Abstract: A switch control circuit to switch off communication channels between a baseboard management controller (BMC) and a backplane chip when not needed includes a logic component and a switch circuit. The switch circuit is configured for coupling between the BMC and the backplane chip in a device. The logic component obtains a logic control signal from the BMC, and outputs a switch signal to the switch circuit to turn on or turn off the switch circuit according to the logic control signal. An electronic device including the switch control circuit is also provided.

Abstract: An air guiding duct and casing providing easy access for fan maintenance and electronic devices using the air guiding duct are disclosed. The air guiding duct includes a first guiding plate and a second guiding plate. The first guiding plate includes a first pivoting portion and first extension panels. The second guiding plate includes a second pivoting portion and second extension panels. The first guiding plate is rotatably connected to the second guiding plate, and can be in a first position to align with the second guiding plate and join each first extension panel with a second extension panel, to define air guiding channels for heat dissipation, and a second position, where the first guiding plate is tilted with a predetermined angle relative to the second guiding plate.

Abstract: A system for calculating a distance travelled by a warning device moving towards a required location includes an obtaining module, a first calculating module, a counting module, and a second calculating module. The number of pulses required to turn a motor through one revolution is obtained, and the first calculating module calculates a moving distance of the device per pulse according to the number of pulses and an outer diameter of a wheel. The counting module counts a total pulses issued as the warning device moves from start to finish of a movement. The second calculating module calculates a first moving distance of the warning device according to the total pulses and the distance moved per pulse, also applying rearward image-taking of an object at start and finish of a movement, to confirm calculations. A distance sensing method of the warning device is also provided.

Abstract: A data storage device securing mechanism to secure at least one data storage device on a board includes a bottom plate, two side plates connected with two sides of the bottom plate, and a plurality of resilient members mounted on each side plate. Each side plate defines a plurality of receiving grooves, a plurality of fasteners is configured to pass through the receiving grooves to be inserted into the data storage device to install the data storage device slidably in the securing mechanism. The resilient member is elastically deformed to abut against the fasteners to prevent the fasteners and the data storage from sliding along the receiving groove.

Abstract: A server rack able to maintain electrical connections to its components during replacements includes a shell and brackets for data storage devices. The data storage devices are electrically connected to the bracket. The shell includes a power supply module and a connecting device electrically connected to the power supply module. The connecting device includes a resilient ring and a cable, one end of the cable is secured on the resilient ring, and the other end of the cable is electrically connected to the bracket. When the bracket is slid in the shell, the resilient ring elastically deforms to release cable or take back the slack cable, to maintain the electrical connections at all times.

Abstract: An electrical socket with a security fixing includes a base and a number of terminal portions. The base includes an inserting side. The inserting side defines a number of receiving grooves. The terminal portions are fixed in the receiving grooves to conduct electricity to a plug. Two clamping members are protruded from the inserting side and when the plug is inserted into the terminal portion, the two clamping members latch onto the plug to hold it in place.

Abstract: A system for controlling a traffic warning triangle to avoid obstacles when moving towards a placement location includes a depth calculating module, a determining module, and a control module. The traffic warning triangle includes a binocular camera to capture real-time images of a path or road in front of the triangle. The depth calculating module compares and analyzes first and second images, captured at the same time, to calculate depth information between the binocular camera and an obstacle. The determining module determines whether the depth information is less than a threshold value. The control module adjusts a moving direction of the mobile warning triangle to avoid the obstacle in response to the depth information being less than the threshold value, according to a process. An obstacle avoidance method of the mobile warning triangle is also provided.

Abstract: A vibration-proof mounting apparatus device is provided for mounting a memory card. The main mounting apparatus comprises a mounting member, a windshield, and an elastic element. The elastic element connects the mounting member and the windshield. The windshield drives the mounting member to move. The windshield presses down against the mounting member and securely holds the memory card for correct connectivity at all times.