barcode reader code in asp.net c# Part II in Software

Maker QR Code ISO/IEC18004 in Software Part II

Part II
QR Code Reader In None
Using Barcode Control SDK for Software Control to generate, create, read, scan barcode image in Software applications.
Make Quick Response Code In None
Using Barcode creation for Software Control to generate, create QR Code ISO/IEC18004 image in Software applications.
Electronics
Read QR-Code In None
Using Barcode reader for Software Control to read, scan read, scan image in Software applications.
QR Code Creator In C#.NET
Using Barcode printer for VS .NET Control to generate, create Quick Response Code image in .NET framework applications.
Table 137 BCD code 0 1 2 3 4 5 6 7 8 9 0000 0001 0010 0011 0100 0101 0110 0111 1000 1001
Creating QR Code ISO/IEC18004 In VS .NET
Using Barcode generator for ASP.NET Control to generate, create QR Code image in ASP.NET applications.
Generating QR Code In Visual Studio .NET
Using Barcode printer for .NET framework Control to generate, create QR Code image in .NET applications.
Table 138 Three-bit Gray code Binary 000 001 010 011 100 101 110 111 Gray 000 001 011 010 110 111 101 100
QR-Code Maker In Visual Basic .NET
Using Barcode generator for .NET framework Control to generate, create QR-Code image in VS .NET applications.
GS1-128 Generator In None
Using Barcode drawer for Software Control to generate, create EAN 128 image in Software applications.
also other BCD codes, all re ecting the same principle: that each decimal digit is represented by a xed-length binary word One should realize that although this method is attractive because of its direct correspondence with the decimal system, it is not ef cient Consider, for example, the decimal number 68 Its binary representation by direct conversion is the seven-bit number 1000100 On the other hand, the corresponding BCD representation would require eight bits: 6810 = 01101000BCD Another code that nds many applications is the Gray code This is simply a reshuf ing of the binary code with the property that any two consecutive numbers differ only by one bit Table 138 illustrates the three-bit Gray code The Gray code can be very useful in practical applications, because in counting up or down according to this code, the binary representation of a number changes only one bit at a time The next example illustrates an application of the Gray code to a practical engineering problem
Create DataMatrix In None
Using Barcode creation for Software Control to generate, create ECC200 image in Software applications.
Code 39 Printer In None
Using Barcode generator for Software Control to generate, create Code 3 of 9 image in Software applications.
Digital Position Encoders
Generate Bar Code In None
Using Barcode encoder for Software Control to generate, create barcode image in Software applications.
Code 128C Drawer In None
Using Barcode creation for Software Control to generate, create Code 128 image in Software applications.
Position encoders are devices that output a digital signal proportional to their (linear or angular) position These devices are very useful in measuring instantaneous position in motion control applications Motion control is a technique that is used when it is necessary to accurately control the motion of a moving object; examples are found in robotics, machine tools, and servomechanisms For example, in positioning the arm of a robot to pick up an object, it is very important to know its exact position at all times Since one is usually interested in both rotational and translational motion, two types of encoders are discussed in this example: linear and angular position encoders An optical position encoder consists of an encoder pad, which is either a strip (for translational motion) or a disk (for rotational motion) with alternating black and white areas These areas are arranged to reproduce some binary code, as shown in Figure 139, where both the conventional binary and Gray codes are depicted for a four-bit linear encoder pad A xed array of photodiodes (see 8) senses the re ected light from each of the cells across a row of the encoder path; depending on the amount of light
Making GS1 - 12 In None
Using Barcode generator for Software Control to generate, create UPC - E0 image in Software applications.
Data Matrix ECC200 Recognizer In C#
Using Barcode decoder for .NET Control to read, scan read, scan image in .NET framework applications.
FOCUS ON MEASUREMENTS
Encode GS1 128 In Java
Using Barcode printer for BIRT reports Control to generate, create UCC-128 image in Eclipse BIRT applications.
Read UPC Symbol In Java
Using Barcode reader for Java Control to read, scan read, scan image in Java applications.
13
Print UCC - 12 In .NET
Using Barcode creator for Reporting Service Control to generate, create GS1-128 image in Reporting Service applications.
Decoding ECC200 In Visual Basic .NET
Using Barcode scanner for .NET framework Control to read, scan read, scan image in Visual Studio .NET applications.
Digital Logic Circuits
Bar Code Generation In .NET Framework
Using Barcode creator for ASP.NET Control to generate, create barcode image in ASP.NET applications.
EAN / UCC - 14 Reader In C#.NET
Using Barcode scanner for VS .NET Control to read, scan read, scan image in Visual Studio .NET applications.
Decimal 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
Binary 1111 1110 1101 1100 1011 1010 1001 1000 0111 0110 0101 0100 0011 0010 0001 0000
Decimal 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
Gray code 1000 1001 1011 1010 1110 1111 1101 1100 0100 0101 0111 0110 0010 0011 0001 0000
Figure 139 Binary and Gray code patterns for linear position encoders
re ected, each photodiode circuit will output a voltage corresponding to a binary 1 or 0 Thus, a different four-bit word is generated for each row of the encoder Suppose the encoder pad is 100 mm in length Then its resolution can be computed as follows The pad will be divided into 24 = 16 segments, and each segment corresponds to an increment of 100/16 mm = 625 mm If greater resolution were necessary, more bits could be employed: an eight-bit pad of the same length would attain a resolution of 100/256 mm = 039 mm A similar construction can be employed for the ve-bit angular encoder of Figure 1310 In this case, the angular resolution can be expressed in degrees of rotation, where 25 = 32 sections correspond to 360 Thus, the resolution would be 360 /32 = 1125 Once again, greater angular resolution could be obtained by employing a larger number of bits
Binary sequence
Gray code
Figure 1310 Binary and Gray code patterns for angular position encoders
EXAMPLE 132 Conversion from Binary to Hexadecimal
Problem
Convert the following binary numbers to hexadecimal form
Part II
Electronics
1 100111 2 1011101 3 11001101 4 101101111001 5 100110110 6 1101011011
Solution
Analysis: A simple method for binary to hexadecimal conversion consists of grouping
each binary number into four-bit groups, and then performing the conversion for each four-bit word following Table 136: 1 1001112 = 00102 01112 = 2716 2 10111012 = 01012 11012 = 5D16 3 110011012 = 11002 11012 = CD16 4 1011011110012 = 10112 01112 10012 = B7916 5 1001101102 = 00012 00112 01002 = 13616 6 11010110112 = 00112 01012 10112 = 35B16
Copyright © OnBarcode.com . All rights reserved.