The Era of Technology

OVERVIEW OF THE PROJECT This is a 8051 microcontroller based project. We have developed a development board of our own using a purchased PCB and then integrating it with the required peripheral devices necessary for making this project. We make use of 6-d accelerometer for motion sensing and serial programmer for decoding the C program developed in Keil interface into the microcontroller. Just by the movement of our hand we can record the password for security purposes and then retrieve it whenever we require it. When we move our hands, a particular password is generated according to the position of the hand. Then this code is stored in the physical memory of the microcontroller. When the same user again enter the code, then it will be compared to the previously stored code and authenticate the respected user. This project will be of great help in the field of security in today's world of hackers and thieves. Features/components of this project Clock is generated using a crystal oscillator of 11.0592 mhz. Serial programmer using max- 232 and rx-232 IC's. 16 x 2 parallel alphanumeric LCD display is used to display the output. 12 volt relay is used to display the interrupts developed in the program. 100 kΩ potentiometer is used to increase or decrease the brightness of the small LCD used in the project. LED's and switches are used to ensure correct working of the circuit. 7805 and 7812 voltage regulators are also used to make the circuit voltage equal to 5 volt and 12 volts respectively. 1.5 G/2G/4G/6G 3 Axis Linear Accelerometer Module is used for motion sensing of the hand gestures. Keil 3 and Proteus 7 softwares are used for code development. The core of the project is the Philips 8051 microcontroller. Voltage supply is given by a 12v adaptor. ADC0808 is used for 8 channel analog to digital conversion. 2,3,4,8 pin connectors are used for completing the circuit Working of the Project The accelerometer is attached inside a glove which is worn by the user and act as the motion sensor. The feedback of the sensor is continuously fed to the microcontroller using the adc channel of the development board. The password is generated as a sequence of 6-9 numbers, each number generated from the motion sensor position and recorded at frequent intervals. All the possible state of the motion sensor and its equivalent number is initially stored in the memory. When the use makes his own air signature, then the numbers are fetched from the memory according to his hand gesture. These numbers makes up the personal password which is stored along with the time stamp and name of the user in the physical memory. By this process, a unique password is generated using the air signature concept for all the accessed users. Conclusion We have successfully implemented our project and satisfactorily generated a secured code using accelerometer and microcontroller along with other accessories. It recognizes ones action and then generate a unique code for a particular person which allows him/her to protect their confidential things from thieves and hackers. This project can be implemented on some open source hardware like Arduino and made available for the general public to be used in their day to day life.

Applying a website music player to some of your posts can be incredibly valuable for you. A website music player allows you to communicate with your users right from the moment they come into your page. You can introduce your personal touch, deliver any message or generate a special atmosphere via hearing as opposed to the viewing experience most people assume to find. The words, the melodies and the rhythm that you want to promote may supplement your written content, accessing the users' brains and hearts basically without being recognized. An audio plugin allows you to exhibit spectacular presentations, guided by menus and playlists that produce eye-catching appearance, which captures the people and turns the site even more fascinating to observe. One other helpful benefit of the audio plugin is the Search Engine Optimization value it provides. Search engines list the text connected to the audio player, including headline and description and a few of them even include distinct search sections for music and podcast, thanks to the high interest. Another factor that may give a boost to your search results is the audience responses in the shape of comments, conversations and return website visitors. There are a few companies that specialize in rich media products and services. Those businesses create designated software with which you can effortlessly create your very own widgets, like video galleries, podcast or a website music player. Those media platforms do most of the work automatically; they design the players' layout, make alterations, transcoding, manage hosting and delivery including all protection means and even documentation, assigning you with only a few uncomplicated tasks you need to do before you can savor the outcome of your audio plugin. First of all you must either come up with or locate the media files, you would like to display on your webpages. You receive several customization options you need to set up to match your preference and demands and most essentially, you must download an eligible audio plugin or extension that relates the method, which your web-site is built upon, such as HTML or diverse CMS including Joomla, WordPress, Drupal, Ning, TypePad and so on. Downloading an audio plugin is a fast and easy work. You only should comply with the descriptive guidelines, and you are fixed; no special abilities are involved. Downloading an audio plugin is a one-time job that should not take more than a few moments. The biggest surprise involved in this process is that the audio plugin is generally a free solution, and some media platforms even provide their remaining product and services, including the website music player, with no fee at all. Explore a number of media platforms to compare the services they provide, the prices and reliability, and start making your audio playlist. Install an audio plugin to create your own website music player. Doing so, you will engage your visitors with a stunning appearance, additional content, you will get SEO boost and bring a special personal touch. Cincopa media platform audio plugin is fast, simple and free!

Ethernet cables are used to connect network devices such as routers, adapters, and modems. They transmit information using the Ethernet protocol. Equipment connected to an Ethernet cable is referred to as wired device. Wireless devices use radio waves instead of Ethernet cables. Some network devices use both wireless and Ethernet connections and these types of networks are usually referred to as just wireless networks. An network lead has eight color-coded wires. These eight wires are twisted and grouped as four pairs of wires, and each pair has a common color theme. The purpose of these twists is to counteract interference and noise. You can wire your own leads. These are very simple to do. Many people have no idea that they can do their own wiring of leads and connectors. If you have a basic knowledge of an Ethernet cable, the various types of jacks and plugs that are available, and how to make use of a few different small tools, then you can handle this project at home. The materials you need to construct an Ethernet cable can be easily obtained at many computer stores or home or electrical centers. Once you have obtained the needed supplies and tools, you can begin to wire your lead. It is important to follow standard wiring procedure in order to achieve proper performance. Although many standards are available when it comes to wiring, straight-through procedure is the most popular of them all. There are 8-position modular connectors called RJ45 plugs and these have similar look to a widened phone plug. They are available various styles, and it's important that you know which one you will need to use. RJ45 jacks are only compatible with solid type leads. Additionally, most jacks are made for T568A, T568B, or sometimes both. Be sure you use the correct one. Typically, all fixed wiring follow the straight through procedure. The reason is because straight through is the most versatile, because of the fact that many Ethernet interfaces often cross and un-cross as needed. Wiring a Fixed Ethernet Cable can be done in the following way. Determine the length of the Ethernet cable you want to make. Be sure it is longer than the desired length. Grab one end and cut the wire to length. Make sure to leave enough length that gives you adequate material to work with. Grab the end of the cable and strip off about 2 inches of the plastic. Align the colored wires according to the lay out of the jack. Now with the punch down tool all you need to do is insert the wires into the jack, one at a time. Follow these steps for the other RJ45 jack.

In thick film power resistor design material selection is critical to ensure the resistor can both dissipate the required amount of heat and retain a stable resistance over time. Important issues to consider in thick film resistor design include: • Resistor tolerance • Temperature coefficient of resistance • Resistance drift • Power rating Often the power rating and resistance drift are the most important but all are related to the appropriate choice of materials. For example the power rating and temperature coefficient of resistance are largely dependent on the choice of substrate material. Whereas resistance drift is more related to the resistor paste and processing. No single substrate material is an ideal choice which satisfies all the important properties of thick film substrates. The choice of substrate material is therefore often related to the electrical, thermal and mechanical demands of the application. An ideal thick film substrate should have: • Low dielectric constant • Good dimensional stability during processing • Good adhesion between substrate and printed materials • High thermal conductivity • A thermal coefficient of expansion matching other materials in the circuit • High electrical resistivity Alumina is a common choice which satisfies the majority of the above requirements in most applications however it is brittle and can snap (especially with large substrates), shaping can also often be an issue. For very high power dissipation Aluminium Nitride is often used as it has >5 times the thermal conductivity of Alumina but it is relatively expensive and requires the use of special printing pastes and processing. With the substrate material established the resistor material should be defined. Resistor materials are applied in paste form by screen printing and are then fired by heating to a high temperature. Resistor pastes have three main ingredients: • The functional elements (metal alloy or oxide particles) • Binder (glass particles) • Organic solvents and temporary binder The temporary binders give control over the printing process. They evaporate early in the firing process together with the solvents. The glass particles melt in the firing process, bind the active particles together, adhere to the substrate and provide stability to the circuit. The design of a thick film power resistor therefore requires a thorough understanding of the requirements of the application, available materials and processing technology. There is no perfect substrate or resistor material so appropriate design often requires a number of compromises. Cost is also a key consideration as materials with the best performance can come at a considerable cost.

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