A liquid crystal display (LCD) is a flat panel display, electronic visual display, or video display that uses the light modulating properties of liquid crystals. Liquid crystals do not emit light directly. LCDs are available to display arbitrary images (as in a general-purpose computer display) or fixed images which can be displayed or hidden, such as preset words, digits, and 7-segment displays as in a digital clock. They use the same basic...

 60 p dtu 01/11/2012 212 1 Download

In computing, input/output or I/O is the communication between an information processing system (such as a computer) and the outside world, possibly a human or another information processing system. Inputs are the signals or data received by the system, and outputs are the signals or data sent from it. The term can also be used as part of an action; to "perform I/O" is to perform an input or output operation. I/O devices are used by a person...

 66 p dtu 01/11/2012 200 1 Download

PIC is a family of modified Harvard architecture microcontrollers made by Microchip Technology, derived from the PIC1650 originally developed by General Instrument's Microelectronics Division. The name PIC initially referred to "Peripheral Interface Controller". PICs are popular with both industrial developers and hobbyists alike due to their low cost, wide availability, large user base, extensive collection of application notes, availability...

 47 p dtu 01/11/2012 270 1 Download

Some microcontrollers may use four-bit words and operate at clock rate frequencies as low as 4 kHz, for low power consumption (milliwatts or microwatts). They will generally have the ability to retain functionality while waiting for an event such as a button press or other interrupt; power consumption while sleeping (CPU clock and most peripherals off) may be just nanowatts, making many of them well suited for long lasting battery...

 100 p dtu 01/11/2012 195 1 Download

Microcontrollers are used in automatically controlled products and devices, such as automobile engine control systems, implantable medical devices, remote controls, office machines, appliances, power tools, toys and other embedded systems. By reducing the size and cost compared to a design that uses a separate microprocessor, memory, and input/output devices, microcontrollers make it economical to digitally control even more devices and...

 138 p dtu 01/11/2012 235 1 Download

A microcontroller (sometimes abbreviated µC, uC or MCU) is a small computer on a single integrated circuit containing a processor core, memory, and programmable input/output peripherals. Program memory in the form of NOR flash or OTP ROM is also often included on chip, as well as a typically small amount of RAM. Microcontrollers are designed for embedded applications, in contrast to the microprocessors used in personal computers or other...

 90 p dtu 01/11/2012 203 1 Download

Hệ thống thông tin di động toàn cầu GSM ( Global System for Mobile Communications) là một công nghệ dùng cho mạng thông tin di động. Dịch vụ GSM được sử dụng bởi hơn 2 tỷ người trên 212 quốc gia và vùng lãnh thổ. Các mạng thông tin di động GSM cho phép có thể roaming với nhau do đó những máy điện thoại di động GSM của các mạng GSM khác nhau ở có thể sử...

 118 p dtu 01/11/2012 221 3 Download

Software footprint and software functionality is a product of memory bandwidth (code and application storage space), processor bandwidth (the speed at which instructions can be processed), and code bandwidth (number of lines of code). Over the past three generations of cellular phone, memory bandwidth has increased from a few kilobytes to a few Megabytes to a few Gigabytes. Processor bandwidth has increased from 10 MIPS (millions of...

 561 p dtu 01/11/2012 199 1 Download

If you are an academic, stop reading this book and put it down right now. go back to your office, have a nice cup of tea, and review one of those papers you set aside six weeks ago. If you do this, you'll fell better. If you keep reading, you will just get upset. This book is not for you, anyway.

 144 p dtu 01/11/2012 187 3 Download

A control system is a collection of components working together under the direction of some machine intelligence. In most cases, electronic circuits provide the intelligence, and electromechanical components such as sensors and motors provide the interface to the physical world. A good example is the modern automobile. Various sensors supply the on-board computer with information about the engine’s condition. The computer then calculates the...

 635 p dtu 01/11/2012 213 4 Download

Một số đặc điểm rất quan trọng trong khi gia công trên máy điều khiển theo chương trình số CNC là đạt được hiệu quả kinh tế cao ngay cả trong điều kiện sản xuất hàng loạt vừa và nhỏ. Chính nhờ đặc điểm linh hoạt cao của nó mà khi chuyển từ việc gia công kiểu chi tiết này sang gia công kiểu chi tiết khác người ta chỉ việc thay đổi chương...

 14 p dtu 29/10/2012 191 1 Download

Trong quá trình lập chương trình gia công chi tiết, người ta thường chỉ quan tâm đến các yếu tố hình học ( biên dạng của chi tiết gia công) nva2 các thông số công nghệ như: gia công, bán tinh hoặc tinh; tính chất vật liệu của chi tiết gia công; chế độ tưới dung dịch bôi trơn, làm mát...

 31 p dtu 29/10/2012 187 1 Download