xbee schematic

Constructed by the preceding method to correct a single error code is also known as the Hamming code. It has the following features: code length n = 2s-1, minimum code distance is d = 3, information code length k = 2n-s-1, error correction capability T = 1, supervised code length R = n-k = m. Here M is a positive integer ≥2. Given m, the Hamming Code (n, k) can be constructed ). (7, 4) simulation of the compiled code of the Hamming code: Figure 12.1 shows the

Protel Set the rule definition layer: Create a new PCB file Before you convert the design from the schematic editor to the PCB editor, you need to create a blank PCB with the most basic board profile. The easiest way to create a new PCB design in Protel DXP is to use the PCB wizard, which allows you to select the Industrial Standard Board profile and create your own custom board size. At any stage of the wizard, you can use the Back button to check

schematic code: String sql= "SELECT * from Ksinfo";//Generate SQL statement ResultSet rs = stmt.executequery (sql); Get data table result set Rs.movetoinsertrow ()//() move the datasheet cursor to the insertion record position rs.updatestring (1, ' 200701 ');//Enter the test number field into the Data rs.updatestring (2, ' Zhang Dawei ') //Fill in the Name field with Data rs.updateint (3,534);//Enter data into the score field rs

() +" ') "; Stmt.executeupdate (SQL); Two. Using the ResultSet objectUse the ResultSet object's method Movetoinsertrow () to move the datasheet cursor to the insertion position, and after entering the data, insert the record with the method InsertRow (). For example, the following schematic code: String sql= "SELECT * from Ksinfo";//Generate SQL statement ResultSet rs = stmt.executequery (sql); Get data table result set Rs.movetoinsertrow ()/

The difference between the outline design and the detailed design The schematic design is the structure of the software, including the modules, the hierarchical structure of the modules, the call relationships of the modules, the functions of each module, and so on. At the same time, we should design the overall data structure and database structure of the application system of the project, that is, what data is to be stored in the application system,

implementation diagram for the common join in hive is shown in Figure 1, mapper reads the join tables and goes to the (key, value) key value pair and deposits the temporary file. Hadoop sorts and merges these key-value pairs in the shuffle phase. Reducer will sort the merged results as output and join in the reducer phase. The shuffle phase requires a lot of CPU because of the need for sorting and merging. Omitting the shuffle and reduce phases can improve performance. Figure 1 Common join

　　What is Protel99se? Protel99se is applied to the WINDOWS9X/2000/NT operating system of EDA design software, the use of Design Library management mode, can be networked design, with strong data exchange capability and open and 3D simulation function, is a 32-bit design software, can complete circuit schematic design , printed circuit board design and programmable logic device design work, can design 32 signal layer, 16 power source-stratum and 16 ma

Overview: In the previous article, "Operating system: Cache principle based on page permutation algorithm (above)", we mainly elaborated FIFO, LRU and clock page replacement algorithm. Then, in the previous article, there are three core algorithms to explain. The LFU(Least frequently used),lru-k,MQ(Multi Queue) algorithms are respectively. This article link:http://blog.csdn.net/lemon_tree12138/article/details/50475240--coding-naga--Reprint please indicate the source 1.LFU We can see from LFU'

microcomputer, the cost is low, but the PC has a parallel port, many laptops are not connected now, which is troublesome. Most of the USB ports sold on the market are used for printers and cannot be used.The above is the schematic diagram. 74hc244 is used for signal isolation and driving. It supplies power from the target board by 4148. Because only four ISP programmers are signal lines, I actually replaced 74hc244 with 74hc125, to reduce the volume

? ° Original treats: In what input or circumstances does the test object cause defects and weaknesses, and trigger the failure of the test object? ° Affected by victims: Who is the affected target of the vulnerability or failure? What is the impact? The inside-out analysis method requires the tester to have a deep understanding of the testing objects, for example, the specific technical implementation of the testing objects. Inside-out is not limited to the testing team, but can also work with d

Digital Logic Circuit Course Design Report I. experiment content 1. 12-digit counter design. 2. Design of Digital Frequency meters. Ii. 12-digit Counter Design 1. design requirements Use 74ls192 to design a 12-in-order addition counter. the counter value ranges from 01 to 01 ~ 12-cycle, with 7-segment LED digital display. Verify with the DeII lab board. 2. Schematic Design 1. Use 74ls192 as the high and low positions of the count

I. PCB design PCB design plays an important role in electronic design. The quality of the circuit also determines the stability of the circuit. I am not going to introduce any tips here. I just want to talk about some details that are often ignored in the general process of using dxp to make a PCB. Before generating a PCB, we must first ensure the correctness of the schematic diagram. If the schematic diagr

I. PreparationsCreate a DDB file, create the relevant schematic file, and prepare the PCB for the design. I believe all the friends who want to draw four layers will. I don't need to talk about it any more. Ii. Create a fileCreate a new PCB File and draw the outer frame of the pcb on the keepoutlayer. For example, if you have used Protel, you should. 3. Set the Board LayerOn the PCB page, click design on the main menu and click layer stack manager. Cl

ProtelAndPadsConversion between related files By Gary Wu contact: yiqi1988@126.com Date: September 1st, 2012 1. SetProtelSchematic Component Library ImportPads: Operation: 1.1 startmenu-> mentor graphics SDD-> pads 9.0-> translators-> pads schematic translator; 1.2Set options for the conversion file: Select the source design format for translation: Protel 99se/dxp; Select the output design format: pads Logic 1.3Import related r

Http://blog.sina.com.cn/s/blog_99c8ec600102uxul.html1. Version: Altium Designer 102, Reason: In the multi-schematic design, the different schematic diagram through the net label connection, and the ad default Net label (network label) scope is automatic, that is, when Sch has sheet Entry (sheet entry) or port (port), the net The label is scoped to a single sheet. In the design, the scope of the net label is

ALTIUM.DESIGNER.16.1.11 Integrated Electronic Product development systemAltium Designer 16.1.9 Build 221 1DVDDetailed IntroductionEditCircuit Design Automation EDA (Electronic design Automation) refers to the circuit design in the various work to the computer to assist the completion. such as circuit schematic diagram (Schematic) of the drawing, Printed circuit board (PCB) file production, the implementatio

2.1 Obtaining schematics and PCB boardsLearning Arduino necessarily need to have an Arduino board, either buy or make their own, because the Arduino website provides each type of schematic and PCB, so the production is very convenient. The following is the production of our Arduino UNO Compatibility board Sagoo Uno. We've made some improvements and replacements based on the official Arduino UNO schematic, a

with the program, so I made a few suggestions for them to update and try again. So want to become a good engineer, need to grasp the integrity of the system and understanding of the existing circuit, in other words, give you a circuit diagram you can finally see how much,If you don't understand 80% or more, you are far from being a good engineer. The second is the circuit debugging ability and the ability to review the map, but the most basic ability or sch