Other

Prodigit Electronics Co., Ltd.

Ceramicro Technology Corp.

Daniel Liu

Lincoln Tseng

Johnson Wu

Dragon Chang

A power plug adapter with a magnetically attachable module is provided. A signal transmission device is connected with the power plug adapter and the magnetically attachable module. At least one magnetic unit is arranged on the power plug adapter, and at least one counterpart magnetic unit is arranged on the magnetically attachable module. When the magnetically attachable module and the power plug adapter are arranged to have attachment surfaces thereof adjacent to and facing each other, the counterpart magnetic unit of the magnetically attachable module magnetically attracts the attachment surface of the power plug adapter to have the magnetically attachable module and the power plug adapter attached to each other magnetically.

Power plug adapter with magnetically attachable module

The present invention discloses an electronic tag time sharing control system and a method thereof, and the system comprises a server, at least one coordinator and a plurality of wireless electronic tags. The server transmits a time-sharing control signal. The coordinator and the server form a wireless connection for receiving and transmitting the time-sharing control signal. The wireless electronic tags and the coordinators form a wireless connection. After each wireless electronic tag receives the time-sharing control signal, different sleep cycle and wakeup timing are generated to update display information sequentially. A portion of the wireless electronic tag is situated at a sleep status and a portion of the wireless electronic tag is situated at a standby status to receive the update display information, so as to achieve the effects of saving bandwidth, reducing packet collisions and extending the service life of the wireless electronic tag.

Electronic tag time-sharing control system and method thereof

An electronic timer graphically displaying programmed ON/OFF settings includes a microprocessor; a time setting unit electrically connected to the microprocessor for a user to set at least one programmed ON/OFF setting for at least one selected day; a memory unit electrically connected to the microprocessor for storing the programmed ON/OFF setting; a clock signal generating unit electrically connected to the microprocessor for generating a clock signal to the microprocessor; and a graphic time scale display unit electrically connected to the microprocessor and including a plurality of time scale segments, each of which represents a predetermined time period. The microprocessor calculates based on the programmed ON/OFF settings to derive all the time scale segments that are corresponding to the programmed ON/OFF settings, and drives the graphic time scale display unit to show the time scale segments corresponding to the programmed ON/OFF settings.

Electronic timer with graphic time scale display panel

An electrical load status detection and control device includes a first power supply circuit loop with a first switch, a second power supply circuit loop with a second switch, a no-load status detection unit connected with the second power supply circuit loop for detecting the current passing through the second power supply circuit loop and thereby generating a current detection signal. A micro-controller connected with a reference current value database, the no-load status detection unit, the first switch and the second switch, which receives the current detection signal from the no-load status detection unit. The micro-controller generates a switching signal to actuate the first switch and the second switch to thereby open the first power supply circuit loop and the second power supply circuit loop when detecting the current passing through the second power supply circuit loop out of the reference current value range of the reference current value database.

Electrical load status detection and control device

A power regulation device is connected between a power source and a load for receiving receive first voltage from the power source and providing a second voltage to the load. The power regulation device includes a first voltage detection circuit for detecting the first voltage and a second voltage detection circuit for detecting second voltage. A controller receives signals representing the first and second voltages and compares the signals with preset references to issue control signals. A switch circuit is connected between the power source and the load and is coupled to and controlled by the controller. The switch circuit is controlled by the control signals of the controller to change from the first state to a second state for selectively passing the first voltage and inducing different levels of the second voltage which are associated with different powers supplied to the load.

Digital controlled power regulation device

A relay control circuit is connected between a power source supplying an alternate current and a load to which the alternate current is supplied. The relay control circuit includes contacts for conducting/cutting off the alternate current supplied from the power source to the load. A first zero-crossing detection circuit is connected to the power source and generating a first zero-crossing signal to a control unit having a memory unit storing a time delay parameter. The control unit issues a control signal to energize a coil for actuating the contacts at a time point that leads the zero crossing point of the alternate current a time period equal to the time delay parameter whereby the contacts are actually actuated at a time point corresponding to the zero-crossing point. A second zero-crossing detection circuit is coupled to the load and generates a second zero-crossing signal. In case of deterioration of the performance of the relay, a difference exists between the time of detection of the second zero-crossing signal and the time point of the time delay parameter after the control signal. The difference is used to correct the time delay parameter.

Spark elimination circuit for controlling relay contacts

A safety control circuit for an electric water heater includes a voltage detection circuit, a current detection circuit, a load-resistance calculation unit, and a central processing unit. The load-resistance calculation unit calculates load-resistance reference value and dynamic load-resistance values based on voltage value and current value detected by the voltage detection circuit and the current detection circuit, respectively. The central processing unit determines whether there is water supplied to the electric water heater based on the load-resistance reference value and the dynamic load-resistance values sent to the central processing unit by the load-resistance calculation unit. When a difference between the two values is larger than a predefined value, the central processing unit drives a switch to turn off and thereby cut off power supply to the water heater.

Safety control circuit for electric water heater

A power monitoring module with a display unit configured to be mounted on an electrical power source device, such as uninterrupted power supply or a power strip, for indicating a plurality of electrical parameters is disclosed. The power monitoring module includes a casing provided with a central open area and a plurality of through holes thereon, and a printed circuit board are mounted to the casing. A control circuit is arranged on the printed circuit board and electrically coupled to the power source device for detecting the electrical parameters of the electric appliance plugged on the power source device. A plurality of operation keys are arranged on the printed circuit board, corresponding to the through holes formed on the casing. A display unit arranged on the printed circuit board, corresponding to the central open area of the casing for displaying at least one of the plurality of electrical parameters detected by the control circuit.

Power monitoring module with display unit for electrical power source device

A digital illumination adjusting circuit used to adjust the output to a power level of an alternating load via a digital setting manner is disclosed. The digital illumination adjusting circuit includes a microprocessor unit, a power phase detecting circuit, a time base signal generating circuit, a display, and an input pad. The microprocessor unit receives a phase synchronization signal from the power phase detecting circuit, utilizing half cycle of the alternating current power as a counting period, utilizing a time base signal generated from the time base signal generating circuit as counting pulses for the counting period. The microprocessor generates a switch control signal for controlling a conductive angle of the switch circuit which in turn controls the power output to the load.

Digital illumination adjusting circuit

A circuit arrangement for simulating an alternating current load. The simulating circuit includes a current waveform generating circuit capable of generating a phase control signal with a phase angle coherent, lagged, or leading to that of the alternating current power source voltage. A voltage and current phase control circuit generates a first and second switching control signals according to the phase control signal generated by the current waveform generating circuit and a series of counting pulses generated by a voltage zero-crossing detecting circuit. The switching control signals are used to control a switch circuit so as to generate a power source current with a phase angle coherent, lagged, or leading to the phase angle of the power source voltage.

Circuit arrangement for simulating alternating current load

An electric adapter with a display unit capable of indicating various electrical parameters of an electric appliances is disclosed. The adapter includes a housing, a plug, an outlet socket, a control circuit and a display unit. The adapter is electrically connected between an electric socket and the electric appliance. When the electric appliance works, the control circuit detects various electrical parameters of the electric appliance and then displays the electrical parameters on the display unit. The electrical parameters includes present time, voltage value, current value, watt, kilowatt-hour, apparent power value, power factor.

Electric adapter with display unit

An alternating current power control device for controlling the amount of power energy supplied to an electric load by controlling the cycle numbers of an alternating current power source in a predetermined cycle period is disclosed. The control device includes a voltage zero-crossing detecting circuit, a current detector, a power adjusting circuit, a control unit, an output driving circuit, and a switching circuit. The switching circuit is connected in series between the alternating current power source and the load. The control unit generates a control signal to control the switching circuit according to a voltage counting pulses generated by the voltage zero-crossing detecting circuit, a current counting pulse generated by the current detector, and a power adjusting signal generated by the power adjusting circuit to determine the cycle numbers of the alternating current power source supplied to the load.

Alternating current power control device

An AC load simulator for simulating the waveforms of capacitive reactance, inductive reactance, impedance or any waveform in an A.C. circuit for a better understanding and inspecting of the working status of an A.C. supply or a power part in a specific load. The simulator mainly comprises a waveform generator, an analogy signal insulating amplifier, an electronic A.C. load and a compensation circuit, wherein the waveform generator produces sinusoidal wave or any other signal in waveform. The above parts together with the circuit, an A.C. load simulator for generating any kind of waveform is integrated.

AC load simulator

A roll-camber grinding apparatus includes a base having a pair of linear bearings parallelly fixed to a flat face of the base. A sliding seat is slidably mounted on the linear bearings. A power-driven grinding wheel is mounted on the sliding seat. An adjusting screw rod is transversely and rotatably mounted on the sliding seat. A first roller bearing is threadably connected to the adjusting screw rod so that the first roller bearing is moved transversely when the adjusting screw rod is axially rotated. An elongated swinging link is pivoted on the base near the adjusting screw rod and has two opposed first and second sides. A second roller bearing is mounted to the second side of the swinging link. A cam is rotatably mounted to the base near the second roller bearing. A spring member is provided for urging the first roller bearing to abut against the first side of the swinging rod and the second roller bearing to abut against the cam so that the sliding seat and the grinding wheel on the sliding seat can be moved back and forth with a stroke when the cam is rotated one revolution. A step motor, provided for driving said cam to rotate, has a given rotating speed controlled by a frequency-setting circuit.

Growing community of inventors

Taipei Hsien, Taiwan

Daniel Liu