Abstract: An adjustable mounting assembly includes a lampshade member having a major wall that extend in a longitudinal direction and that forms a storing space in cooperation with a base plate disposed above the lampshade member and fixed on a wall structure. The major wall of the lampshade member defines a guiding slot therethrough in communication with the storing space such that two end seats for holding a fluorescent tube can be mounted on the major wall by inserting two fastener members through the end seats and the guiding slot for fastening on the base plate.

Abstract: The present invention provides a speed control device for a ceiling fan which comprises a MOSFET, a signal generator and an overload protector. The MOSFET is connected to the ceiling fan and power source via a bridge rectifier for controlling power supplied to said ceiling fan. The signal generator provides a control signal to the MOSFET, wherein the control signal is a cyclic signal whose voltage level is progressively increased and then decreased when it reaches a predetermined level whereby the MOSFET is cyclically and progressively turned on and turned off. The overload protector is connected between the drain and gate of said MOSFET for detecting an abnormally large current flow through said MOSFET to cut off said MOSFET thereby preventing the ceiling fan from possible damage.

Abstract: Disclosed is a power supplying circuit for a ceiling fan including a protecting unit, a power supplying unit and a rectifying unit. An operation of the power supplying circuit is divided into four cases which are a negative half cycle loop, a positive half cycle loop, a control loop and a protection loop. Using this power supplying circuit, a stable DC voltage output can be achieved for both a control purpose and a detection purpose when a load being in a series connection with the power supplying circuit varies from a low load to a high load.