imovie tube

remaining low voltage pin is the collector C. Another method is to use HFE block to judge. After determining the base and tube of the transistor, the base of the transistor is inserted into the LO value measurement hole according to the base position and the tube type, the other two pins are inserted into any two of the remaining three measuring holes, observe the size of the data on the display, find the

Linear regulator based on op ampLinear regulator based on op ampWhy DIY?There are two reasons, the first is the market on the three-terminal regulator does not meet the requirements, either performance is not good, or not enough power.Second, the market also has a single show, excellent performance of the regulator, but they are expensive,For example, Ling Linear Technology's lt1581,13 dollars/piece, buy a bunch of components. Or they are uniquely packaged and cannot be easily interchanged with

Go to: http://www.elecfans.com/baike/bandaoti/bandaotiqijian/20100301174262.html Principle and Application of Photoelectric Coupler I. Principle and composition of Photoelectric Coupler 1. Principle. Photoelectric Coupler, usually referred to as photocoupler. The basic principle is to transmit electrical signals using light as a media. In some special application scenarios, the input/output end is required to achieve electrical isolation, so that traditional electronic devices cannot be used to

controls the power supply of the entire system. When the system has not been measured for more than 10 s, the power supply system of the entire system will be closed, in this way, the system consumes almost 0mA of the current (the Power Management Switch MOS tube consumes a small amount of static current ). Based on the above two factors, the system power-off management solution is more energy-saving, and is more suitable for laser range finder hosts

Faulty model: Great Wall C-I5271 type display; Fault Cause: Lightning strikes; Fault symptom: no display. The user reported that when the machine was struck by lightning, it made a "bang" sound. Analysis and maintenance: the power fuse (f901/3.15a) has been burned out and is black inside the casing. This indicates that the power supply has a serious short circuit fault. Test the Power Supply Adjustment tube drain pole (d) to ground resistance

The adjustment tube of the linear power supply is working in a magnified state, so the heat is generated and the efficiency is low (about 35%). A large heat sink is required, and a large power frequency transformer is also required, the transformer will be larger when multiple voltage outputs are to be made.The adjustment tube of the switch power supply is working in saturation and cutoff state, so it has a

server, and someone on the internet says that your router will be blocked if you crack, so for security reasons, unplug the phone line a little better. Below the use of telecommunications provided to your user account to enter the router (here my route IP address for http://192.168.1.1), the account is generally useradmin. When we enter, we open the HTTP://192.168.1.1/. backupsettings.conf this link, this link refers to the router's configuration file, when you open him, the browser will downl

Sometimes our monitor will appear ambiguous situation, this kind of situation is more common, encounter this kind of situation, what should we deal with the malfunction of the monitor when we encounter the ambiguity? The display of the content is ambiguous that the CRT focus is not good, resulting in poor focus on the main reason is the picture tube aging, or the anode high pressure is too low, or focus (focusing) voltage is incorrect. The inspection

and the load are connected in series, 3 (b), can also filter out the AC components in the ripple.(3) L, C filterA filter circuit consisting of 1 inductors and a capacitor is called an L-shape because it resembles an inverted letter "L", as shown in Figure 3 (c). A filter circuit with 1 inductors and 2 capacitors because the letter "π" is called the π type, see Figure 3 (D), which is a better filter circuit.(4) RC filterThe cost of the inductor is high, the volume is large, so in the current is

Note: Since the topic has not been added to the question bank, so I give the code does not guarantee AC, but for the test case to give the basic idea of the problem is correct. Topic 1: Electronic numbers Time limit: 10000ms Single point time limit: 1000ms Memory Limit: 256MB Describe Electronic numbers are common in life, and many electronic numbers are made from LED digital tubes. Digital LED digital tube is generally composed of 7 LEDs packaged t

;Specific product roles: The objects created by bulb and tube factory classes are instances of this role. It is implemented by a specific class in Java. abstract class Light{ public abstract void shine();}class BulbLight extends Light{ public void shine(){ System.out.println("Bulb Light is shine"); }}class TubeLight extends Light{ public void shine(){ System.out.println("Tube Light is thrn on"); }

optical drive, the fault can be eliminated. Common Failure VI: optical drive when reading data, sometimes can not read, and read the disk time to become longer Optical drive Read disk hardware failure is mainly concentrated on the laser head assembly, and can be divided into two cases: one is the use of too long to cause the aging of the laser tube, the other is that the surface of the photoelectric tube

Common fault One: the computer just opened the screen of the monitor jitter very badly, sometimes even the icon and text can not see clearly, but after one or two minutes will return to normal. This phenomenon occurs more in humid weather, is the cause of damp inside the monitor. To completely solve this problem, you can use the moisture-proof sand in food packaging with cotton thread string, and then open the rear cover of the monitor, the moisture-proof sand hanging in the image of the

A 5-Philosopher's dining problem Semaphore fork[5]; for (int i=0;i This solution will cause a deadlock. To avoid deadlocks 1. Allow up to four philosophers to fetch forks at a time 2. The odd number first takes the fork on the left hand side, the even number first takes the right hand side fork 3. Each philosopher takes two forks at hand to eat, or a fork does not take Semaphore fork[5]; for (int i=0;i void philosopher (int i) { If i mod 2==0 then { P (fork[i]); Even philo

. What materials are used for the optical fiber sheath? Answer: The cable sheath or protection layer is usually composed of polyethylene (PE) and polyvinyl chloride (PVC) materials. Its function is to protect the cable core from external influences. 25. List the special optical cables used in power systems. A: There are three types of special optical cables: The OPGW is placed in the power line of the aluminum-twisted steel ladle structure. The Application of OPGW Optical Fiber enables both g

The electron tube certainly shines. 1 . When you open the back cover of an electronic tube device, you will find that each tube emits an orange light, which is the light emitted by the filament of the tube, which is necessary to heat the cathode of the tube. 2, of course, yo

the fuel-saving and power-adding effect is remarkable, it can also reduce the drawbacks of a small number of holes that are often blocked by dirt and dirt, and easy to be cleaned by the lotion.According to the experimental results of several pedal-assisted carburetor, the gas distribution hole at one end of the carburetor Inlet can be expanded to 0mm ~ 5mm or so, not only reduces the amount of output, but also rich gas distribution to participate in gasoline atomization, engine power also has a

current limiting resistance R72, starting resistor R76, T3 drive transformer primary winding L1 respectively added to the Q15 oscillating tube B, c pole, Q15 conduction. The feedback winding L2 the inductive potential, and the positive feedback loop C44 and R74 add to the q15b pole to accelerate the Q15 conduction. T3 two times winding L3, L4 inductive potential on negative positive, rectifier tube BD5, BD

Sensitivity variation is a common fault of the optical mouse, the specific performance of mobile mouse, the cursor should be slow, do not listen to command. The failure of the original and solution is: 1 light-emitting Tube or photosensitive element aging: The core IC of the optical mouse has a constant current circuit, the working current of the luminous tube is constant in about 50mA, the high grade mous

reaction speed is slow and the service life will be affected after a long period of use. Mos adds some simple method of resistance and capacitance delay lines, which is cost-effective and suitable for low-end applications. The best method is to use a hot swapping chip. Generally, the chip contains a drive MOS design and current detection resistor. In addition to basic hot swapping, it can also provide special functions, such as controlling the current rising rate, power supply management, and s