Thinnest bulb in the world

Scientists have demonstrated, for the first time, an on-chip visible light source using graphene as a filament. They attached small strips of graphene to metal electrodes, suspended the strips above the substrate, and passed a current through the filaments to cause them to heat up. This was achieved by James Hone’s group at Columbia Engineering, a team of scientists from Columbia University, Seoul National University (SNU), and Korea Research Institute of Standards and Science (KRISS), led by Young Duck Kim, a postdoctoral research scie

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What is a Digital Oscilloscopes??

Oscilloscopes are one of the basic requirement for any individual or firm involved with electronics. An oscilloscope which is also called as scope, is a type of electronic test equipment that allows signal voltages to be viewed, usually as a 2-D graph of one or more electrical potential differences (vertical axis) plotted as a function of time or of some other, voltage (horizontal axis). It is a device with a wide array of uses, but mainly used to measures electrical signals, these signals are then represented in an interpretable

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Now Computation can be done using water droplets

Computers and water typically don't mix,  but in Manu Prakash's lab at Stanford, engineers have developed a computer that operates using the unique physics of moving water droplets.  The computer was made from an idea which struck Prakash when he was just a student. The work combines his expertise in manipulating droplet fluid dynamics with a fundamental element of computer science  an operating clock. "In this work, we finally demonstrate a synchronous, universal droplet logic and control," Prakash said. The droplet computer

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Wearable Tech can be made using Inkjet printers

Researchers have found a new way to use inkjet printing technology to produce electronic circuits made of liquid metal alloys for soft robots and flexible electronics. However, new manufacturing techniques must be developed before soft machines become commercially feasible, said Rebecca Kramer, an assistant professor of mechanical engineering at Purdue University.  "We want to create stretchable electronics that might be compatible with soft machines, such as robots that need to squeeze through small spaces, or wearable

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How to find DC and AC equivalents of BJT amplifier circuit

BJT (Bipolar Junction Transistor) is usually used in transistor circuits for amplification of voltage or current. It operates with both AC and DC voltages. AC signal is the signal which is amplified and the DC voltage is used for biasing of the transistor. Since the the components behave differently for DC and AC signals, therefore different methods are used for the analysis of the circuit. The simplest and most widely used method is using the DC and AC equivalents. In this method the original amplifier circuit is converted to DC and AC equ

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A wearable device that will help the visually impaired avoid collision

The researchers of U.S.A  have created a wearable device that can be used to detect objects around people with peripheral vision, which would help the to walk freely without any collisions.The loss in peripheral vision  occurs due to  retinitis, pigmentosa, glaucoma, or brain injury. These people  often face mobility challenges and increased likelihood of falls and collisions.  As therapeutic vision restoration treatments are still under development, rehabilitation can only be achieved using &nbs

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Stickers that are invisible even to infrared cameras

Squid are the ultimate camouflage artists, blending almost flawlessly with their backgrounds so that unsuspecting prey can't detect them. Squids achieve this feet by using a protein that make them  to blend into the background. Using that protein  scientists have designed "invisibility stickers" that could one day help soldiers disguise themselves, even when sought by enemies with infrared cameras.  The researchers will present their work at the 249th National Meeting & Exposition of the American Ch

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