The future of transportation may find travelers flying on vehicles that have no wings. Magnetically levitated trains, which use the attracting and repelling forces of magnets, jet through the air just millimeters off a specialized track-some at speeds of 550 kilometers per hour. Maglevs are quieter and consume less energy than trains with wheels that touch the track.
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1. Magnetically Levitated Trains (Maglev)
In Password Based Door Locking only authorized persons to access a restricted area. The system is fully controlled by the 8 bit microcontroller AT89C2051 which has a 2Kbytes of ROM for the program memory. The password is stored in the EPROM so that we can change it at any time.
The default password is 1111 and you can change the password by dialing 1234, old password, new password #button. for example if you want to change the password from the default to 4523 then dial 123411114523# after dialing you can hear a beep sound which confirm the operation goes successful.
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1. Project report on Password Based Door Locking System
A night vision device (NVD) is an optical instalment that allows images to be produced in levels of light approaching total darkness. They are most often used by the military and law enforcement agencies, but are available to civilian users. The term usually refers to a complete unit, including an image intensifier tube, a protective and generally water-resistant housing, and some type of mounting system.
Many NVDs also include sacrificial lenses, IR illuminators, and telescopic lenses. NVDs are mounted appropriately for their specific purpose, with more general- purpose devices having more mounting options. For instance, the AN/PVS-14 is a monocular night vision device in use with the US military as well as by civilians.
It may be mounted on the user’s head for hands free use with a harness or helmet attachment, either as a monocular device, or in aligned pairs for binocular “night vision goggles” which provide a degree of depth perception as do optical binoculars. The AN/PVS-14 may also be attached to a rifle using a Picatinny rail, in front of an existing telescopic or red dot sight, or attached to a single-lens reflex camera.
Other systems, such as the AN/PVS-22 or Universal Night Sight, are designed for a specific purpose, integrating an image intensifier into, for example, a telescopic sight, resulting in a smaller and lighter but less versatile system.
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1. Night Vision Techonology
2. NIGHT VISION TECHNOLOGY
Electronics Engineering | Admin November 29, 2009 | 
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