Abstract: The present invention discloses a water quality monitoring device and system. By revealing at least a part of a tube above the water surface, water quality data detected below the water surface is transmitted. The water quality monitoring device sequentially includes, from top to bottom, an upper tube, a first connecting member and a middle tube. The water quality monitoring device appearing slightly long tubular further consists of a signal transceiving module in the upper tube, a monitor in the middle tube, and a sensing portion protruding out of the middle tube. A water quality monitoring system can further be formed by connecting a plurality of water quality monitoring devices to a network to monitor water quality conditions at a remote end, thereby monitoring water quality conditions in real time.

Abstract: A power control system for car computer includes a power switching circuit located between a power input terminal of a computer host and an external power source, such that the computer host outputs a keep-power-on signal when a key power is supplied thereto; a power ON/OFF circuit receiving the keep-power-on signal to thereby connect the external power source to the computer host; a key power detection circuit for constantly detecting whether the key power is ON, so that the computer host outputs a shut-down signal when the key power is OFF; a computer shut-down circuit for receiving the shut-down signal from the computer host and thereby driving the computer host to execute shut-down procedures; and a power OFF circuit for sensing an OFF state of the key power and outputting a control signal to drive the power ON/OFF circuit to disconnect the external power source from the computer host.

Abstract: A coupling structure for microcomputer cases includes at least two microcomputer cases and at least two coupling units for coupling the two cases together. Each of the cases is provided along four longitudinal outer corners with a slide channel each. The coupling units each include a longitudinally extended body portion and two insertion ribs separately extended along and from two longitudinal sides of the body portion. The insertion ribs are configured corresponding to the slide channels on the cases to be slidably fitted in the slide channels on two adjoining sides of the two cases that are juxtaposed or stacked, so as to firmly couple the two cases together.

Abstract: A heat-radiating microcomputer case includes a base having a bottom wall and two upright side walls, a top cover having a plurality of radiating fins formed on a top surface thereof, and a system unit located below a bottom surface of the top cover. Each of the two upright side walls of the base has a free edge with an insertion channel formed along an outer corner thereof. The top cover has two downward extended insertion sections slidably fitted in the insertion channels on the base to detachably assemble to the base. The system unit includes a circuit board having a heat-producing electronic element arranged on an upper side thereof to contact with the bottom surface of the top cover, so that heat produced by the electronic element may be transferred to the large-area top cover and dissipated into ambient air quickly.

Abstract: A microcomputer case includes a base and a top cover detachably assembled to a top of the base. The base includes a bottom wall and two upright side walls perpendicularly upward extended from two lateral edges of the bottom wall. Each of the two upright side walls is formed along an outer corner of a free edge with an insertion channel. The top cover is provided along two lower lateral edges with two downward extended insertion ribs corresponding to the insertion channels on the base. The insertion ribs of the top cover are slidably fitted in the insertion channels of the base, enabling the microcomputer case to be easily disassembled and reassembled for carrying out the expansion of internal and external hardware thereof.

Abstract: An expansion structure for microcomputer includes a case having two end panels; a motherboard being installed in the case and provided with at least a connection port, a central processing unit, a plurality of electronic elements, a storage unit, and a plurality of push keys and external peripheral device connectors accessible at the end panels of the case; an adaptation connector arranged on the motherboard and electrically connected to the connection port, and the adaptation connector having a socket located on one of the end panels of the case; and an expansion interface card having an I/O connector provided along an edge thereof for plugging in the connection port on the motherboard. Desired external peripheral devices may be connected to the adaptation connector and/or the expansion interface card to conveniently achieve the expansion of the functionality of a microcomputer.

Abstract: A waterproofing structure for microcomputer includes a computer case being formed on outer surfaces with radiating fins, and having at least one end panel, on which a plurality of through holes are formed; a motherboard mounted in the computer case and having a CPU, electronic elements, and a storage unit mounted thereon, the motherboard also having a plurality of keys and connectors provided thereon corresponding to the through holes formed on the end panel of the computer case; and a plurality of waterproofing units separately fixedly mounted to the through holes on the end panel of the computer case for enclosing the plurality of keys and connectors therein, and each of the waterproofing units having an end fixedly located at an outer side of the panel with a cap removably mounted thereto. Therefore, the microcomputer is waterproof and usable on ship or under water, and has good heat radiating effect.

Abstract: A heat dissipating structure of a microcomputer includes a retaining board; a heat dissipating unit installed on the retaining board and having at least one heat conducting portion disposed on a side of the retaining board and a heat dissipating fin module installed between the heat conducting portions and having a plurality of passage portions; and an air guide unit being a cross flow fan and having an air outlet corresponding to the passage portion of the heat dissipating fin module, such that the heat dissipating structure can be applied in a microcomputer for dissipating a heat source rapidly by the heat dissipating unit in conformity with the air guide unit, so to achieve a better heat dissipating effect

Abstract: An improved storage device fixing structure of a microcomputer includes a casing; a motherboard installed in the casing, a central processing unit, a plurality of electronic components, a plurality of press key portions, a connector disposed on a side of the motherboard, and a plurality of through holes disposed at appropriate positions of the motherboard; a fixing unit installed on the motherboard and connected to each through hole; and a storage unit fixed onto the fixing unit, such that the storage unit can be installed on the motherboard by the fixing unit to achieve the easy-to-install, easy-to-remove and secured connection effects.

Abstract: A power control system for car computer includes a power switching circuit located between a power input terminal of a computer host and an external power source, such that the computer host outputs a keep-power-on signal when a key power is supplied thereto; a power ON/OFF circuit receiving the keep-power-on signal to thereby connect the external power source to the computer host; a key power detection circuit for constantly detecting whether the key power is ON, so that the computer host outputs a shut-down signal when the key power is OFF; a computer shut-down circuit for receiving the shut-down signal from the computer host and thereby driving the computer host to execute shut-down procedures; and a power OFF circuit for sensing an OFF state of the key power and outputting a control signal to drive the power ON/OFF circuit to disconnect the external power source from the computer host.

Abstract: An automatic heating unit for personal computer includes an instruction save circuit that receives a turn-on signal from a power switch of the personal computer (PC) to thereby drive a temperature sensing circuit to sense an ambient temperature inside the PC. When it senses the ambient temperature is too low to allow normal computer booting, the temperature sensing circuit outputs a heating signal to drive a heating circuit to heat an interior of the PC. Otherwise, the temperature sensing circuit outputs a booting signal to enable a booting circuit to supply power to a mainboard of the PC.