced here are several embodiments of network switch modules having interfaces designed to enable use of different voltages or currents. Accordingly, a network switch may be able to support both optical interfaces and electrical interfaces on the same printed circuit board (e.g., a line card or a fabric card). In some embodiments, the printed circuit board includes a booster stage electrical interface that is designed specifically for optical interfaces. Such a design enables the components of a switch to operate with both electrical interfaces and optical interfaces.

A dental pain and discomfort notification system for providing immediate feedback from a patient to a dentist, dental hygienist, or oral surgeon. The dental pain and discomfort notification system includes a notification panel mounted in proximity to a dental chair and an activation device. The activation device may be a hand-held device, such as a wireless remote, or may be mounted near the dental chair. The activation device includes one or more switches for activation by the patient. Each switch corresponds to a condition being experienced by the patient, such as pain, discomfort, or the need for suction. During a dental procedure, the switches may be activated by the patient to request a corresponding action by the dentist.

A dental pain and discomfort notification system for providing immediate feedback from a patient to a dentist, dental hygienist, or oral surgeon. The dental pain and discomfort notification system includes a notification panel mounted in proximity to a dental chair and an activation device. The activation device may be a hand-held device, such as a wireless remote, or may be mounted near the dental chair. The activation device includes one or more switches for activation by the patient. Each switch corresponds to a condition being experienced by the patient, such as pain, discomfort, or the need for suction. During a dental procedure, the switches may be activated by the patient to request a corresponding action by the dentist.

Methods and systems of powering a radio that can be mounted on a tower of a wireless communication system are provided in which a direct current (DC) voltage is provided to the radio over a power cable from a power supply configured to change the direct current (DC) output from the power supply based on a measured current level. The power supply is configured to change the DC voltage from a first voltage level to a second voltage level in response to the measured current being greater than or equal to a first threshold value.