Abstract: A solar controller includes a microcontroller and a radio controlled clock receiving a time signal from a radio station and being synchronized to the time signal. The microcontroller is configured to store time-related data provided by the radio controlled clock.

Abstract: A projector includes a projector body, a lens module with a lens, and a gear module. The lens module and the gear module are arranged in the projector body. The gear module is operable to adjust a height of the lens and keep an angle of the lens, in response to the gear module being rotated.

Abstract: A projector includes an image signal interface, a micro control unit (MCU), an image output lens, a graphic processing unit (GPU), an image input lens, and an image sensor. The MCU receives image signals through the image signal interface and sets the image signals to a default image parameter configuration. The GPU processes the set image signals to project the set image signals in a configuration of an image on a certain place through the image output lens. The image input lens captures the projected image on an appropriate place. The MCU receives actual image data corresponding to the captured projected image through the image sensor. The MCU compares the actual image data with predetermined image data, and adjusts image parameters of the image signals until a difference between the actual image data and the predetermined data is equal to or less than a predetermined value.

Abstract: A projector includes a projector body, a lens module with a lens, and a gear module. The lens module and the gear module are arranged in the projector body. The gear module is operable to adjust a height of the lens and keep an angle of the lens, in response to the gear module being rotated.