Hon Hai Precision Industry Co., Ltd.

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

Wan-Hong Zhang

Guo-Yi Chen

Xiao-Gang Yin

Hong-Ru Zhu

Zhao-Jie Cao

A protective circuit includes a first jack, a second jack, a first control unit, a detecting circuit, and a logic control circuit. The first jack is connected to a power supply, and includes a grounding wire and a live wire. The second jack is connected to a load, and includes a grounding wire and a live wire. The first control unit includes a first relay, the first relay is connected to the live wire of the first jack and the live wire of the second jack. The detecting circuit detects whether the grounding wire of the first jack is grounded, and outputs indication signals accordingly. The logic control circuit outputs a control signal to the first control unit according to the indication signals to turn on/off the first relay, for allowing the live wire of the first jack to be connected to/disconnected from the live wire of the second jack.

Protective circuit for loads

A test card includes a power interface, a controller, a test interface, and a test point. The test interface includes a power pin, a start pin, and a data signal pin. The power interface is connected to the controller and the power pin, and also connected to an external power to receive a work voltage. The controller transmits a turn-on signal to the start pin. The test point is connected to the data signal pin. When an interface of a motherboard is connected to the test interface, the power pin, the start pin, and the data signal pin are connected to corresponding pins of the interface of the motherboard. The motherboard outputs a data signal to the test point through the motherboard interface and the test interface after the controller receives the turn-on signal.

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Shenzhen, China

Wan-Hong Zhang