The Design of printed circuit board is very important for the anti-interference ability of single chip microcomputer system. The printed circuit board and wiring should be designed based on the three principles of minimizing noise sources, minimizing noise propagation and coupling, and minimizing noise absorption.The printed circuit board should be reasonably partitioned. The single-chip microcomputer system can be divided into three zones, namely, the analog zone (for fear of interference), the
face is exposed. 83. I am not a fortune teller on the flyover. I cannot tell you so much about it. 84. The word "I love my brain twenty and my spinal cords have been around for decades. It is never necessary. 88. Once we thought we could die for love. In fact, love cannot die. It only takes a needle in the most painful place. Then we were crying, and we were tossing and turning. We had been ill for a long time, we are made of steel. You are not a
certain frequency point. It is necessary to estimate the noise frequency in advance to select an appropriate model. Magnetic beads do not match when the frequency is uncertain or unpredictable. the capacitor is separated directly, causing float. the inductance is large in size, with many stray parameters and unstable. 0 euro resistance is equivalent to a very narrow current path, which can effectively limit the Loop Current and suppress noise. Resistance degrades in all frequencies (0 euro r
accept, movable is movable, alterable can change, can change, available, can get, uncomfortable is not comfortable.
2.-Al indicates that there is... AttributesRegional local natural, special, special, spinal, Central, vertrbral spinal, cervical neck, mural wall, terminal, typical typical: Digital finger, digital, temperal temporary, transient, capital primary, important, vocal, vocal cords, several, parasternal beside the sternum.
3.-ant is derived f
, rather than an inductor.
The zero-euro resistance has the following functions:
A resistance with a resistance value of 0 ohm is called a 0 euro resistance.
First of all, we should understand that 0 euro resistance is only available in ideal conditions. In reality, it does not exist. Only the resistance of 0 euro is as close as possible.
0 euro resistance has the following functions:
1. There is no function in the circuit, just for convenience of debugging or Compatibility Design on the PCB
Composition of a mobile phone:
CPU central processor
Memory
LCM display
Touchpanel: Capacitive screen/resistive Screen
Headset headphones
Bluetooth
WiFi
GPS navigation
Mic mic
Receive Receiver
Speak speaker
Image sensor camera
G-sensor gravity Sensor
M-sensor compass
Keypad keyboard
Backlight IC screen Backlight
RF module
USB Data Interface
FM radio
Vibrate vibration Motor
Ofn Optical Mouse
Jarball trackball
ATV analog TV
DTV
Battery battery
Some terms that software B needs to knowRegulated powe
connect the corresponding line according to the above definition. In fact, the 5pin and 6pin, 9pin, and 10pin are connected by a single wire in some chassis, and the same effect can be achieved.It seems that there are a lot of lines, but it is also very easy to remember, you may wish to follow the instructions I remember. First remember the first three, the first is the microphone input, the second is the ground, the third is the microphone voltage, then the 5pin and 6pin into the right channel
permeability of the core is high. Therefore, the inductance is large, and the electromagnetic interference is restrained by reflection, in this case, the core loss is small, and the entire device isLow-loss, high-Q-characterized inductor, which may cause resonance in the low-frequency segment, and sometimes may cause interference enhancement after the use of ferrite magnetic beads.In the high-frequency band, the impedance is composed of resistance components. As the frequency increases, the mag
simulator for this function is not very good. Therefore, jlinkv8 selects Gnd only for the target board, but not for VCC. Therefore, I think this mode is the most reasonable. Of course, there is no error in the total Gnd and VCC between the simulator and the target board.
3. SWD mode setting in MDK
In the debugging simulation with J-LINK mode is enough, and in the MDK his function has been done very well, with the standard 20 feet of JTAG download, the speed is very fast, this is generally the
In recent years, with the development of family-oriented control and automated short-distance wireless technology, opportunities brought about by smart home are becoming a reality. Compared with traditional Smart Home, light home has two obvious advantages: Easy installation and easy interaction. Among the various short-distance wireless communication technologies that have emerged, EnOcean, Zigbee, Z-Wave, and Bluetooth are currently the main means to connect to smart home products.
EnOcean
EnO
checking a dirty connector, the probe on the tester is not cleaned and another connector is tested again, leading to cross contamination. Therefore, it is very important to clean the probe of the tester. If an unclean test jumper is used, contamination may spread, resulting in high loss. Remember that jumpers can be contaminated by unclean connectors. Similarly, think about the number of patch cords that have been installed without cleaning or testin
Look at the Multi-Mode Optical Cable axis of fluke networks, which ensures that the Multi-Mode Optical Cable axis complies with the TIA/EIA standard.
The multi-mode optical fiber axis of fluke network is a simple and economical method:
Improved repeatability and continuity of multimode optical power and loss measurements when using LED light sources and 0mm patch cords
Ensures your measurement complies with TIA/EIA-568-B standards
The correctnes
group is controlled by an air switch, internet cafes can be divided into 4-6 groups or more groups.
Select the model of the power cord Based on the load of each trunk. In general, the main line uses copper core lines, the following branch lines can use aluminum core lines I suggest, it is best to all the lines of the Internet cafe Power System Using GB copper core lines ). At the same time, select different types of power cords based on the load of t
tobacco conductress must have got. Of course, I have to talk about, let the novice to talk, I basically can only eat in the big stalls at night. The video opened, opposite appeared a handsome man, the appearance is tactful, the vocal cords are very fine. Each other very false courtesy, he proudly introduced a bit of his factory, very large, because of the development of too fast too fast too quickly too fast, and now want to do a website (I do not kn
boards, power cords and ground wires are the most important. The main method to overcome electromagnetic interference is grounding.For the dual panel, the ground line layout is particularly exquisite. By using the single point grounding method, the power supply and ground are connected from both ends of the power supply to the printed circuit board. The power supply is one point, one point. On the printed circuit board, there must be multiple return
JinggongExercise: this exercise is suitable for desk and desk in the classroom. Sit in the chair and put both hands on the desktop and shoulder width. Down the forehead to the desktop. In this status, perform the breath action, and then slowly raise your head during the same breath. At this time, the back, body, and shoulder should be completely relaxed. While slowly breathing again, let the chin close to the chest, after the neck has fully stretched feeling better, bow down and let the forehea
Song from the French movie butterfly Le Papillon
Song from the French movie Le PapillonLe Papillon is a warm and touching movie. It attracted millions of viewers when it was released in France. The original vocal cords of this movie are equally outstanding.
The Music Artist Nicolas Errera uses the piano and other strings as the main tone, giving a gentle and elegant melody, revealing the French romantic sentiment and smooth music until
between the string bow and the string, and the sound of the finger-hitting string) is located in this frequency band. When the intensity is too strong, the speech recognition will be masked, when there is not enough, the sound penetrating power drops. The frequency range of the tweeter is 5 kb to 10 KB Hz. being responsible for the legality of the voice, affecting the sound's sense of distance, intimacy, and color. If the sound is too strong, the sound of the wood pipe (such as the short flute
. The first two digits are the coordinates in the upper left corner, and the last two digits are the coordinates in the lower right corner.Example:
B. Circle: three digits must be used. The first two digits are the coordinates of the center, and the last digit is the radius length.Example:
C. Any image (polygon): Fill in the coordinates of each turning point of the image in orderExample:
Note the following points when creating the results described in this article:1. Do not forget to set the
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