Introduction
This project is basically an eight line intercom from which you can call 1 to 8 number. This system also support dialing and receiving telephone calls.
Video Converter All in one
 | 4Videosoft Video Converter Platinum
Product ID: 3122342
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4Videosoft Video Converter Platinum can convert between any video formats including MPG, MPEG, MPEG2, MP4, SWF, FLV, VOB, MOD, M4V, AVI, etc, along with HD videos, like HD TS, HD MPG, HD MPEG, HD MP4, HD AVI, etc and extract audio from these videos. | ||||||||||||||||
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komentar
Label:
along with HD videos,
AVI,
etc,
etc and extract audio from these videos.,
FLV,
HD AVI,
HD MP4,
HD MPEG,
HD MPG,
like HD TS,
M4V,
MOD,
MP4,
MPEG,
MPEG2,
MPG,
SWF,
VOB
Digital Image Sensors With CMOS
Adding vision to your projects needs not be a difficult task. Whether its machine vision for robot control or the sampling and storage of images for security, CMOS images sensors can offer many advantages over traditional CCD sensors. Just some of the technical advantages of CMOS sensors are,
Circuit Falcom FSA03 Smart Antenna with uBlox 5 GPS Chipset
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The Falcom FSA03 GPS module is an extremely cost effective GPS solution for
embedded systems. Retailing for about $50 USD in small quantities, the FSA03 includes an uBlox 5 single
chip GPS module integrated with a Sarantel quadrifilar helix antenna to make a tidy single board solution.
Official documentation from Falcom indicates the FSA03 has an asynchronous 3.3V serial port for communications using NMEA or UBX binary protocols, a time pulse output and reset input. What the official documentation doesn't indicate is that a USB port and external interrupt pin is routed out but recorded as N.C. (not connected) on the documentation. |
Article USB in a NutShell Part 5
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Every USB device must respond to setup packets on the default pipe. The setup packets are used for detection and
configuration of the device and carry out common functions such as setting the USB device’s address, requesting a
device descriptor or checking the status of a endpoint.
Article USB in a NutShell Part 4
USB Descriptors
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All USB devices have a hierarchy of descriptors which describe to the host information such as what the device is,
who makes it, what version of USB it supports, how many ways it can be configured, the number of endpoints and
their types etc
The more common USB descriptors are
Article USB in a NutShell Part 4
Article USB in a NutShell Part 3
USB Protocols
Unlike RS-232 and similar serial interfaces where the format of data being sent is not defined, USB is made up of several layers of protocols. While this sounds complicated, don’t give up now. Once you understand what is going on, you really only have to worry about the higher level layers. In fact most USB controller I.C.s will take care of the lower layer, thus making it almost invisible to the end designer.Each USB transaction consists of a
Article USB in a NutShell Part 2
Connectors
All devices have an upstream connection to the host and all hosts have a downstream connection to the device. Upstream and downstream connectors are not mechanically interchangeable, thus eliminating illegal loopback connections at hubs such as a downstream port connected to a downstream port. There are commonly two types of connectors, called type A and type B which are shown below. |  |
Article USB in a NutShell Part 1
Making sense of the USB standard
Starting out new with USB can be quite daunting. With the USB 2.0 specification at 650 pages one could easily be put off just by the sheer size of the standard. This is only the beginning of a long list of associated standards for USB. There are USB Class Standards such as the HID Class Specification which details the common operation of devices (keyboards, mice etc) falling under the HID (Human Interface Devices) Class - only another 97 pages. If you are designing a USB Host, then you have three Host Controller Interface Standards to choose from. None of these are detailed in the USB 2.0 Spec.About of MP3 Player
The Bottom Line Quite a few developments have occurred since I've written my two how to choose an MP3 player and CD-MP3 player essays. Time to reevaluate the market!
MP3 player technology has become cheaper with new products and breakthroughs on the horizon. Time to reevaluate the market and consider whether it's time to wait for the new technology or is it okay to buy now?
Consumer electronics
Consumer electronics are electronic equipment intended for everyday use, most often in entertainment, communications and office productivity. Radio broadcasting in the early 20th century brought the first major consumer product, the broadcast receiver. Later products include personal computers, telephones, MP3 players, audio equipment, televisions, calculators, GPS automotive electronics, digital cameras and players and recorders using video media such as DVDs, VCRs or camcorders. Increasingly these products have become based on digital technologies, and have largely merged with the computer industry in what is increasingly referred to as the consumerization of information technology.
Data Transfer 80C51
Internal RAM
Table 3 shows the menu of instructions that are available for moving data around within the internal memory spaces, and the addressing modes that can be used with each one. With a 12MHz clock, all of these instructions execute in either 1 or 2ms. The MOV [dest], [src] instruction allows data to be transferred between any two internal RAM or SFR locations without going through the Accumulator.
Table 3 shows the menu of instructions that are available for moving data around within the internal memory spaces, and the addressing modes that can be used with each one. With a 12MHz clock, all of these instructions execute in either 1 or 2ms. The MOV [dest], [src]
Instruction Set of 80C51
Arithmetic Instructions
The menu of arithmetic instructions is listed in Table 1.4.1 The table indicates the addressing modes that can be used with each instruction to access the operand.
For example, the ADD A, instruction can be written as:
The menu of arithmetic instructions is listed in Table 1.4.1 The table indicates the addressing modes that can be used with each instruction to access the
For example, the ADD A,
Addressing modes in the 80C51
The addressing modes in the 80C51 instruction set are as follows:
An "addressing mode" refers to how you are addressing a given memory location. In summary, the addressing modes are as follows, with an example of each:
An "addressing mode" refers to how you are addressing a given memory location. In summary, the addressing modes are as follows, with an example of each:
Special Function Register Microcontroller
A Map of the on-chip memory area called the Special Function Register (SFR) space is shown in Figure 1.2.1. Note that in the SFRs not all of the addresses are occupied. Unoccupied addresses are not implemented on the chip. Read accesses to these addresses will in general return random data, and write accesses will have no effect.
Microcontroller MCS-51 Architecture
Memory Organization
All 80C51 devices have separate address spaces for program and data memory, as shown in Figures 1.1.1 and 1.1.2. The logical separation of program and data memory allows the data memory to be accessed by 8-bit addresses, which can be quickly stored and
All 80C51 devices have separate address spaces for program and data memory, as shown in Figures 1.1.1 and 1.1.2. The logical separation of program and data memory allows the data memory to be accessed by 8-bit addresses, which can be quickly stored and
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