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12 Aug 2011

Nexus Automation Limited is manufacture and marketing robot kits and relevant accessories.This robot kit is a 3 omni wheels drive mobile robot kit, supports programmable in C, C++ and especially developed for hobby, professional and educational use. Includes microcontroller, Ultrasonic Range Finder and motors.


● 3 wheel drive
● Omni wheel
● Aluminum alloy fram
● Capable of rotation and side way
● Includes Ultrasonic sensors
● With Arduino microcontroller and IO expansion board
● Programmable with C, C++

3WD 48mm Omni wheel mobile robot kit - [Link]

12 Aug 2011

The LM25117 is a synchronous buck controller intended for step-down regulator applications from a high voltage or widely varying input supply. The control method is based upon current mode control utilizing an emulated current ramp. Current mode control provides inherent line feed-forward, cycle-by-cycle current limiting and ease of loop compensation. The use of an emulated control ramp reduces noise sensitivity of the pulse-width modulation circuit, allowing reliable control of very small duty cycles necessary in high input voltage applications.

LM5117 / LM25117 — Powerwise Wide Input Range Synchronous Buck Controller with Analog Current Monitor - [Link]

12 Aug 2011

Helping design engineers develop new products through the element14 knode faster and more efficiently, element14 announced an agreement this week with global RTOS leader Micriµm, to provide free evaluation access to the source code for Micriµm’s µC/OS-III Real-Time Kernel. The new solution is downloadable from the Operating Systems and Stacks room in the element14 knode.

µC/OS-III books, compatible evaluation boards, tools and projects, as well as free PDF versions of Micriµm’s book, are all offered through the element14 knode to help ensure that developers evaluating uC/OS-III make the most of the design experience. Licenses are also available for purchase directly from element14 that leverage the full-featured and fully supported industry strength software, helping to simplify the design process and streamline the path from evaluation to production even further! 

element14 knode Now Offers Micriµm’s µC/OS-III Real-Time Kernel Source Code  - [Link]

12 Aug 2011

Here’s an article that presents a rather innovative look at how to spoof magnetic card readers. The spoofer uses an atmega168 connected up to an electromagnet. The article has the source code, hardware schematic and action shots, don’t miss it! [via]

Magnetic Card Spoofer - [Link]

12 Aug 2011

This project/article explains the theory behind building a pair of animatronic eyes by using servo motors and a gimbal system, with the servos controlled by a PIC 18F452. The article includes all the details for making your own animatronic eyes: hardware schematics, PIC firmware and a detailed procedure with many pictures.

Animatronic Eyes - [Link]

12 Aug 2011

A new photovoltaic energy-conversion system developed at MIT can be powered solely by heat, generating electricity with no sunlight at all. While the principle involved is not new, a novel way of engineering the surface of a material to convert heat into precisely tuned wavelengths of light — selected to match the wavelengths that photovoltaic cells can best convert to electricity — makes the new system much more efficient than previous versions.

The key to this fine-tuned light emission, described in the journal Physical Review lies in a material with billions of nanoscale pits etched on its surface. When the material absorbs heat — whether from the sun, a hydrocarbon fuel, a decaying radioisotope or any other source — the pitted surface radiates energy primarily at these carefully chosen wavelengths. [via]

Sun-free photovoltaics - [Link]

12 Aug 2011

For more than 150 years, spark plugs have powered internal combustion engines. Automakers are now one step closer to being able to replace this long-standing technology with laser igniters, which will enable cleaner, more efficient, and more economical vehicles.

In the past, lasers strong enough to ignite an engine’s air-fuel mixtures were too large to fit under an automobile’s hood. At this year’s Conference on Lasers and Electro Optics (CLEO: 2011), held in Baltimore May 1 – 6, researchers from Japan described the first multibeam laser system small enough to screw into an engine’s cylinder head.

Equally significant, the new laser system is made from ceramics, and could be produced inexpensively in large volumes, according to one of the presentation’s authors, Takunori Taira of Japan’s National Institutes of Natural Sciences. [via]

Laser sparks revolution in internal combustion engines - [Link]

4 Aug 2011

As you know, the recently launched element14 knode  is the world’s first design solutions gateway that brings knowledge (KNO) and design engineering (DE) together in one place, giving engineers one interface to a world of design solutions. element14 created the knode to streamline the design process and offer a new platform for peer collaboration.

Now, element14 is inviting electronic enthusiasts and engineers who are registered at the online community to participate in the “Are you in the knode?” challenge to win tech prizes everyday through Oct. 1. Prizes from leading manufacturers, such as Microchip, ST, NXP, Texas Instruments, and Linear Technology, will be given away daily. In addition, all entrants of a daily draw have a chance to win a weekly giveaway, and one grand prize winner will also be chosen from everyone who entered the challenge.

With the development of the knode, element14 is continuing to be a provider of design engineering solutions that go beyond components, giving engineers more tools they need to get their jobs done. We hope you’ll share this information about the challenge with your readers so they can join the fun and utilize all the benefits that the knode and the element14 community have to offer.

element14 Challenge & Prizes-Are you in the knode - [Link]

3 Aug 2011

Today we have repaired the Samsung LCD monitor with model no: 943NW , he come with symptoms that monitor off after 2 seconds.

I opened it and saw that the electrolyte (100uF/400v) cracked, then I replaced the new capacitor, but the problem is still here, the monitor turns off after 2 seconds, I tried the other new CCFL lamps but now shuts down after 30 sec, in that period as the monitor for i felt that the inverter transformer smell the melted plastic.

Repairing LCD Monitor Samsung 943NW – [Link]

3 Aug 2011

Dual color (4 line x 3 column) led, 12 white and 12 blue are intermittently switched controlled by two NPN transistors BC337.  The speed and duty/cycle timing of lighting duration is determined by NE555 oscilator. The number of repetition of sequential lighting of each group of led is determined by 5-stage divide-by-10 Johnson counter with 10 decoded outputs and carry out bit (CD4017).

The intermittent lights from two group of led imitate the police car strobe lights.
The speed of switching off and on of led are continuously regulated by variable trimmer resistor.

24 LED Police Flasher - [Link]





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