Abstract: Pulse type activating system for power supply, composed of a boosting circuit, a pulse width modulating (PWM) circuit, a sine-wave generating circuit, an MOSFET output circuit, an analog-to-digital converting circuit (ADC), a temperature sensing circuit, an overload detecting circuit, a short circuit detecting circuit, a warning circuit and a CPU. The CPU collectively controls the above circuits and in the instant of activation of the load, the CPU provides intermittent high voltage for shortening the activation time of the load. The CPU also provides protection effect for the load.

Abstract: Switchable mosquito expelling/killing device including a box body having a clip body for hanging the box body on a user's body. The box body is disposed with a pushing block, an electric mosquito incense mat insertion hole, gas releasing slots, DC socket and a switch. An oscillating circuit and a heater fixing seat, an electric heater and a cell for supplying power are disposed in the box body. The box body can be co-used with a transformer socket to be used indoors. By means of switching the switch outside the box body, the mosquito expelling/killing device can be switched between a mosquito expeller using the oscillating circuit to-generate a sound wave simulating the sound wave of male mosquitoes for expelling fertilized female mosquitoes and an electric mosquito incense device using the electric heater to heat electric mosquito incense mat for releasing mosquito-killing incense to kill the mosquitoes.

Abstract: Switchable mosquito expelling/killing device including a box body having a clip for hanging the box body on a user's body. The box body is disposed with a pushing block, an electric mosquito incense mat insertion hole, gas releasing slots and a switch. An oscillating circuit and a heater fixing seat, an electric heater and a cell for supplying power are disposed in the box body. By means of switching the switch, the mosquito expelling/killing device can be switched between a mosquito expeller using the oscillating circuit to generate a sound wave simulating the sound wave of male mosquitoes for expelling fertilized female mosquitoes and an electric mosquito incense device using the electric heater to heat electric mosquito incense mat for releasing mosquito-killing incense to kill the mosquitoes.

Abstract: An induced AC power source video amplifier includes a signal amplifying circuit, a transformer, and a plastic material shell. One end of the transformer is connected to a metal AC line input prong, and another end is connected to supply power to a signal amplifying circuit. The signal amplifying circuit and transformer are fixed to the plastic material shell so that the metal prong projects to the outside of the shell. The shell further includes input and output terminals and selective switches, including a gain select switch and an input select switch.

Abstract: A car-used spare power system quick charging device including a switch, a boosting circuit, a detecting circuit, an indicating circuit, an unstable circuit, a pulse cutting circuit and multiple charging batteries. The detecting circuit serves to detect the voltage state of the charging battery. The indicating circuit serves to indicate the voltage state of the charging battery detected by the detecting circuit. The switch is used to switch the charging/discharging modes. When the charging battery is detected to be in middle or low voltage state, the boosting circuit serves to boost the charging battery into high voltage. The charging battery charges/discharges the car battery by way of pulse so as to protect the charging battery from damage due to over-heating and make the charging battery 100% release voltage.

Abstract: A heat-radiating structure of power adapter, including an outer housing, a front sealing board, a rear sealing board, a circuit board, a heat-conducting member and a bottom board. At least one side of the circuit board is connected with a heat-conducting member. The heat-conducting member is disposed between multiple heat-conducting rubbers and the outer housing and padded by an insulative heat-conducting sheet. A metal plate formed with thread hole is together with the heat-conducting member screwed in the outer housing. The heat-conducting rubber and insulative heat-conducting sheet serve to evenly conduct the heat to the outer housing. The exhaustion fan serves to suck in air to cool the metal plate in the outer housing so as to greatly increase the heat-radiating area and achieve a better heat-radiating effect.

Abstract: An ozone/supersonic wave insect expelling device has an ozone generating circuit and a supersonic wave generating circuit which use the same power source so to generate supersonic wave for expelling pest insect, and for generating ozone for clearing the air. Therefore, ozone/supersonic wave insect expelling device has a dual effect.

Abstract: A controlling device for conversion of DC power to sine wave AC power, including a boosting circuit, a sine wave generating circuit, a PWM wave generating circuit, a drive module, an MOSFET output circuit, a filter circuit, a protection circuit and a feedback circuit. The MOSFET output circuit outputs PWM wave by all-bridge type, whereby the safety in operation of the circuit is ensured and sine wave AC current is output.

Abstract: A multifunctional health massage device includes a fixing frame enclosed within an elastic material, and an oscillating device installed on the frame. A control switch is installed on a panel situated on said elastic material, the control switch being arranged to switch between an audio control mode in which a strength of oscillations of said massager is controlled by an audio signal input through an audio input jack, and an internal signal control mode in which the oscillating device is caused to oscillate in response to an internal fixed or variable internal signal source. The control panel is removable to enable remote control of the massager when used to massage a user's back or other inaccessible body part, and an audio output jack is provided so that the user can listen to music while using the device.