Abstract: A retrofit LED lamp assembly and retrofitting method for use in a vending machine. The retrofit LED assembly having a plurality of light emitting diodes (LEDs) and a power connector adapted to connect to a source of power within a vending machine. A power regulating circuit adjustably controls the amount of power provided to the LEDs in response to control signals received by a communication circuit in the lamp assembly.

Abstract: A vending machine includes a controller with an interface to control vending machine peripherals including an integrated LED lamp assembly having a plurality of light emitting diodes (LEDs) and a DC power connector to connect to a source of DC power within the vending machine. A power regulating circuit adjustably controls the amount of power provided to the LEDs in response to vending machine standard control signals received from the vending machine via a communication circuit compatible with the vending machine controller interface.

Abstract: A vending machine includes a controller with an interface to control vending machine peripherals including an integrated LED lamp assembly having a plurality of light emitting diodes (LEDs) and a DC power connector to connect to a source of DC power within the vending machine. A power regulating circuit adjustably controls the amount of power provided to the LEDs in response to vending machine standard control signals received from the vending machine via a communication circuit compatible with the vending machine controller interface.

Abstract: A vending machine includes a controller with an interface to control vending machine peripherals including an integrated LED lamp assembly having a plurality of light emitting diodes (LEDs) and a DC power connector to connect to a source of DC power within the vending machine. A power regulating circuit adjustably controls the amount of power provided to the LEDs in response to vending machine standard control signals received from the vending machine via a communication circuit compatible with the vending machine controller interface.

Abstract: The present invention is an efficient, long life alternative to conventional vending machine fluorescent lamp light sources that provides added control capabilities. More specifically, the present invention provides reduced energy use, improved safety, extended life, and allows attention-getting use of the machine lighting.

Abstract: A coin handling apparatus includes a coin storage container having conductive electrodes disposed along sides of the coin storage container. The coin handling apparatus also includes a voltage generator. A processor controls the voltage generator to provide output signals to excite the electrodes at multiple frequencies. The processor is configured to determine a resonant frequency based on levels of reflected power resulting from the output signals and to estimate a number of coins in the container based on the resonant frequency.

Abstract: A low power control apparatus for a coin operated telephone controls a full range of phone functions as well as an electronic coin acceptor. The control utilizes phone line power. Power for all the normal operations of the coin operated telephone and its coin acceptor is also supplied from the phone line. The control is preferably microcontroller based and designed utilizing low power components. In the control, an interface circuit serves to connect the phone tip and ring lines to either a power supply circuit or to a totalizer and escrow control circuit. The power supply also provides power to an audio network including a variety of fraud prevention circuits, a modem, and several time generator circuits. A monitor system monitors the status of several security switches to monitor the phone's condition. Hardware and software design features control the application of power to circuits only when needed.

Abstract: A power supply apparatus for a radar system of the type which has a control box including signal processing means and a source of electrical power, an antenna unit remote from the control box and including an antenna, a transmitter, a receiver and an IF amplifier, and a coupling cable of variable length between the control box and the antenna unit, the coupling cable coupling signals to and from the antenna unit as well as a power supply voltage and a tuning control voltage. The power supply apparatus comprises a switching mode power supply circuit having an input supplied with the power supply voltage and an output for providing a substantially stable output supply voltage for the receiver. A feedback circuit is responsive to the output supply voltage and is coupled to a control input of the switching mode power supply circuit for adjusting the operation of that circuit so as to maintain the output supply voltage substantially stable.

Abstract: Improved radar apparatus includes a rotatable antenna structure which includes an antenna disposed within a housing which is rotatably driven. Also disposed within the rotatable housing are a unitary magnetron, microwave circulator and microwave limiter device which rotates when the housing is rotatably driven. Additionally, a transmitter, such as a modulator coupled to the unitary device and a receiver also coupled to the unitary device are disposed within the rotatable housing. Preferably, the antenna is formed as a slotted wave guide antenna. Radar signals transmitted from and reflected to the antenna pass through a slotted filter which is mounted in front of the antenna. A commutator, preferably formed of slip rings and brushes, serves to electronically connect the transmitter and receiver within the housing to signal processing circuitry fixedly disposed externally of the housing, thereby permitting the housing to rotate while coupling electrical signals to and from the transmitter and receiver.

Abstract: This circuit includes a DC source in series with a load to be energized, the DC source also being coupled to a constant-current circuit coupled to the input of an output-signal-generating means. The latter produces an output signal in response to the detection by an associated sensor of a changing condition monitored by the sensor. When the signal-generating means detects a change, an SCR coupled to the DC source is turned on thereby by-passing all of the DC from said source around said constant current source. Simultaneously, the signal-generating means causes an associated LED to emit a light signal.