Abstract: An arc fault circuit interrupter test circuit is disclosed. The test circuit incorporates a controller along with at least one power transistor, a current sense circuit and a voltage sense circuit. When the power transistor is operated, the current flowing through the transistor is sensed, and if the current is not at least equal to a threshold value, the voltage at which the power transistor is operated is increased.

Abstract: An arc fault circuit interrupter test circuit is disclosed. The test circuit incorporates a controller along with at least one power transistor, a current sense circuit and a voltage sense circuit. When the power transistor is operated, the current flowing through the transistor is sensed, and if the current is not at least equal to a threshold value, the voltage at which the power transistor is operated is increased.

Abstract: An arc fault circuit interrupter test circuit is disclosed. The test circuit incorporates a controller along with at least one power transistor, a current sense circuit and a voltage sense circuit. When the power transistor is operated, the current flowing through the transistor is sensed, and if the current is not at least equal to a threshold value, the voltage at which the power transistor is operated is increased.

Abstract: An arc fault circuit interrupter test circuit is disclosed. The test circuit incorporates a controller along with at least one power transistor, a current sense circuit and a voltage sense circuit. When the power transistor is operated, the current flowing through the transistor is sensed, and if the current is not at least equal to a threshold value, the voltage at which the power transistor is operated is increased.

Abstract: An evidence chain of custody system that is application-specific auditable and trackable secure smart mobile containers (SMC) for securely storing evidence items that are collected at crime scenes and search locations pursuant to subpoenas or warrants. Each SMC includes a electronics package that can read RF tags applied to evidence bags or totes placed in the SMC or for oversized items, associated with the event or scene, that are tagged with active RF tags. The electronics package also includes condition sensors and an RF transmitter module to permit remote reporting and monitoring of GPS/RSSI location and condition. The SMC includes an electronic lock that provides access security and an audit trail of all opening, closing, and other events.

Abstract: A universal food holding cabinet has multiple compartments, the temperatures of which are under software control by microprocessors or microcontrollers located on power supply circuit boards for corresponding compartments. Each compartment can have different temperature control requirements with different requirements being met by a different program in different processors, or different operating parameters for the same program. The cabinet is configured to prevent the power supply boards from being installed incorrectly, to provide an address to a power supply circuit board when it is installed and by which a power supply circuit can be addressed by a master controller.

Abstract: A universal food holding cabinet has multiple compartments, the temperatures of which are under software control by microprocessors or microcontrollers located on power supply circuit boards for corresponding compartments. Each compartment can have different temperature control requirements with different requirements being met by different programs in different processors, or different operating parameters for the same program. The cabinet is configured to prevent the power supply boards from being installed incorrectly, to provide an address to a power supply circuit board when it is installed and by which a power supply circuit can be addressed by a master controller to receive downloads of executable instructions and/or data.

Abstract: A testing system includes a hand-held transmitter that plugs into a receptacle electrically coupled to a selected branch circuit. The transmitter includes a circuit effective to test an arc fault circuit interrupter electrically coupled to the branch circuit by creating a first pulse on the branch circuit that is effective to trip the arc fault circuit interrupter. The transmitter can perform at least one additional test including: determining whether the receptacle is wired properly; determining a location of a circuit interrupting device electrically coupled to the branch circuit by creating a second pulse on the branch circuit that can be sensed by a receiver located proximately to the respective circuit interrupting device and broadly tuned about a frequency of the second pulse; and testing a ground fault circuit interrupter electrically coupled to the branch circuit by creating a third pulse on the branch circuit that is effective to trip the ground fault circuit interrupter.

Abstract: A circuit interfaced between a first USB host and a second USB host for providing unidirectional transmission of data signals from the first USB host to the second USB host is provided. A first converter circuit is operable to receive data signals from the first USB host and convert them from a USB protocol to a second communications protocol. A second converter circuit is operable to receive the converted data signals from the first converter circuit and convert them from the second communications protocol to the USB protocol for transmission to the second USB host. The first and second converter circuits are electrically connected to each other in such a manner as to provide a transmission path from the first USB host to the second USB host and to disable a transmission path from the second USB host to the first USB host.

Abstract: A two-wire communications system is disclosed. The disclosed communications system uses a distributed power line and a distributed common line to transmit messages. A power transistor is operated to transmit either a logical high or a logical low using the two signal lines.

Abstract: A testing system includes a hand-held transmitter that plugs into a receptacle electrically coupled to a selected branch circuit. The transmitter includes a circuit effective to test an arc fault circuit interrupter electrically coupled to the branch circuit by creating a first pulse on the branch circuit that is effective to trip the arc fault circuit interrupter. The transmitter can perform at least one additional test including: determining whether the receptacle is wired properly; determining a location of a circuit interrupting device electrically coupled to the branch circuit by creating a second pulse on the branch circuit that can be sensed by a receiver located proximately to the respective circuit interrupting device and broadly tuned about a frequency of the second pulse; and testing a ground fault circuit interrupter electrically coupled to the branch circuit by creating a third pulse on the branch circuit that is effective to trip the ground fault circuit interrupter.

Abstract: A circuit interfaced between a first USB host and a second USB host for providing unidirectional transmission of data signals from the first USB host to the second USB host is provided. A first converter circuit is operable to receive data signals from the first USB host and convert them from a USB protocol to a second communications protocol. A second converter circuit is operable to receive the converted data signals from the first converter circuit and convert them from the second communications protocol to the USB protocol for transmission to the second USB host. The first and second converter circuits are electrically connected to each other in such a manner as to provide a transmission path from the first USB host to the second USB host and to disable a transmission path from the second USB host to the first USB host.

Abstract: A testing system includes a hand-held transmitter that plugs into a receptacle electrically coupled to a selected branch circuit. The transmitter includes a circuit effective to test an arc fault circuit interrupter electrically coupled to the branch circuit by creating a first pulse on the branch circuit that is effective to trip the arc fault circuit interrupter. The transmitter can perform an additional test of determining whether the receptacle is wired properly.

Abstract: Methods and systems consistent with the present invention provide for annunciating a measured electrical value. A handheld electrical tester measures an electrical characteristic. A processor determines one or more spoken words corresponding to a value of the measured electrical characteristic. The one or more spoken words are annunciated via a speaker.

Abstract: A testing system includes a hand-held transmitter that plugs into a receptacle electrically coupled to a selected branch circuit. The transmitter includes a circuit effective to test an arc fault circuit interrupter electrically coupled to the branch circuit by creating a first pulse on the branch circuit that is effective to trip the arc fault circuit interrupter. The transmitter can perform at least one additional test including: determining whether the receptacle is wired properly; determining a location of a circuit interrupting device electrically coupled to the branch circuit by creating a second pulse on the branch circuit that can be sensed by a receiver located proximately to the respective circuit interrupting device and broadly tuned about a frequency of the second pulse; and testing a ground fault circuit interrupter electrically coupled to the branch circuit by creating a third pulse on the branch circuit that is effective to trip the ground fault circuit interrupter.