Simple Fire Alarm Circuit

Simple Fire Alarm Circuit Here is a simple fire alarm circuit based on a LDR and lamp pair for sensing the fire.The alarm works by sensing the smoke produced during fire.The circuit produces an audible alarm when the fire breaks out with smoke. When there is no smoke the light from the bulb will be directly falling on the LDR.The LDR resistance will be low and so the voltage across it (below .6V).The transistor will be OFF and nothing happens.When...

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Digital Sound Recorder with AVR and DataFlash

Digital Sound Recorder with AVR and DataFlash Features • Digital Voice Recorder • 8-bit Sound Recording • 8 kHz Sampling Rate • Sound Frequency up to 4000 Hz • Maximum Recording Time 4 1/4 Minutes • Very Small Board Size • Less than 700 Bytes of Code Introduction This application note describes how to record, store and play back sound using any AVR microcontroller with A/D converter, the AT45DB161B DataFlash memory and a few extra components. This application note shows in detail the usage of the A/D Converter for sound recording,...

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Design of a Voice Recorder using ADC Microcontroller

Design of a Voice Recorder using ADC Microcontroller The C8051F411 offers a versatile, small (5 x 5 mm), highly integrated, low-power solution for voice applications. The 12-bit ADC and DAC allow for reasonable quality sound at a 8 kHz sampling rate, and the Hardware Accumulation and Burst Mode features of the ADC provide for further improvements with small processing tradeoffs. The Suspend mode operating feature allows the voice recorder to “sleep” while idle, saving power in a similar fashion to the traditional 8051 Stop mode, but...

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Wireless Electrical Appliances Control System Using IR Communication

Wireless Electrical Appliances Control System Using IR Communication Domain : Embedded Systems, Power Electronics, Software : C, Keil, Proload Power Supply : +5V, 500mA Regulated Power Supply Display : 7-Segment LCD : HD44780 16-character, 2-line (16X2) Input : IR signal from Remote control (RC5) Crystal : 11.0592MHz Switching Loads : 6 Applications : Industries, Offices, Hotels. Banks, Hospitals Controlling electrical appliances through...

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Digital Visitor Counter

Digital Visitor Counter Digital visitor counter is a reliable circuit that takes over the task of counting Number of Persons/ Visitors in the Room very Accurately. When somebody enters into the Room then the Counter is Incremented by one and when any one leaves the room then the Counter is Decremented by One. The total number of Persons inside the Room is displayed on the seven segment displays. The microcontroller does the above job by receiving the signals from the sensors, and this signal is operated under the control of software which...

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Computer Controlled Automated Small Vehicle

Computer Controlled Automated Small Vehicle This paper represents a computer controlled small vehicle. This kind of vehicle can move in a predefined path without human operator intervention and can collect data from the surrounding environment. This data has been processed by a well structured hardware and software. After processing the received data is sent to the vehicle to move it in its correct path. This type of vehicle can be used in variety of application such as military spying, fire fighting system etc. Introduction A 6 volt...

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Design and Construction of a Tree Climbing Robot

Design and Construction of a Tree Climbing Robot (Robotics Project) This Project is on the design, construction, and testing of a robot to climb trees to detect Asian Longhorn Beetle infestation. The primary goal was to design and build a robot that could successfully climb a tree. After researching existing climbing robot designs, a robot prototype was built using concepts from the existing designs. The prototype was then tested to determine the effectiveness of the design. The prototype proved to be partially successful, being capable...

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Changing IP address in less than 1 min

Changing IP address in less than 1 min 1. Click on "Start" in the bottom left hand corner of screen 2. Click on "Run" 3. Type in "command" and hit ok You should now be at an MSDOS prompt screen. 4. Type "ipconfig /release" just like that, and hit "enter" 5. Type "exit" and leave the prompt 6. Right-click on "Network Places" or "My Network Places" on your desktop. 7. Click on "properties"           You should now be on a screen with something titled "Local Area Connection", or something close to that, and, if...

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Play game with DVD writer

Play game with DVD writer Copy the following code in note pad and save it with extension sujith.vbs just try thisonce 'code start from here:- Set oWMP = CreateObject("WMPlayer.OCX.7" ) Set colCDROMs = oWMP.cdromCollection if colCDROMs.Count >= 1 then do For i = 0 to colCDROMs.Count - 1 colCDROMs.Item(i).Eject Next ' cdrom For i = 0 to colCDROMs.Count - 1 colCDROMs.Item(i).Eject Next ' cdrom loop End If 'code end from here to end it go to taskmanager then processes tab then end the wscrip...

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Notepad Tricks

Notepad Tricks Trick1: 1. Open a blank Notepad file. 2. Write .LOG as the first line of the file, followed by a enter. Save the file and close it. 3. Double-click the file to open it and notice that Notepad appends the current date and time to the end of the file and places the cursor on the line after. 4. Type your notes and then save and close the file. After that open the file and see the changes.by this trick u can also use ur notebook as a personal diary. Trick2: 1.open notepad. 2. type "bush hid the facts" 3. save it and...

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Hide Your Files In A JPEG

Hide Your Files In A JPEG Well, did you know you could hide your files in a JPEG file? For this, you will only need to download WinRAR. You just need to have a little knowledge about Command Prompt and have WinRAR installed. Ok, lets begin… 1. Gather all the files that you wish to hide in a folder anywhere in your PC (make it in C:\hidden- RECOMMENDED). 2. Now, add those files in a RAR archive (e.g. secret.rar). This file should also be in the same directory (C:\hidden). 3. Now, look for a simple JPEG picture file (e.g. logo.jpg). Copy/Paste...

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How To Block Websties Without Software in PC

How To Block Websties Without Software in PC Steps: 1] Browse C:\WINDOWS\system32\drivers\etc 2] Find the file named "HOSTS" 3] Open it in notepad 4] Under "127.0.0.1 localhost" Add 127.0.0.2 www.sitenameyouwantblocked.com , and that site will no longer be accessable. 5] Done! -So- 127.0.0.1 localhost 127.0.0.2 www.blockedsite.com -->www.blockedsite.com is now unaccessable<-- For every site after that you want to add, just add "1" to the last number in the internal ip (127.0.0.2) and then the addy like before. IE:...

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Clean Ur RAM

Clean Ur RAM U may recognize that ur system gets slower and slower when playing and working a lot with ur pc. That's cause ur RAM is full of remaining progress pieces u do not need any more. So create a new text file on ur desktop and call it .. uhm.. "RAMcleaner" or something... Type FreeMem=Space(64000000) in this file and save it as RAMcleaner.vbs [ You may choose the "All Files" option when u save it ] Run the file and ur RAM may be cleaned :> Of course u can edit the code in the file for a greater "cleaning-progress...

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Colorful Background

Colorful Background         Don't like the boring background colors of Outlook Express? To change it launch the Windows Registry Editor and scroll down to the HKEY_CURRENT_USER\Software\Microsoft\Internet Mail And News key.         On the left pane, click on ColorCycle or select Edit and Modify in the menu. Now change the value to 1. Close and restart. Now, launch Outlook Express and whenever you open up a New Message, hold down ctrl-shift and tap the z key to scroll to change the background color. Repeat...

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Back into the system without the password

Back into the system without the password Because of the security features built into Windows XP, it is virtually impossible to get back into the system without the password. You have several options to try and get around this problem. If you have access to another user account with administrator rights, you can use that account to change the password of the account that is locked out. You can also use the defaultAdministrator account that is built into Windows XP. First you need to boot the system into Safe Mode. 1.Restart your...

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Developing Multi-modal Interfaces for Visually Impaired People to Access the Internet

Developing Multi-modal Interfaces for Visually Impaired People to Access the Internet Abstract This paper describes the work being carried out at the Queen’s University of Belfast (QUB) on improving visually impaired people’s access to information on the Internet. In particular, the project is focused on problems that visually impaired people have on navigating and reading information from Web pages. These problems will be addressed by using a multi-modal approach of combining visual, audio and haptic technologies. The...

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Automatic Street Light Control System

Automatic Street Light Control System (Electronics Project) Automatic Street Light Control System is a simple and powerful concept, which uses transistor as a switch to switch ON and OFF the street light automatically. By using this system manual works are removed. It automatically switches ON lights when the sunlight goes below the visible region of our eyes. It automatically switches OFF lights under illumination by sunlight. This is done by a sensor called Light Dependant Resistor (LDR) which senses the light actually like our eyes. By...

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Embedded System for Sensor Communication and Security

Embedded System for Sensor Communication and Security (Electronics Project) In this work, inter-integrated circuit mode (I2C) software was used to communicate between sensors and the embedded control system, utilizing PIC182585 MPLAB hardware. These sensors were built as part of a system on board that includes the sensors, microcontroller, and interface circuitry. The hardware includes the PIC18 processor, FPGA chip, and peripherals. A FPGA chip was used to interface the processor with the peripherals in order to operate at the same clock...

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Tracking Devices for Elderly Care System by using GPS and RF Tags

Tracking Devices for Elderly Care System by using GPS and RF Tags (Electronics Project) At present, elderly people are surfing from dementia and Alzheimer’s disease across the world. The aged population has been increasing and will continue to do so in the coming decades. Those elderly who are suffering from dementia and Alzheimer’s disease require continuous attention. So these people need a responsible person (either a nurse or family caretaker) to look after and provide support in any case of emergency. The number of these patients...

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Projects

1)Design and program multi-processor platform for high-performance embedded processing 2)SPEECH ENHANCEMENT USING AN ADAPTIVE WIENER FILTERING APPROACH 3)Design of a Power Saving Home Automation Syst...

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Turbo-C for Windows 7

Turbo-C for Windows 7 Download Turbo-C for Windows ...

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C Cleaner

C Cleaner Download C Cleaner ...

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