use barcode reader in asp.net PIN in Software

Encoder QR Code in Software PIN

TABLE 16.18 PIN
Recognizing Denso QR Bar Code In None
Using Barcode Control SDK for Software Control to generate, create, read, scan barcode image in Software applications.
Paint QR Code ISO/IEC18004 In None
Using Barcode creation for Software Control to generate, create QR image in Software applications.
ICSP CONNECTOR PINOUT
QR-Code Recognizer In None
Using Barcode recognizer for Software Control to read, scan read, scan image in Software applications.
QR Code Encoder In Visual C#.NET
Using Barcode generation for .NET framework Control to generate, create QR Code image in .NET applications.
FUNCTION
Quick Response Code Generator In VS .NET
Using Barcode generation for ASP.NET Control to generate, create QR Code JIS X 0510 image in ASP.NET applications.
QR Code 2d Barcode Drawer In Visual Studio .NET
Using Barcode generation for .NET Control to generate, create Denso QR Bar Code image in Visual Studio .NET applications.
1 2 3 4 5 6
QR-Code Generation In VB.NET
Using Barcode creation for .NET framework Control to generate, create QR Code 2d barcode image in VS .NET applications.
Data Matrix 2d Barcode Drawer In None
Using Barcode encoder for Software Control to generate, create Data Matrix image in Software applications.
_MCLR/Vpp (programming voltage) Vcc (normally +5 V) Gnd Data Clock LVP (low-voltage programming mode control)
Barcode Maker In None
Using Barcode drawer for Software Control to generate, create barcode image in Software applications.
Code 128A Generation In None
Using Barcode generation for Software Control to generate, create Code-128 image in Software applications.
This page intentionally left blank
UPC Code Printer In None
Using Barcode generation for Software Control to generate, create UPCA image in Software applications.
Drawing Bar Code In None
Using Barcode generator for Software Control to generate, create barcode image in Software applications.
PIC MCU INPUT AND OUTPUT DEVICE INTERFACING
Code 93 Full ASCII Encoder In None
Using Barcode printer for Software Control to generate, create Code 9/3 image in Software applications.
Print Barcode In Objective-C
Using Barcode encoder for iPhone Control to generate, create bar code image in iPhone applications.
If you were to look around your home, you would see a fairly limited variety of output devices that are used to help you to interface with the electronics in your home. Regardless of how technical they are, just about everyone has seen a light-emitting diode (LED) or pressed a button that produces a simple sound. These basic interfaces can be interfaced easily with PIC microcontrollers and allow you to create your own applications. Many of these interfaces can be added to an application with very little circuitry or software effort, and they do a lot to enhance an application and make it easier to work with. Under the covers of the various products around your home are another set of very common devices with standard interfaces. These devices and their interfaces provide additional functionality to the microcontrollers built into the products, and being standard devices with standard interfaces, the amount of effort to add them to applications is actually quite minimal. In this chapter I will be introducing you to a number of user interface and hardware function expansion devices that you can use in your own applications. Later in this book when I start introducing you to different applications, you will see these devices in action. The purpose of this chapter is to give you a more generic perspective on this aspect of PIC microcontroller application development and help you to understand the requirements of these devices and what impact they will have on the application development process.
Generate DataMatrix In Objective-C
Using Barcode creation for iPad Control to generate, create Data Matrix 2d barcode image in iPad applications.
Make 2D Barcode In .NET Framework
Using Barcode maker for ASP.NET Control to generate, create Matrix Barcode image in ASP.NET applications.
LEDs
Printing Barcode In .NET
Using Barcode creation for Reporting Service Control to generate, create barcode image in Reporting Service applications.
Code 128A Maker In None
Using Barcode generator for Online Control to generate, create Code-128 image in Online applications.
The most common form of output from a microcontroller is the LED. As an output device, it is cheap and easy to wire to a microcontroller. Generally, LEDs require anywhere from 5 to 25 mA of current to light (which is often within the output sink/source speci cation for most microcontrollers). What you have to remember, though, is that LEDs are diodes, which means current ows in one direction only. The typical circuit that I use to control an LED from a PIC microcontroller input-outpur (I/O) pin is shown in Fig. 17.1.
Barcode Encoder In Objective-C
Using Barcode drawer for iPhone Control to generate, create bar code image in iPhone applications.
Scan Code 3 Of 9 In Java
Using Barcode scanner for Java Control to read, scan read, scan image in Java applications.
Copyright 2008, 2002, 1997 by The McGraw-Hill Companies, Inc. Click here for terms of use.
PIC MCU INPUT AND OUTPUT DEVICE INTERFACING
Vcc Microcontroller 220 Ohms
Figure 17.1 The basic circuit for driving an LED consists of a current-limiting resistor and a PIC microcontroller I/O pin capable of sinking enough current to turn on the LED.
With this circuit, the LED will light when the microcontroller s output pin is set to 0 (ground potential). When the pin is set to input or outputs, a 1, the LED will be turned off. This is a general convention for operation that came about owing to simple transistor logic and the Intel 8051, which could not source a signi cant amount of current; it could only sink enough current to turn on an LED. The popularity of this approach has lead to a generation of engineers who design circuitry that turns on LEDs when the logic output is low. If you are new to electronics, this will de nitely seem counterintuitive, but it is something that you are going to have to accept (like the fact that current is measured in the direction opposite to electron ow). The 220- resistor is used for current limiting and will prevent excessive current that can damage the microcontroller, LED, and power supply. The reason why I use a 220- resistor is because when I was a student, I was told that I could never go wrong with it this is true, but it is also equally true for 330 and 470 in most applications. When you are designing your own applications, you should look at the LED s datasheet to understand its forward voltage as well as on current to properly calculate the best current-limiting resistor value. To calculate the correct voltage, start with the formula: Vapplied VLED ILED Rcurrent limiting
Copyright © OnBarcode.com . All rights reserved.