Abstract: A control circuit is electrically connected to at least one fan device. The fan device has a motor and generates a sensing signal. The control circuit receives a power-source signal and the sensing signal and includes a power converting unit, a control unit and a switch unit. The power converting unit receives the power-source signal and thus respectively outputs a first power-source signal and a second power-source signal according to the power-source signal. The control unit receives the first power-source signal and the sensing signal and thus generates a control signal according to the sensing signal. The switch unit receives the control signal and generates at least one switch signal according to the control signal. The fan device receives the second power-source signal and the switch signal and drives the motor according to the switch signal.

Abstract: Full functional integration of six components: 1) a main electronic door viewer unit; 2) a wireless infrared outdoor detection system (detection and radio wave transmission unit from outdoor source); 3) a receiving unit attachment; 4) a re-transmission unit attachment; 5) a wireless alarm control unit; and 6) a control system to turn on any pre-set electrical appliances, remotely operable by devices (e.g. cellular phone). Integration achieved via wireless, radio wave, solar, and electronic technologies. Main body of the invention is the main electronic door viewer unit. The battery unit, receiving unit, transmission unit, and plugs for wire connectors are detachable/attachable by sliding tracks therein. Main body is installed on the door with the camera lens focused on the external scene, and the image display screen facing inwards for viewing purposes. Components 2-6 communicate with the main body upon visitor arriving on property and/or at the door, triggering pre-set alerts.

Abstract: A control circuit of a motor includes at least two sensor chips and at least two winding sets. The sensor chips are electrically connected to each other, and each of the winding sets has a first winding and a second winding. The first end of the first windings and the first end of the second windings are electrically connected to each other, and the second end of the first windings and the second end of the second windings are electrically connected to the sensor chips correspondingly. In addition, a motor having the control circuit is also disclosed.

Abstract: A heat dissipating system includes a fan set and a monitoring module. The fan set has at least one fan. The monitoring module has at least one sensing unit, a controlling unit and a setting unit. The setting unit sets a plurality of parameter values. The controlling unit controls a rotation speed of the fan according to the parameter values and/or at least one measured value sensed by the sensing unit.

Abstract: A control circuit is electrically connected to at least one fan device. The fan device has a motor and generates a sensing signal. The control circuit receives a power-source signal and the sensing signal and includes a power converting unit, a control unit and a switch unit. The power converting unit receives the power-source signal and thus respectively outputs a first power-source signal and a second power-source signal according to the power-source signal. The control unit receives the first power-source signal and the sensing signal and thus generates a control signal according to the sensing signal. The switch unit receives the control signal and generates at least one switch signal according to the control signal. The fan device receives the second power-source signal and the switch signal and drives the motor according to the switch signal.

Abstract: A control circuit of a motor includes at least two sensor chips and at least two winding sets. The sensor chips are electrically connected to each other, and each of the winding sets has a first winding and a second winding. The first end of the first windings and the first end of the second windings are electrically connected to each other, and the second end of the first windings and the second end of the second windings are electrically connected to the sensor chips correspondingly. In addition, a motor having the control circuit is also disclosed.