Q:In front of two, followed by two, are generally a relatively large and then a small tiles. What is the role? What is the difference between before and after? For example, 7805 this figure!

Large capacitor from the role of low-frequency filter, a small capacitor from the role of high-frequency filtering.

Q:AC power supply and DC power supply difference

AC power supply is the AC power supply is stable AC power. DC power supply is DC power supply

Q:Switch DC power supply is what it means

Commonly speaking, switching power supply is AC rectifier filter, and then through the crystal switch and a certain voltage regulator circuit, the switching transformer output high frequency voltage and current, rectified filter output stable DC power supply. "Best answer"

Q:I have a computer power supply, how to use it to change the power of other electrical appliances? 12V.5V must be. It has a lot of lines above, what color represents what the meaning? And then why is I connected to the power after the basic line basically no voltage output? Is there a thread that controls the output of the power supply?

If the power supply is exhausted, it can be converted to multi-power supply mode. Computer power There are multiple power supplies available: 1, + 5V (red line) 2, + 12V (yellow line) (Laptop fans use + 5V or + 3.3V). 3, + 3.3V (orange line): 4, + 5VSB (Stand By, purple line): 5, pay attention to the ground wire for the public grounding point on it.

Q:Why Capacitor Filtering in DC Regulated Power Supply

Because the capacitor filter out the AC, and the ability to store DC power. And the greater the capacity the better!

Q:Need a circuit, marked the size of the components, it is best to have a detailed calculation process. The circuit diagram can be viewed under MULTISIM Or send something to my mailbox Do good cash reward

LM317 voltage output range is 1.25V ~ 37V, 1.25V below can not guarantee. Circuit diagram is as follows, the voltage calculation formula Iadj is very small (50μA) can be ignored, the potentiometer resistance selection 4.7kΩ can meet the output voltage 1.25V ~ 24V adjustment range.

Q:DC power supply correct use of the method?

The third step, set the output voltage. By adjusting the voltage setting knob, the digital voltmeter shows the target voltage, complete the voltage setting. For adjustable current limiting power supply, there are two sets of adjustment system to adjust the voltage and current. Adjustment to be clear, the general adjustment of the voltage potentiometer "VOLTAGE" words, adjust the current potentiometer "CURRENT" words. Many of the entry-level products use low-cost coarse / fine twist knob settings, encounter double adjustment knob, we first fine knob knob to the middle position, and then through the coarse knob to set the approximate voltage, and then fine knob Precise correction. Step 4, set the current. Press the "Power" button on the power panel, then the ammeter will show the current value, adjust the current knob, so that the current value reaches a predetermined level. The general current limit can be set at 120% of the maximum current used. Some power supply without limiting the special adjustment button, the user needs to follow the instructions required short-circuit output, and then according to the short-circuit current limit with the current limit set current limit. Simple adjustable power supply without current setting function, there is no corresponding knob.

Q:What kind of regulated power supply needs to be installed in the equipment room?

.. answer: the key is how the price? I said to you that the exchange of high-density power supply is not very understanding, if it is online UPS I think you have to consider the money in the pocket but also equipped with professional staff to deal with the daily maintenance of the problem Oh asked: do not maintain the installation On it, the main play a role in regulating the voltage answer: That being the case, then on it, I think your room to prevent the adverse effects caused by power failure? The original regulator can be asked: 7500W enough, right? Answer: This I am not easy to answer you, the best your own account of a computer's maximum power, and then multiplied by 30 to see if it is less than 7500W can, of course, the best redundancy

Q:Why there will be 12v power supply what is the use

Friends, many devices are used 12-volt power supply, so there will certainly be 12-volt power supply ah. Commonly used in power amplifier, DVD and other household appliances inside the circuit. search for

Q:Is the switching power supply output from a regulated or pulsed power supply?

The pulse width at both ends of the transformer lead varies with the load or the pulse width which varies with the load and then becomes the pulsating DC through the rectifying element and then the pulsating DC becomes the flat by the discharge of the capacitor DC voltage through the regulator circuit to ensure the stability of the output so the result is the power supply voltage regulator phone is not the same as most of the regulator is also a cross-flow function there is no regulator of the DC (this is the kind of transformer, But 50HZ AC transformer after the rectification of the basic) out