Hon Hai Precision Industry Co., Ltd.

Hong-fu Jin Precision Industry (shenzhen) Co., Ltd.

Jian-Chun Pan

Hai-Qing Zhou

Chung-Chi Huang

Yi-Xin Tu

De-Jun Zeng

Guang-Dong Yuan

Wei-Min Zhang

Guo-Yi Chen

Han-Bing Zhang

A test device for testing a printed circuit board (PCB) includes a base and a measuring device. The measuring device includes a testing pin and is capable of measuring any desired point of the PCB on condition that the pin makes contact with the point at an included angle between the pin and a back surface of the PCB which is larger than a predetermined angle. The distance between the base and the PCB satisfies: H&#x3e;L tan &#x3b8;, where H is the vertical distance between the PCB and the base, L is the maximum length of an orthogonal projection of the pin on the PCB when the pin is contacting the point, and &#x3b8; is the predetermined angle.

Test device for printed circuit board

A jumper assembly includes a circuit board, a first base, a second base, and a jumper. The first base and the second base are mounted on the circuit board. The first base includes a first pin electrically connected to the circuit board. The second base includes a second pin electrically connected to the circuit board. The second pin includes a limiting portion formed at a top. The jumper defines two through holes each receiving a conductive portion. The conductive portions of the jumper are electrically connected to each other. The jumper is set around the first pin and the second pin to electrically connect the first pin to the second pin. The limiting portion can prevent the second pin from disengaging from the jumper when response to the first pin is disengaged from the jumper.

Jumper assembly

An audio test cable includes three types of audio input and output (I/O) ports. The input port and the output port in each type of audio I/O ports form a short circuit for carrying a loopback test for a motherboard. The audio test cable also includes a test audio jack which connects to the output port of all types of audio I/O ports for carrying out an audio-quality test for the motherboard.

Audio test cable

A BIOS refresh device includes a first socket, a second socket, and a jumper. The first socket includes a first elastic contact, a first voltage contact, and a first ground contact. The second socket includes a second elastic contact, a second voltage contact, and a second ground contact. The jumper includes a first pin, a second pin, a third pin, and a fourth pin. The first pin is electronically connected with the second elastic contact. The second pin is electronically connected with the first voltage contact or the second voltage contact. The third pin is electronically connected with the first elastic contact. The fourth pin is electronically connected with the second ground contact or the second ground contact.

Bios refresh device and method using the same

A video graphics array (VGA) interface switch apparatus includes first to third VGA interfaces, a single-pole double-throw (SPDT) switch, a switch control chip, and first to sixth electronic switches. The first VGA interface is connected to the second and third VGA interfaces through the switch control chip and the electronic switches. The SPDT switch is used to control the first VGA interface to be selectively connected to the second or third VGA interface.

Video graphics array interface switch apparatus

A flash drive includes a frame and a main body. A receiving portion defining a receiving space therein is formed on an end of the frame. Two arms extend from opposite ends of the receiving portion. A universal serial bus (USB) connector is formed on an end of the main body. The main body is slidably and pivotably installed between the arms. The main body is operable to slide toward the receiving portion to insert the USB connector into the receiving space. And when the USB connector is received in the receiving space, the main body is operable to slide away from the receiving portion, to move the USB connector out from the receiving space, and the main body is then pivotable relative to the arms.

Flash drive

A switch apparatus includes first to third video graphics array (VGA) interfaces, first to sixth universal serial bus (USB) interfaces, a single-pole double-throw (SPDT) switch, and first to eighteenth electronic switches. The first VGA interface is connected to the second and third VGA interfaces through the electronic switches. The first USB interface is connected the second and third USB interfaces through the electronic switches. The fourth USB interface is connected to the fifth and sixth USB interfaces through the electronic switches. The SPDT switch is used to control the first VGA interface to be selectively connected to the second or third VGA interface, and control the first USB interface to be selectively connected to the second or third USB interface, and control the fourth USB interface to be selectively connected to the fifth or sixth USB interface.

Switch apparatus for switching display, keyboard, and mouse

A programmable logic device (PLD) data transfer cable includes a parallel interface, a programming interface, and a logic control circuit. The parallel interface is used for connecting to PLDs. The logic control circuit includes a first group of transmission channels, a second group of transmission channels, a first group of switches, and a second group of switches. The first and second group of switches control the working status of the first and second group of transmission channels respectively. The electrical connections between pins of the parallel interface and the programming interface when first group of transmission channels are activated are different with those when second group of transmission channels are activated.

Data transfer cable for programmable logic devices

A switch-mode power supply for selectively providing power from a main power source and a standby power source to an electronic device is provided. The switch-mode power supply includes a signal input, a first transistor, a second transistor, a driving circuit, and a switching circuit. The signal input is used for receiving a control signal. The driving circuit and switching circuit connect the signal input to the gate of the second transistor in series. When the driving circuit detects the first transistor is switched off, the gate of the second transistor is immediately pulled up to open the second transistor, and when the driving circuit detects the first transistor is switched on, the gate of the second transistor is immediately pulled down to close the second transistor.

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Shenzhen, China

Jian-Chun Pan