摘要:
An overvoltage protection circuit includes a connection jack, a path connection module, a voltage response module, and a control module. The connection jack is connected to a power supply. The path connection module is connected between the connection jack and a load. The voltage response module is to output a first signal in response to an overvoltage, and output a second signal in response to a constant voltage. The control module is to output a corresponding potential according to the first signal to turn off the path connection module, and output a corresponding potential according to the second signal to turn on the path connection module. When the path connection module is turned off, the connection between the connection jack and the load is disabled, when the path connection module is turned on, the connection between the connection jack and the load is enabled.
摘要:
A photoelectric switch control circuit includes a first resistance; a first capacitance; and a photoelectric switch having a plurality of contacts which comprise a first to a fourth contacts. The first contact is grounded, one end of the first resistance, the second and the third contacts of the photoelectric switch and one end of the first capacitance connects at node A, the fourth contact is connected with the processing unit and grounded via a second resistance, the other end of the first resistance is connected with a voltage source, the other end of the first capacitance is grounded.
摘要:
A power source connecting device includes an adapter, a rail and a plurality of power cables. The adapter connected to an external power source converts the alternating current output from the external power source to direct current. The rail electrically connects to the adapter. One end of each of the power cable connected to an electronic device, and another end of each of the power cable connects to the rail and is configured for slide along the rail together with the electronic device. The power cable remains in electrical connection with the rail during the sliding.
摘要:
A printed circuit board includes a substrate, at least one pad on the substrate, and permanent mold coatings capable of coating on the copper foil. Each pad includes a copper foil and a solder resist coating on the substrate and surrounding the copper foil. The copper foil defines an opening. The opening is coated with solder resist, whereby the permanent mold coatings form a recess corresponding to the opening when coated on the copper foil. A method for manufacturing a printed circuit board is also provided.
摘要:
An overvoltage protection circuit includes a connection jack, a path connection module, a voltage response module, and a control module. The connection jack is connected to a power supply. The path connection module is connected between the connection jack and a load. The voltage response module is to output a first signal in response to an overvoltage, and output a second signal in response to a constant voltage. The control module is to output a corresponding potential according to the first signal to turn off the path connection module, and output a corresponding potential according to the second signal to turn on the path connection module. When the path connection module is turned off, the connection between the connection jack and the load is disabled, when the path connection module is turned on, the connection between the connection jack and the load is enabled.
摘要:
A power supply circuit for providing over-voltage protection includes a power supply unit and an output. The power supply unit includes a power input control terminal and a power output terminal. The power output terminal configured for connection to the output for supplying power to a load connected to the output. The power supply circuit includes an over-voltage response unit for connection to the output, and a control unit. The control unit is connected between the over-voltage response unit and the power input control terminal. The over-voltage response unit is configured for turning on the control unit. The control unit is configured for transmitting a control signal to the power supply unit to control the power supply unit to stop outputting power when it is turned on.
摘要:
A power source connecting device includes an adapter, a rail and a plurality of power cables. The adapter connected to an external power source converts the alternating current output from the external power source to direct current. The rail electrically connects to the adapter. One end of each of the power cable connected to an electronic device, and another end of each of the power cable connects to the rail and is configured for slide along the rail together with the electronic device. The power cable remains in electrical connection with the rail during the sliding.
摘要:
An exemplary anti-pop circuit for use in an electronic device includes a switch module, a first path module, and a second control module. The first path module outputs a first response signal when the electronic device is being started, the switch module cuts off the connection between the audio IC and the speaker in response to the first response signal. The second control module includes a charge/discharge unit and a second path module. The charge/discharge unit is charged by the DC power supply when the electronic device is being started, and discharges to the second path module when the electronic device is being shut down. The second path module outputs a second response signal when the electronic device is being shut down, the switch module cuts off a connection between the audio IC and the speaker in response to the second response signal.