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23 May 2014

sillyputtymaby elektor.com

Surely everyone remembers their first encounter with silly putty. Knead it into a sphere and it becomes a super bouncy ball, hit it hard and it shatters into pieces that slowly flow together again. Originally developed during the Second World War as a possible substitute for rubber, it is a curiosity, a solution looking for a problem…A team of researchers at the University of California, Riverside Bourns College of Engineering have discovered that the same material can be used in lithium-ion batteries to give them three times the energy storage of a standard cell.

In a paper entitled ‘Stable Cycling of SiO2 Nanotubes as High-Performance Anodes for Lithium-Ion Batteries’ published online in the journal Nature Scientific Reports, the research team describe how using silicon dioxide nanotune anodes in Lithium-ion batteries produced a cell with over three times as much energy storage as a standard Li-ion cell which uses carbon-based anodes. They also found that the silicon dioxide nanotubes remain extremely stable in the battery environment giving the battery a long lifespan. Early results showed no loss of capacity after 100 recharge cycles and the team are confident that it can be cycled many hundreds more times.

Silly Putty boosts Li-ion Energy Density - [Link]

23 May 2014

Keep losing things? Want to share & track belongings with friends? Locate bags/keys in an instant?

The FIND is the best track & find tag which can be used to reliably prevent losing or misplacing belongings like keys, bags, pets, laptops, phones etc.

FIND V2.0 – Never lose anything! Share or track via App - [Link]

23 May 2014

3D_rendering_2_th

This project is a development board for Atmel ATmega64 microcontroller and can be used to easily develop custom AVR firmware or as an introduction board to microprocessors and programming. A development board is better to be used instead of a breadboard setup as it facilitates the connection of the different components using PCB headers. The project was designed at the time when the Arduino board wasn’t available in the Czech Republic and is equipped with different modules.

ATmega64 Development Board - [Link]

22 May 2014

appliedmater

by Nancy Owano:

When a global leader in providing equipment, services and software used for manufacturing semiconductors makes an announcement, industry players sit up and listen, as the technologies are going to impact market activity in devices such as smartphones, flat screen TVs and solar panels. Tuesday’s announcement from Applied Materials was big. The Santa Clara, California based equipment supplier announced the launch of its Endura Volta CVD Cobalt chip making machine. This is the only tool capable of encapsulating copper interconnects in logic chips beyond the 28nm node by depositing precise, thin cobalt films, said the company.

Applied Materials sets cobalt on path to future chips - [Link]


22 May 2014

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ICStation @ instructables.com writes:

ICStation team introduce you how to DIY this temperature & humidity & smoke alarm system based on ICStation Mega 2560 compatible with Arduino.The working voltage of this system is DC5V.It can measure the current temperature, humidity and smoke. It can display real-time data by the 1602 LCD and can realize the sound and light alarm when in the dangerous temperature and humidity. It is a simply and easily to operate monitoring alarm system about temperature humidity and smoke.

DIY Temperature & Humidity & Smoke Detector - [Link]

22 May 2014

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singingshark @ instructables.com writes:

Welcome! For our Environmental Capstone class (senior thesis) for St. Olaf College we built a monitor that would effectively monitor how much water a shower uses. For our project we made four different monitors using the same process. This instructable is written as if you were to make a single water monitor. [...]

Shower Monitor Arduino with LCD display - [Link]

22 May 2014

temperature-logger-circuit

praveen @ circuitstoday.com posted a project on a Temperature logger using Arduino:

This project is about a simple USB temperature logging system using arduino uno and the serial monitor function in the arduino IDE. The system monitors the temperature every 2 seconds and shows it on the arduino serial monitor. The temperature is shown in °Celsius and °Fahrenheit. The system is interfaced to the PC through the USB port. LM35 is used as the temperature sensor.

LM35 is three terminal linear temperature sensor from National semiconductors. It can measure temperature from-55c to +150C. The voltage output of the LM35 increases 10mV per degree Celsius rise in temperature. LM35 can be operated from a 5V supply and the stand by current is less than 60uA. The pin out of LM35 is shown in the figure below.

Temperature logger using Arduino - [Link]

22 May 2014

Print

By Panasonic

Capacitors may seem simple enough, but specifying them has actually grown more complex in recent years. The reason why comes down to freedom of choice. The universe of capacitors has expanded greatly over the past few years, in large part because of capacitor designs that take advantage of advances in conductive polymers.

These advanced capacitors sometimes use conductive polymers to form the entire electrolyte; or the conductive polymers can be used in conjunction with a liquid electrolyte in a design known as a hybrid capacitor. Either way, these polymer-based capacitors offer a performance edge over conventional electrolytic and ceramic capacitors. [...]

The various polymer and hybrid capacitors have distinct sweet spots in terms of their ideal voltages, frequency characteristics, environmental conditions, and other application requirements. In this article, we will show you how to identify the best uses for each type of advanced capacitor. We will also highlight specific applications in which a polymer or hybrid capacitor will outperform traditional electrolytic or ceramic capacitors.

Understanding Polymer and Hybrid Capacitors - [Link]

22 May 2014

article-2014may-dcdc-converter-topologies-fig1

By Ashok Bindra:

Whether it is used for biasing avalanche photodiodes (APDs) found in optical receivers, driving photoflash tubes in flash cameras, or charging high-voltage capacitors, the need for high-voltage sources continues to grow. Consequently, in battery-powered units where the input supply voltage is low, step-up or boost DC/DC converters are required to generate voltages that can be several times the input. To address these requirements, suppliers such as Analog Devices, Linear Technology, Maxim Integrated, and Micrel Inc., among others, have produced boost converters with output voltages at 70 V and above.

DC/DC Converter Topologies and Techniques to Obtain High Boost Ratios - [Link]

22 May 2014

homemade_pickup_winder_02-600x450

A DIY guitar pickup winding machine built on ATmega8 by Davide Gironi:

A pickup winding machine it is used to wind a guitar pickup.
The core of this project is an ATmega8.
It features:
wind counter
slow startup
automatic stop
configurable motor speed
configurable winds
2 directions

This winder has an LCD display that will show
the current motor direction
the rotating speed of your pickup
the total and current wind counter

[via]

A pickup winding machine built on an ATmega8 - [Link]



 
 
 

 

 

 

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