Abstract: A power supply configured for installation in a vehicle is disclosed herein. The vehicle includes a battery, an on-board diagnostics (OBD) port, and a vehicle accessory. In at least one embodiment, the power supply includes a controller area network (CAN) input configured for connection to a CAN pin of the OBD port, a battery input configured for connection to a battery pin of the OBD port, at least one power output configured for connection to a vehicle accessory, and a controller circuit. The controller circuit is configured to (i) monitor a CAN voltage provided via the CAN input, (ii) monitor a battery voltage provided via the battery input, and (iii) selectively deliver power to the at least one power output depending at least in part on the CAN voltage and the battery voltage.

Abstract: A power supply configured for installation in a vehicle is disclosed herein. The vehicle includes a battery, an on-board diagnostics (OBD) port, and a vehicle accessory. In at least one embodiment, the power supply includes a controller area network (CAN) input configured for connection to a CAN pin of the OBD port, a battery input configured for connection to a battery pin of the OBD port, at least one power output configured for connection to a vehicle accessory, and a controller circuit. The controller circuit is configured to (i) monitor a CAN voltage provided via the CAN input, (ii) monitor a battery voltage provided via the battery input, and (iii) selectively deliver power to the at least one power output depending at least in part on the CAN voltage and the battery voltage.

Abstract: Controlling a stepper motor. A stepper motor is driven towards an index position. An attempt is made to stop the stepper motor on the index position in a fashion that would ordinarily cause the stepper motor to ring at the index position. Characteristics of one or more subsequent pulses that would counteract the ringing are determined. The one or more determined subsequent pulses are issued to the stepper motor.

Abstract: Detecting an extreme temperature event. A method includes collecting raw data from a high resolution sensor. The method further includes identifying in the raw collected data one or more changing data point values. The method further includes identifying, in the raw collected data that the one or more changing data point values have reached a determined threshold that indicates with a high level of probability that an extreme temperature event has occurred. Alternatively, the method may include identifying in the raw collected data a sudden extreme increase in one or more data point values that cross a threshold which indicates with a high level of probability that an extreme temperature event has occurred. As a result, the method includes issuing an alert indicating that an extreme temperature event has occurred.

Abstract: Controlling a stepper motor. A stepper motor is driven towards an index position. An attempt is made to stop the stepper motor on the index position in a fashion that would ordinarily cause the stepper motor to ring at the index position. Characteristics of one or more subsequent pulses that would counteract the ringing are determined. The one or more determined subsequent pulses are issued to the stepper motor.

Abstract: Detecting an extreme temperature event. A method includes collecting raw data from a high resolution sensor. The method further includes identifying in the raw collected data one or more changing data point values. The method further includes identifying, in the raw collected data that the one or more changing data point values have reached a determined threshold that indicates with a high level of probability that an extreme temperature event has occurred. Alternatively, the method may include identifying in the raw collected data a sudden extreme increase in one or more data point values that cross a threshold which indicates with a high level of probability that an extreme temperature event has occurred. As a result, the method includes issuing an alert indicating that an extreme temperature event has occurred.

Abstract: A test strip for analyzing a biological fluid using a test meter includes a biosensor to sense the biological fluid. The test strip includes contacts to communicate with the test meter and conductors connected to the contacts. The test strip further includes a combination of diodes, resistors, and short circuits arranged in various ways between the conductors. The test strip stores data based on a number of connections severed between the diodes, the resistors, the short circuits, and the conductors. The test meter reads the data and communicates with the biosensor via the contacts.

Abstract: A test strip for analyzing a biological fluid using a test meter includes a biosensor to sense the biological fluid. The test strip includes contacts to communicate with the test meter and conductors connected to the contacts. The test strip further includes a combination of diodes, resistors, and short circuits arranged in various ways between the conductors. The test strip stores data based on a number of connections severed between the diodes, the resistors, the short circuits, and the conductors. The test meter reads the data and communicates with the biosensor via the contacts.

Abstract: A system including a modem locally generates a web page based graphical User interface for display to a user on a PC using different standardized browser applications and enabling a User to control or configure system functions. A processing system supports Internet compatible bi-directional communication and employs a method for providing local access to processing system parameters. The method involves receiving a locally initiated User command requesting access to a web page and validating authorization of the User command. The method also involves generating an Internet compatible web page for display containing a system parameter associated with the bi-directional communication in response to the validated User command.

Abstract: A method and apparatus are disclosed for detecting disturbances in an alternating current (AC) supply. A method includes a step of indicating a relationship between supplied AC voltage and a threshold voltage for at least a portion of each cycle of the supplied AC voltage. A circuit for detecting disturbances in supplied alternating current (AC) is provided. The circuit includes a threshold detector coupled to a source of supplied AC. The threshold detector provides a signal indicating a relationship of the supplied AC levels to a threshold level for at least a portion of each cycle of the supplied AC.

Abstract: Disclosed are a method and bi-directional communication device, such as a cable modem, router, bridge, or other communication device adapted to communicate via a network and having a firewall, for identifying those packets associated with inappropriate activity. The communication device includes at least one user discernable indicator associated with the firewall. The at least one user discernable indicator contemporaneously indicates that a number of packets associated with the inappropriate activity has exceeded a threshold level.

Abstract: Telephone line status indication is improved by making measurements of the differential voltage across the Tip-Ring terminals of a telephone set. The telephone set is connected to a telephone line which is shared with other parallel-connected sets. The measurement of differential line voltage is made time the set changes state (i.e., between on-hook and off-hook). The maximum magnitude of one of the last three measurements is stored to represent the state, and is arithmetically averaged with the maximum magnitude of one or the last three stored for the oil-hook state to create a reference voltage. The reference voltage is updated each time the telephone set changes state and is continually compared with the present differential line voltage to determine which one is larger A light-emitting-diode on the telephone set indicates that the telephone line is in use whenever the reference voltage exceeds the measured differential line voltage.

Abstract: An electrical product uses a small battery, which is permanently soldered into the product, to protect certain critical circuits such as volatile memory when primary power is removed. The life of such a battery is extended by disabling it during the time interval between factory testing and first use by a customer so that it does not drain during transportation and storage. During factory testing, instructions stored in volatile memory are delivered to a microprocessor that cause it to generate a unique signal that resets a switch and thereby disables the battery. These instructions are down-loaded into the volatile memory and executed as part of the final factory test procedure. When the primary power source is removed from the product following factory test, these instructions are lost (erased) because the battery is disabled at this time. The microprocessor is arranged to set the switch, and thereby enable the battery, each time primary power is subsequently applied or removed from the product.

Abstract: A loudspeaking telephone station (speakerphone) includes a loudspeaker and one or more microphones within the same housing. The microphones are directional, each having a polar response characteristic that includes a major lobe, one or more side lobes, and nulls between pairs of lobes. The loudspeaker is positioned in the null of the polar response characteristic that resides between the major lobe and an adjacent side lobe. The microphone apparatus is positioned so that its major lobe is aimed in a direction that is generally perpendicular to the direction that the loudspeaker is aimed. Means are provided for increasing the distance between input sound ports of a first-order-gradient (FOG) microphone and thereby improving its sensitivity. A pair of such improved FOG microphones are used in assembling a second-order-gradient microphone. Full duplex operation is achieved when a pair of echo cancelers are added to further reduce the coupling between the transmit and receive directions of the speakerphone.

Abstract: Scanning equipment for a low-cost facsimile machine which includes a variable gain amplifier and a comparator circuit for correcting nonuniformities in lighting, lenses, light sensors and the like. Each line of a document being scanned is subdivided into a number of picture elements that individually suffer from different degrees of nonuniformity. Stored correction signals, associated with each picture element, are used by the variable gain amplifier and the comparator in processing an analog output signal from the line scanner to thereby correct nonuniformities. In one illustrative embodiment of the invention, the stored correction signals regulate the magnitude of the line scanner's analog output signal which is then compared with a fixed black/white threshold voltage. In another illustrative embodiment of the invention, the stored correction signals are used to generate a number of black/white threshold voltages which are then compared with the line scanner's analog output signal.

Abstract: A digital-to-analog signal converter (1000) provides an analog output signal by subtracting bit currents reflecting a digital input signal from a constant current source (1004, 1018-1022) at a current summer (1003), with the difference current being applied to a constant load. The subtracting of the current, rather than switching the current, avoids the modulation of an associated power source since the total current demand remains the same. In that low power operation is possible, the converter is particularly suited for use in an arrangement where only a low level of operating current is available from a power source.

Abstract: In a multifrequency generator providing tone signaling for a telephone, the common switching functions are performed by solid state switching circuitry (1200). Improved signal transfer between the telephone line and transmit and receive transducer of the telephone is provided by arranging the solid-state transmit and receive switches (1201, 1401) in a gain configuration to increase the level of the speech signal. The tone signals are digitally synthesized and use an integrated R-C oscillator (600) as a reference. Button down and button up debouncing of a contact closure signal from a single contact per button keypad is provided.