Abstract: A voltmeter of the present disclosure includes a multimeter, a first option switch, a second option switch, a control module, an adjusting power source and a button. The multimeter has a positive probe and a negative probe. The first option switch has two binding posts S1, S2, and a connection pin T1. The second option switch also has two binding posts S3, S4 and a connection pin T2. The positive probe of the multimeter is coupled with the connection pin T1 of the first option switch, the negative probe of the multimeter is coupled with the connection pin T2 of the second option switch. The control module can control the first option switch and the second option switch, and read a value of the multimeter, the multimeter and test a voltage of a circuit by the adjusting power source being equivalent to the voltage of the circuit.

Abstract: A lockable storage device includes a main body defining a connector; and a locking mechanism including a stopping member and a driving plate assembly. The connector defines a receiving space for receiving a port, the stopping member is movable in the receiving space. The driving plate assembly includes a number of driving plates marked with numbers. When a combination of numbers, formed by surfaces which are on a same plane, is different from a predetermined number sequence, the storage device is locked, when the combination of numbers formed by the surfaces is the same as the predetermined number sequence, the storage device is unlocked.

Abstract: A self-image capturing method includes a user activating a capturing device, controlling a light detecting device to detect ambient light intensity around an electronic device, determining whether the light intensity detected by the light detecting device is less than a predetermined value, activating the infrared capturing device when determining that the light intensity detected by the light detecting device is less than the predetermined value, controlling the capturing device to capture a selfie image of the user in response to an operation from the user, controlling the infrared capturing device to capture an infrared selfie image, and synthesizing the two captured images into a single selfie image.

Abstract: A voice filtering system for controlling an electronic device includes a first storage unit, a voice acquiring unit, a voice analyzing unit, a voice determining unit, and a voice filtering unit. The first storage unit stores at least one first voice and the voice acquiring unit acquires a second voice. The voice analyzing unit analyzes sonic features of the first voice and the second voice and the determining unit detects and determines any differences in the sonic features between the first voice or voices and the second voice. The voice filtering unit filters out any such different features found. A voice filtering method is also presented.

Abstract: A voltmeter of the present disclosure includes a multimeter, a first option switch, a second option switch, a control module, an adjusting power source and a button. The multimeter has a positive probe and a negative probe. The first option switch has two binding posts S1, S2, and a connection pin T1. The second option switch also has two binding posts S3, S4 and a connection pin T2. The positive probe of the multimeter is coupled with the connection pin T1 of the first option switch, the negative probe of the multimeter is coupled with the connection pin T2 of the second option switch. The control module can control the first option switch and the second option switch, and read a value of the multimeter, the multimeter and test a voltage of a circuit by the adjusting power source being equivalent to the voltage of the circuit.

Abstract: A circuit removing static electricity from a connected electronic device includes a detecting device, an amplifier, a switch device, and a control device. The detecting device detects a change of a magnetic flux surrounding the electronic device, and generates an analog electronic signal accordingly. The amplifier connects to the detecting device and amplifies the analog electronic signal. The control device connects to the amplifier, filters an amplified analog electronic signal, and generates a control signal. The switch device connected to the control device as well as the electronic device conducts the static electricity to earth in response to the control signal.

Abstract: A lockable storage device includes a main body defining a connector; and a locking mechanism including a stopping member and a driving plate assembly. The connector defines a receiving space for receiving a port, the stopping member is movable in the receiving space. The driving plate assembly includes a number of driving plates marked with numbers. When a combination of numbers, formed by surfaces which are on a same plane, is different from a predetermined number sequence, the storage device is locked, when the combination of numbers formed by the surfaces is the same as the predetermined number sequence, the storage device is unlocked.

Abstract: A self-image capturing method includes a user activating a capturing device, controlling a light detecting device to detect ambient light intensity around an electronic device, determining whether the light intensity detected by the light detecting device is less than a predetermined value, activating the infrared capturing device when determining that the light intensity detected by the light detecting device is less than the predetermined value, controlling the capturing device to capture a selfie image of the user in response to an operation from the user, controlling the infrared capturing device to capture an infrared selfie image, and synthesizing the two captured images into a single selfie image.

Abstract: A method for controlling an electronic device to sleep because of user inaction includes checking whether the electronic device is playing streaming media, and detecting distance between the electronic device and a user who is using the electronic device in real time when the electronic device is playing streaming media. Method determines whether the detected distances change in a first predetermined time period, and controls the electronic device to sleep when determining that the detected distances in the first predetermined time period are the same.

Abstract: A circuit removing static electricity from a connected electronic device includes a detecting device, an amplifier, a switch device, and a control device. The detecting device detects a change of a magnetic flux surrounding the electronic device, and generates an analog electronic signal accordingly. The amplifier connects to the detecting device and amplifies the analog electronic signal. The control device connects to the amplifier, filters an amplified analog electronic signal, and generates a control signal. The switch device connected to the control device as well as the electronic device conducts the static electricity to earth in response to the control signal.

Abstract: A three terminal battery includes a first positive electrode, a first negative electrode, a second positive electrode, a second negative electrode connected to the first negative electrode, a first terminal, a second terminal, and a third terminal. The first positive electrode is connected to the first terminal. The second positive electrode is connected to the second terminal. The first negative electrode and the second negative electrode are connected to the third terminal.

Abstract: A video playing system includes a support, a screen mask, and a projecting device set on the support. The support includes a pair of rotating fasteners correspondingly set at two opposite sides of the support. The screen mask is rotatably connected to the rotating fasteners and covers a part of the support. The screen mask includes a inner projecting surface. The projecting device projects video onto the inner projecting surface.

Abstract: A testing circuit for testing proper connections between pins and corresponding circuits within an integrated circuit includes a pin selection module. The pin selection module includes a plurality of input pins, an output pin, and a control pin. The pin selection module selectively connects one of the input pins to the output pin based upon a control signal from the control pin. A voltage-dividing module includes an input end to receive a test voltage, an output end connected with the output pin of the pin selection module, and a voltage-dividing element connected between the input end and the output end. A determination module receives an output voltage from the output end, and determines whether the voltage of the output end falls into one of several predetermined voltage ranges, and outputs a result accordingly.

Abstract: A method for protecting a touch-sensitive device includes: switching the touch-sensitive device from a normal mode to a protection mode when a preset operation is exerted; determining whether a touch operation is exerted after the touch-sensitive device enters the protection mode, and further determine whether a duration of the touch-sensitive device in the protection mode exceeds a preset time interval; comparing a touch size of the touch operation with a preset size when the duration of the touch-sensitive device in the protection mode exceeds the preset time interval; and generating an alarm signal when the touch size is less than the preset size. A related touch-sensitive device is also provided.

Abstract: An electronic device includes a sound collecting unit and a processor. The processor determine whether continuous sound signals collected by the sound collecting unit includes a first alternating portion, a direct portion, and a second alternating portion in sequence. The processor further determines whether a first duration of the direction signals portion falls within a first preset time range, and determines whether a second duration of each of the first alternating portion and the second alternating portion falls within a second preset time range. The processor then triggers a function of the electronic device when the first duration falls within the first preset time range, and the second duration falls within the second preset time range. A related method is also disclosed.

Abstract: A battery simulation circuit simulates a rechargeable battery. The battery simulation circuit includes an integrated amplifier, a voltage adjustment unit, a current limitation unit, and a feedback unit. The voltage adjustment unit provides a reference voltage for the integrated amplifier; the current limitation unit provides a reference current for the integrated amplifier and the feedback unit provides a negative feedback signal for the integrated amplifier to control the integrated amplifier working in a linear state. The integrated amplifier outputs an output signal according to the reference voltage and the reference current; the battery simulation circuit supplies power for an electronic device. When the output terminal is connected to a DC power source and a voltage of the DC power source is greater than the output voltage of the output terminal, the battery simulation circuit simulates a battery being recharged by the DC power source via the output terminal.

Abstract: A sensing circuit includes a plurality of sensors, a controller, a multiway switch, a linear optocoupler, and a logical control unit. The plurality of sensors are capable of measuring physical quantity, and each of the plurality of sensors is capable of generating a sensing signal in accordance with the physical quantity. The controller is capable of receiving and analyzing the sensing signals, and transforming the sensing signals into sensing events. The multiway switch is capable of selectively connecting one of the plurality of sensors to the controller. The linear optocoupler is connected between the plurality of sensors and the controller. The logical control unit is capable of controlling the multiway switch to selectively connect one of the plurality of sensors to the optocoupler, and generating a control signal to the controller, wherein the control signal indicating the one of the plurality of sensors connected to the controller.

Abstract: An assay device capable of assaying purity of a substance in an object includes a memory, an emitter, a receiver, a processing unit, and a display device. The memory stores names and standard densities of a number of substances. The emitter emits rays at the object. The receiver receives the rays reflected by the object. The processing unit calculates density of the object according to intensity of the emitted rays and intensity of the reflected rays. The processing unit further calculates purity of a selected substance in the object according to the density of the object and standard density of the selected substance stored in the memory, and outputs the calculated purity to the display device.

Abstract: An electronic glove communicates with an electronic device and has a positioning unit, a microcontroller, and an indicating component. The indicating component may be a heating component or a visual indicating component. The positioning unit detects coordinates of the electronic glove and the electronic device sends its own coordinates wirelessly to the electronic glove. The microcontroller calculates a distance between the electronic device and the electronic glove. The microcontroller controls the indicating component to generate different signals (of either heat or light) according to any change in the distance, to guide a user to move towards the precise location of the electronic device.

Abstract: The present disclosure provides an automatic positioning system that is in a mobile device. The mobile device communicates with a vehicle. The system includes a first detection module, a second detection module and a positioning module. The first detection module detects the mobile device is in a moving state or a static state in real-time. The second detection module detects the vehicle is in a moving state or a static state in real-time. The positioning module acquires the location of the mobile device and records the acquired location as a position where the vehicle is parked in the mobile device, when the vehicle changes from the moving state to the static state, the mobile device changes from the static state to the moving state.