The electronic components of the computer motherboard include capacitors, resistors, inductors, diodes, transistors, etc., in fact, these original components have their own functions, thus forming a complete set of circuits that support the normal operation of the circuit. After rigorous testing, none of them are indispensable. Data input and output, data decoding and calculation, sound amplification, etc. provide a complete connection.
Capacitor function on the motherboard(1) Filtering (most used. There are still a lot of AC components in the mainboard connected to the power supply, filtering out, to ensure that the CPU, NB, SB and other chips get a stable DC voltage and work normally.)
(2) RC delay circuit (see above explanation)
(3) Decoupling
(4) AC coupling (used by DMI interface of north and south bridge, SATA interface)
(5) Crystal tuning. (Required by South Bridge 32.768KHZ crystal oscillator)
(6) Energy storage.
The role of resistance components on the motherboard(1) Partial pressure. (In series, the feedback circuit in the OP+MOS power conversion circuit, and the feedback loop of some power ICs often use voltage series feedback to keep the output voltage constant, a lot of them)
(2) Current limit. (in parallel)
(3) Forming an RC delay loop (some signal delays, such as PWRGD delay when the next voltage is ENABLE, need to be delayed, and for example, the South Bridge chip has some requirements for timing, at this time through RC delay to fulfill)
(4) Signal integrity matching, matching resistance, depending on the situation and chip datasheet requirements, whether it is necessary to connect in series or in parallel to effectively suppress reflection interference. (For example, the output of the CLOCK chip CK series IC, many of them are 33 ohms, 22 ohms, and the four pairs of differential signals of the network card also need 75 ohm matching resistors, etc.)
(5) Pull-up resistor to improve driving capability. (OC, OD gate output must be connected, and some chips such as South Bridge GPIO must be connected according to the design guide when not in use, to maintain a stable state.)
(6) The pull-down resistor prevents the pin from floating, keeps the initial state stable, and avoids tri-state conditions.
(7) Thermistor detects temperature (CPU temperature, system environment temperature, etc.)
(8) The pull-up and pull-down level determines the initial address of the SMBUS device, etc.
Inductance(1) Filtering
(2) Concussion
(3) Decoupling
Diode action(1) Voltage stabilization
(2) Luminous LED
(3) Prevent current backflow. (Required when power is off)
FUNCTION DESCRIPTION
Countdown socket has an AC outlet, the maximum can output 230 V16A of power, there are two control modes, that is, countdown off and countdown on. It is convenient to control the equipment which needs to switch off or turn on AC. improve the safety of the use of some equipment and save more energy.
SET TIMER
1,Countdown plug in the socket, all indicator lights red flash three times, at this time the socket has no output, for the normal state, into the countdown state. Click the button, the first red light up, the socket output after an hour off, and then short press the button can set the socket timing of 2 H.4H.6H.8H.10H.OFF.
2,Long press button 3s, all indicator lights green flash three times, at this time the socket has output, for the regular open state, into the countdown on state. Click on the button, the first green light on, the socket is closed an hour later, and then press the button to set the socket countdown 2 H.4H.6H.8H.10H.OFF.
3,Press button 3 longer S, all indicator lights red light flash 3 times again into countdown mode.
4,Select the required countdown time mode, the corresponding mode countdown lights up, start countdown until the end of the countdown time. The outlet that controls the output will start or stop the output.
5,After the countdown starts, the time indicator will change automatically from high to low until the countdown is over.
NOTE:
1,Check that the power connection is good.
2,Use only indoors and in dry places.
3,This product does not convert AC voltage.
4,Maximum load not exceeding 16A 3680W.
5,Grounding is required for safety.
6,Any questions, please contact the electrician.
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NINGBO COWELL ELECTRONICS & TECHNOLOGY CO., LTD , https://www.cowellsockets.com