Abstract: A voltage limiting test system used to test limit voltage values of a memory includes a voltage limiting test device and an assistant test device connected to the voltage limiting test device. The voltage limiting test device includes a button to adjust a voltage of the memory. The assistant test device includes a first timer, and first and second relays. The first relay is used to receive a state signal of the motherboard, to determine whether the first timer is powered according to the state signal. The second relay is used to receive the pulse signal output by the first timer when the first timer is powered, to trigger the button to adjust the voltage of the memory per a reference time. When the motherboard stops working, the voltage value of the memory is a limit voltage value of the memory.

Abstract: A signal testing device includes an oscillograph having a plurality of first connection ports, and a signal transmitting cable. The signal transmitting cable includes a plurality of second connection ports, a plurality of coaxial cables and a SAS connector configured for connecting to a mother board. One end of each coaxial cable is electrically connected to a corresponding one of the second connection ports, and the other end is electrically connected to the SAS connector. The first connection ports are configured for engaging with the second connection ports.

Abstract: A reversing transmission includes a shaft, a retainer, a spacing collar, reversing members, two gears and two covers. The holder is sleeved on the shaft with spaced sliding notches formed thereon. The spacing collar is mounted on an outer surface of the retainer. The reversing members each include two spaced swing plates, with two reversed spiral teeth dented on two diagonal half surfaces of the two spaced swing plates. The reversing members slide into the sliding notches of the holder, with the two swing plates of each reversing member distributed at different sides of the spacing collar. Each of the gears has a group of spiral teeth formed on the inner side for engaging with the group of spiral teeth of the reversing members, and cogs formed on the outer circumference surface. The covers are mounted on two opposite ends of the holder to keep the reversing members in position.

Abstract: A bearing includes a main body, a plurality of first magnetic members, a plurality of second magnetic members, and a plurality of friction members. The main body defines a pivot hole, and a plurality of first receiving portions and a plurality of second receiving portions around the pivot hole. Each of the second receiving portions defines a cutout. The first magnetic members are received in the first receiving portions. The second magnetic members together with the friction members are received in the second receiving portions, thus generating a repelling force between the first magnetic members and the second magnetic members to impel the friction members to partially extend out of the cutouts.

Abstract: A voltage limiting test system used to test limit voltage values of a memory includes a voltage limiting test device and an assistant test device connected to the voltage limiting test device. The voltage limiting test device includes a button to adjust a voltage of the memory. The assistant test device includes a first timer, and first and second relays. The first relay is used to receive a state signal of the motherboard, to determine whether the first timer is powered according to the state signal. The second relay is used to receive the pulse signal output by the first timer when the first timer is powered, to trigger the button to adjust the voltage of the memory per a reference time. When the motherboard stops working, the voltage value of the memory is a limit voltage value of the memory.

Abstract: A signal testing device includes an oscillograph having a plurality of first connection ports, and a signal transmitting cable. The signal transmitting cable includes a plurality of second connection ports, a plurality of coaxial cables and a SAS connector configured for connecting to a mother board. One end of each coaxial cable is electrically connected to a corresponding one of the second connection ports, and the other end is electrically connected to the SAS connector. The first connection ports are configured for engaging with the second connection ports.

Abstract: A bearing includes a main body, a plurality of first magnetic members, a plurality of second magnetic members, and a plurality of friction members. The main body defines a pivot hole, and a plurality of first receiving portions and a plurality of second receiving portions around the pivot hole. Each of the second receiving portions defines a cutout. The first magnetic members are received in the first receiving portions. The second magnetic members together with the friction members are received in the second receiving portions, thus generating a repelling force between the first magnetic members and the second magnetic members to impel the friction members to partially extend out of the cutouts.

Abstract: An electronic device with anti-theft protection includes an alarm unit, a mercury connector, and a microprocessor connected therebetween. The mercury connector includes a body containing mercury, and first and second leads arranged on the body. The microprocessor includes a first signal terminal and a second signal terminal. The first signal terminal is connected to the first lead. The second signal terminal is connected to the second lead. When the microprocessor has entered the anti-theft mode, if the electronic device is moved, the first lead connects to the second lead via the mercury and forms a circuit path from the first signal terminal to the second signal terminal. The microprocessor starts the alarm unit to generate an alarm.

Abstract: The REVERSING TRANSMISSION includes a shaft, a retainer, a spacing collar, a plurality of reversing members, two gears and two covers. The holder is sleeved on the shaft with spaced sliding notches formed thereon. The spacing collar is mounted on an outer surface of the retainer. The reversing members each includes two spaced swing plates with two reversed spiral teeth dented on two diagonal half surfaces of the two spaced swing plate. The reversing members slide into the sliding notches of the holder with two swing plates distributed at different side of the spacing collar. Each of the gears has a group of spiral teeth formed on the inner side for engaging with the group of spiral teeth of the reversing members, and cogs formed on the outer circumference surface. The covers are mounted on two opposite ends of the holder to keep the reversing member in position.

Abstract: A system for analyzing non-monotonic of signals is provided. The system is configured for receiving a signal and displaying changes of the signal using a waveform curve. The system is configured for analyzing data of the signals and the waveform curve in order to locate peak points on the waveform curve. The system is also configured for storing the signal data and data generated during the analyzing process. A related method is also provided.

Abstract: A signal measurement method includes receiving a signal from a signal generating module; displaying a wave of the signal; reading a reference parameter of the signal, and adjusting the wave according to the reference parameter; measuring the signal according to the wave after adjustment; and displaying the measurement result.

Abstract: A signal decoding system includes a signal acquisition unit, and a decoding unit including a segmenting module and a decoding module; the signal acquisition unit is configured for receiving a data waveform and a clock waveform outputted from one or more electronic devices; the segmenting module is configured for dividing the data waveform and the clock waveform into segments; and the decoding module is configured for decoding each segmented data waveform.

Abstract: A system for measuring a signal waveform is provided. The system comprises a parameter receiving module, a waveform receiving module, a waveform filter, and a data storing module. The parameter receiving module is configured for receiving one or more filtration conditions. The waveform receiving module is configured for receiving the signal waveform. The waveform filter is configured for filtering the signal waveform to obtain a desired waveform. The data storing module is configured for storing the desired waveform into a storage device.

Abstract: A system for analyzing non-monotonic of signals is provided. The system is configured for receiving a signal and displaying changes of the signal using a waveform curve. The system is configured for analyzing data of the signals and the waveform curve in order to locate peak points on the waveform curve. The system is also configured for storing the signal data and data generated during the analyzing process. A related method is also provided.