whats multimeter

The server now seems to be very popular with XML, and all sorts of things are starting to support XML. The mobile suit that is good at doing things naturally is to take the lead in everything. Browsers, Office, SQL, MDAC, and XML mixed with one

electronic components is particularly important. This is also a skill that must be mastered by electronic maintenance personnel. I have accumulated some common electronic component testing experience and skills in electrical appliance repair for your reference. 1. Test the polarity of each foot of the rectification Bridge The multimeter sets the R × 1k block. The black table pen is connected to any pin of the bridge heap, and the red table pen test

dimension of the outer tuple is the length of the node list, and the dimension of the inner tuple is the number of the specified key.To modify the properties in the dictionary, we use SetStatus. In the following example, the background current is set to 376.0pA, which is the value that causes the neuron to periodically spike. Nest. SetStatus (Neuron, {"I_e": 376.0}) Note that we can set multiple properties at the same time by giving multiple comma-separated key: value pairs in the

interface on the Linksys WRT54G v2.2 vro motherboard.16.2.1 serial port Probe Next we use the basic observation method and multimeter to find the UART from the complex router motherboard, and determine the purpose of each pin of the UART. Because UART is not standardized, the method demonstrated here is not "universal ". This section uses the Linksys WRT54G v2 vrov2 as an example. There are two serial ports on the main board. Next we will demonstrate

1 fixed capacitor DetectionA is a small capacitor below 10 PF. Because the capacity of the fixed capacitor below 10 PF is too small, the multimeter can only be used for measurement to check whether there is leakage, internal short circuit or breakdown. During measurement, you can use a multimeter r×10k block, and use two pen to connect two pins of the capacitor separately. The resistance value should be inf

sweetheart name to replace this is not known who's Betty:>]. You may already know that if we want to know our user name in the system, we should run the following command: whoami The output is as follows: sk As you can see, my current login user name isSkNow I can use the following betty command to get the same result. betty whats my username The output is as follows: Betty: Running whoamisk Really cool, isn't it? Betty understands the "

Before the method of judging the transistor is used by the memory method, that is, as long as the three-level tube series Let it have a face of their own words, from left to right in turn is E-Class B class C. Until one time in the process of using the transistor circuit in a mistake, found that the pipe is always inexplicable conduction, find a good reason for a long time, finally found that the NPN tube has a sequence of e-Class C-Class B. In order to prevent further errors, and then found a v

1 People for Wake Power detection In short, it is to connect the computer motherboard 20 pin plug, with a wire (such as a thin wire, the specific people to play the imagination) a green line, a black line (there are 8), if the power supply fan turned on the power is good. With a thin wire to the ATX plug 14 feet ps-on and the other end of the 3rd, 5, 7, 13, 15, 16, 17 feet of any short foot connection, this is the ATX power supply in standby state of artificial wake-up start, when the ps-on si

Protection Board circuit principle and working process1. Schematic diagramSame as the single power-saving core, in the multi-energy-saving core protection circuit, the protection board must also be able to provide overcharge, over-discharge, over-current, short-circuit protection.Dual power-saving core protection board schematic diagramSix, general Protection Board Bad Reason analysis method1, no display (no voltage, charging, no load voltage low): When the battery is found no display, you can

/downloads/JPetStore-1-2-0.pdf) with roughly equivalent code efficiency ). Of course, it will be mentioned later about whether less code is good or not. Solve a basic problem first: How to make less code?Technical Means Technical means are not the focus of our speech today. Because technical means are limited by the level of developers, it is extremely difficult to increase the number of technical means at once. Moreover, the business itself will limit the use of technical means. However, let's

the interruption. There are two trigger modes: Level Trigger and edge trigger. Level Trigger refers to whether the peripheral has an interruption when the level is high or low, and the edge trigger is expressed by the rise or fall of the level on the interrupt line. Obviously, there are two kinds of edge trigger modes. One is that the center disconnection changes from low level to high level, which is called the rising edge trigger, and the other is that the center disconnection changes from hi

I. coaxial cable Detection1. After the cable enters the water, we have tested the change of Characteristic Impedance. When the cable enters the water due to moisture and the TV signal passes through the cable, the measured level is lower than the specified loss value of the cable. According to the length of the cable inlet and damp time, the loss attenuation value varies depending on the degree of corrosion and oxidation Rust of the internal and external cables.Under the face of moisture, water

) We often see 7 such as 103,224 of such labels on porcelain capacitors. This does not mean that the capacitance is 103PF or 224PF. Its capacity should be: the first two digits plus the number of "0" represented by the 3rd digit. For example: 103=10*1000=10000pf224=22*10,000=220,000pf=0.22μf2) There is a positive and negative polarity on the electrolytic capacitor, generally there are 8 indicators shown. There is also a common method of identification: The electrolytic capacitance of the non-she

measuring whether the power supply and ground are short-circuited with A multimeter before power-on during PCB debugging. That day, the problem occurred. I used a multimeter (black leather) to test the DSP's V power supply and ground, and the terrible "drop... Drop" sound. It's strange. No way. I am so careful about Circuit Welding. Don't joke. Then I began to check the circuit, continuously add welding, a

The symptoms of capacitance damage are: 1. Automatic restart of computer without reason 2, boot time to boot several times before starting 3. File loss 4, suddenly blue screen, etc... One, depending on the size of electrolytic capacitor, usually use multimeter R10, R100, r1k block for testing and judgment. The red and black pens are respectively connected to the cathode of the capacitor (before each test, the capacitor should be discharged), and

equipment for basic electrical and electronic technology skills. In order to do better, you can also add some practical lab content related to the professional needs. For example, capacitors are used in automobiles, but there is no requirement in the measurement content in the teaching materials. You can add experimental items for measuring capacitors. There are many sensors on automobiles, some sensors can be directly measured with A multimeter, so

Now a lot of people are accustomed to using mobile phone to entertain, but neglected the existence of the computer, causing the computer for a long time does not boot and caused a period of time after the computer automatic damage, often appear this situation will feel panic, so I am here to enumerate a few common problems and solutions, hoping to help everyone. 　　Tools/raw Materials Computer One Multimeter A Alcohol Screwdriver Keyboard 　　Meth

row to promote the transformer between the current limiting resistor in parallel a capacitor and a reverse diode. Usually this capacitor is organic electrolytic capacitor, the capacity from a few to hundreds of, with the increase in the use of time this capacitor will appear loss increases, capacity reduction (when its damage after the use of pointer multimeter is usually not measured out, the general use of digital

whether the isinlist auxiliary method works as expected: [Testfixture] public class stringhelpertests {// Assert is a helper class in the nunit framework. It contains methods to check whether the returned values meet expectations. If the returned value is not as expected, an exception is thrown. You can immediately see the row where your test failed. For example, assert. istrue checks whether the return value of the isinlist method is true. If the returned value is false, an exception is th

card, the problem is whether the hard disk adapter or the hard drive itself. ⑥ observe the stepper motor end of the stall pin is stuck to die, such as die, hand back to the starting position. The above steps, users need to carefully check, test, analysis, find out the bad components for repair, or replace the hard disk adapter card. After the above treatment, as long as it is not the hard disk body itself damage, only the general connectors of contact or external circuit failure most can qui