摘要:
The present disclosure provides a battery charging control circuit. The charging control circuit includes: a constant-current charging unit and a trickle charging unit. The charging control circuit further includes a branch switch, a control unit, and a detection unit. The branch switch is connected between a power source and the rechargeable battery for enabling or disabling the constant-current charging unit. The control unit is between the constant-current charging unit and the branch switch for controlling the branch switch. The detection unit is used to detect a state of the rechargeable battery. If the detection unit detects the state of the rechargeable battery is correspond to a predetermined state, then the control unit controls the branch switch to disable the constant-current charging unit and enable the trickle charging unit.
摘要:
A computer system includes a screen for displaying images, a central processing unit (CPU) for controlling the operation of the computer system, an on-screen display (OSD) circuit electrically connected to the CPU and the screen for controlling the screen to display a plurality of test marks according to a plurality of predetermined coordinate values, a touch panel installed parallel to the display face of the screen for generating a plurality of test sensing signals according to positions at which it is triggered, and a control circuit electrically connected to the touch panel and the CPU for calibrating the coordinate values converted by the control circuit from the sensing signals generated by triggering the touch panel, according to the plurality of predetermined coordinate values and the plurality of test sensing signals.
摘要:
A capacitive touch switch and control device is provided. The capacitive touch switch and control device in one embodiment includes one or more capacitive sensor elements, one or more resistors, a capacitor, a capacitance/frequency converter, and an antenna including a positive branch and a negative branch. The positive branch and the negative branch synchronously and correspondingly receive a pair of signals from the microprocessor, the pair of signals each undergoing a 180 degree phase shift relative to the other, for shielding the noise acted on the capacitive sensor elements. When any of the capacitive sensor elements is touched, the capacitance/frequency converter outputs a frequency signal to the microprocessor, the microprocessor outputs a control signal that corresponds to the frequency signal to an electronic device to trigger corresponding operations of the electronic device.
摘要:
A multi purpose switching circuit is provided. The multi purpose switching circuit is connected with a main unit (60) of an electronic apparatus and includes a multi purpose switch (10). The multi purpose switch is capable of receiving multiple manual operational inputs and accordingly producing multiple command signals. The multiple manual operational inputs are identified by a pushing time and a pushing count in a predetermined time of the multi purpose switch. The multiple command signals initiate the main unit to implement multiple functions such as starting up, shutting down and resetting itself. An electronic device including such a multi purpose switching circuit is also provided.
摘要:
A mouse interface converter is provided, which allows a mouse to be connectable to a computer system, such as a personal computer (PC), installed with either an RS-232 serial port or a PS/2 port. This mouse interface converter allows the mouse to be connected directly to PS/2 port and via an adapter to RS-232 serial port. The mouse interface converter includes a mode-detection circuit for detecting which type of port the mouse is currently being connected. The mode-detection circuit can generate a mode-indicating signal indicative of the type of the currently connected port, which is then used to set a control circuit to convert the mouse data to the corresponding format. The mouse interface converter further includes a driving circuit that allows the mouse to be more compatible with various signals of either the PS/2 port or the RS-232 serial port. This feature allows the mouse to be considerably reduced in power consumption that allows the mouse to be suitable for use on notebook computers.