Mad Of Science: battery

Showing posts with label battery. Show all posts

My Own Idea To Try

Posted by rajascientist Tuesday, September 22, 2009 0 comments

Free Road Side Lighting :

Have you ever noticed a lot of wind energy is produced and wasted , as a vehicle pass by you along the high way. These wind energy produced throughout the day can be used effectively to generate power. These power can be used for lighting road side lights.

Placing small wind turbine along the road will generate power, enough wind will be produced by vehicle passing by. These turbines can be placed along the road side or at the platform separating two lanes. Thousand of vehicle pass by every day and plenty of artificial wind is produced.

Wind Turbine For Vehicle:

Another idea is placing a small turbine above or at the front of the vehicle . As the vehicle moves these turbines can be used to generate power ,enough to charge a battery .Once fully charged this can be used to run the car. Alternate battery can be charged at the same time.Hence a complete electric car ,without any wastage of time in charging the battery can be obtained.

For additional power the body of car can be coated with solar cell.

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SIMPLE ELECTRIC BELL

Posted by rajascientist Tuesday, September 1, 2009 3 comments

You might have all came across many electric bells using electromagnet ,this is yet another one with slight modification , a home made electric bell.

Materials Required:

Gong ( toy car )
Hammer (battery cover sheet)
Electromagnet ( Picture tube coil)
9 V battery
Simple Switch Mechanism.(hanging wire)
Pole Supporting Hammer ( pen refill)

Electromagnet:

When electric current passes through a coil wound on a soft iron core ,iron acts as a temporary magnet. It acts as a magnet until current passes through it. I got this electromagnet from junk TV picture tube, works perfectly.

More the number of turns ,more the applied voltage the strength of electromagnet will increase.

Gong :

Look for it in some toy cars ,or else take some tensile metal .

Hammer:

Do it yourself. I made one out of a battery cover metal sheet.

Simple Switch Mechanism:

It is the switch mechanism which varies from bell to bell. It depends upon creativity of creator. Many types mechanism are available. I have used hanging type switch. Nothing but a simple strip of wire hanging down touching the hammer.

Whenever the hammer is pulled and released , the circuit opens and closes.

Pole:

A small pole is erected near the electromagnet , bearing spring and holding hammer. I used a pen refill as a pole and a spring around the refill. Which gives the necessary tension to the hammer.

This is how it works . The speed of the hammer can be increased by increasing the power of electromagnet .

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HUMAN AS A BATTERY

Posted by rajascientist Monday, August 3, 2009 0 comments

Electrical impulses in the heart originate in the sinoatrial node and travel through the intrinsic conducting system to the heart muscle.The impulses stimulate the myocardial muscle fibres to contract and thus induce systole. The electrical waves can be measured at selectively placed electrodes (electrical contacts) on the skin.

These small electrical signals can be measured using a multimeter. Adjusting the multimeter to 200 or 2000mv dc the electrical signal produced can be measured. The strength of this signal vary from point to point ,that can be understood by touching multimeter electrode at different places on our skin.

When i measured my own body signals i got around 125 mv sometimes, suddenly i an idea flashed me i thought of amplifying this voltage to produce around 1 volt so that i can light some small bulb.

So now how to amplify , thought for a while then one thing struk my mind thats the voltage multiplier .

A voltage multiplier is an electrical circuit that converts AC electrical power from a lower voltage to a higher DC voltage by means of capacitors and diodes combined into a network. Voltage multipliers can be used to generate bias voltages of a few volts or tens of volts or millions of volts for purposes such as high-energy physics experiments and lightning safety testing.

The above circuit is an example of typical voltage quadrupler a type of voltage multiplier,

I used around 10 capacitors and diodes that is output volt is 10 times the input voltage. The circuit is in process I will tell u later whether I succeeded in lighting a small bulb.

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PEE POWER: URINE TO FUEL CARS

Posted by rajascientist Wednesday, July 8, 2009 0 comments

Before you next flush the toilet, consider this: Scientists in Singapore have developed a battery powered by urine.

Researchers at the Institute of Bioengineering and Nanotechnology created the credit card-size battery as a disposable power source for medical test kits.

Urine Power
To make the battery, Lee and his colleagues soaked a piece of paper in a solution of copper chloride and sandwiched it between strips of magnesium and copper. This sandwich was then laminated between two sheets of transparent plastic.
When a drop of urine is added to the paper through a slit in the plastic, a chemical reaction takes place that produces electricity, Lee said.
The prototype battery produced about 1.5 volts, the same as a standard AA battery, and runs for about 90 minutes. Researchers said the power, voltage, and lifetime of the battery can be improved by adjusting the geometry and materials used.

Scientist have combined refuelling your car and relieving yourself by creating a new catalyst that can extract hydrogen from urine

The catalyst could not only fuel the hydrogen-powered cars of the future, but could also help clean up municipal wastewater, physorg.com reported on Monday.

Gerardine Botte of Ohio University uses an electrolytic approach to produce hydrogen from urine — the most abundant waste on earth — at a fraction of the cost of producing hydrogen from water.

Urine’s major constituent is urea, which incorporates four hydrogen atoms per molecule — importantly, less tightly bonded than the hydrogen atoms in water molecules.

Botte uses electrolysis to break the molecule apart, developing an inexpensive nickel-based electrode to efficiently oxidise the urea.

To break the molecule down, a voltage of 0.37V needs to be applied across the cell, which is much less than the 1.23V needed to split water.

“During the electrochemical process the urea gets adsorbed on to the nickel electrode surface, which passes the electrons needed to break up the molecule,” Botte told Chemistry World journal.

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