Hon Hai Precision Industry Co., Ltd.

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

Scienbizip Consulting(shenzhen)co., Ltd.

Shenzhen Goldsun Network Intelligence Technology Co., Ltd.

Yi-Xin Tu

Hai-Qing Zhou

Jian-Chun Pan

Song-Lin Tong

Jin-Liang Xiong

Zheng-Quan Peng

Guo-Feng Zhang

A discharge circuit includes a pulse width modulator (PWM) chip, a first and second electronic switch, and a resistor. The first electronic switch receives a voltage creep from the PWM chip. When the voltage creep is less than a voltage making the first electronic switch to turned on, the voltage creep is discharged through the resistor and the second electronic switch.

Discharge circuit for power supply unit

A phase detection circuit includes first to third power input modules, first to third power input terminals, an alarm module, first to fifth electronic switches, and a power management module. The power input modules are used to convert pulse signals from a multi-phase power supply into direct current voltages and output the direct current voltages to the first to third electronic switches. When the multi-phase power supply operates abnormally, no direct current voltages are output to the first to third electronic switches and the alarm module alarms.

Phase detection circuit

A test circuit includes a first test circuit. The first test circuit includes a first light-emitting diode (LED) and a first resistor. An anode of the first LED is connected to a power supply. A cathode of the first LED is connected to a collector of a bipolar junction transistor (BJT) through the first resistor. An emitter of the BJT is grounded. A base of the BJT is connected to the power supply. A type of the BJT can be determined according to status of the first LED.

Test circuit for bipolar junction transistor

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 mouse includes a casing, a light, a switch, and a supporting device. The casing includes a base plate and a top cover covering the base plate. The top cover defines a receiving hole. The switch is electrically connected to the light and used to turn the light on and off. The supporting device is movably accommodated in the receiving hole and supports the light. The supporting device is capable of moving out of the receiving hole.

Computer mouse having illuminating function

Dock station

A voltage measurement apparatus includes a power interface, first and second voltage detecting modules, first and second driving modules, and first and second indication modules. The first voltage detecting module compares an output voltage with a first reference voltage, to determine whether the output voltage is greater than the first reference voltage. The second voltage detecting module compares the output voltage with a second reference voltage, to determine whether the output voltage is less than the second reference voltage. The first indication module indicates the output voltage when the output voltage is greater than the upper limit voltage or less than the lower limit voltage. The second indication module indicates the output voltage when the output voltage is less than or equal to the upper limit voltage and greater than or equal to the lower limit voltage.

Voltage measurement apparatus

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 socket protection device includes a fixing member, a cover, a limiting member, and an operation member. The fixing member is secured to a circuit board. The fixing member includes a pair of first connecting blocks. The cover includes a second connecting block, a first latching portion, and a second latching portion. The limiting member is secured to the circuit board. The operation member includes a shaft and an operation rod secured to the shaft. The shaft rotatably connects the cover to the fixing member via the first and second connecting blocks. When the operation rod is pressed to drive the shaft to rotate, the cover is rotated toward the socket. When the cover covers the socket, the first latching portion latches the limiting member, and the second latching portion latches the operation rod.

Socket protection device and circuit board assembly

A wireless unlocking system includes a programmable telephone. When the programmable telephone receives a call from a communication terminal along with a calling telephone number, the calling telephone number is matched with a number of pre-stored telephone numbers. The programmable telephone transmits an unlocking signal to an electrically controlled lock and unlocks a door if the telephone number of the call successfully matches one of the pre-stored telephone numbers.

Wireless unlocking system

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.

Growing community of inventors

Shenzhen, China

Yi-Xin Tu