Simple Motor In Seconds

Hi! this is a small project for the kids, it very simple and will cost you zero.
With that it will help you to understand how the motors work.

You just need this four things
(1):An wire of about 5-6 inch (you can get it from scrap in your house).
(2):A magnet round magnet is the one which i prefer. (you can get it from an small speaker)
(3):1.5v Battery cell (you can take out remote battery for few minutes)
(4):A iron nail (any size will do)

OK Now we have get what we want.

Let's start.

Attach the strong magnet to the clean iron nail on head.

Combine this assembly with the battery on its positive side (Nail tip pointing towards battery)

Now take the copper wire and connect it to the 1.5v Battery on its negative side & touch the other end to the magnet.

Now the magnet and the nail will start spinning.
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A Simple Emergency Battery In just 5 minutes.

Many a times in our life, there will be a need of emergency battery so get ready for that day.
As well as this is a very good school project. It is very simple trick, you just have to gather some 4-5 stuff's and get started

Things needed :

1) A paper

2) 4-5 coins of copper.


3) Aluminium foil from lunch box

4) Some cotton.

5) Lemon.

O.K Now as u have all the things u are ready to make a battery.

1) Then roll up the paper in such a diameter that coins fit in.

2) Tape up the aluminium foil on one side of the paper.

3) Make aluminium chunks of same size as that of the coin.

4) First of all take out some lemon juice from the lemon by squeezing it.

5) Also make same size of pieces of cotton .

6) Now dip all the cotton pieces in an liquid (i.e: lemon juice).

7) Now u have an cylinder made of an paper start filling it, first an cotton piece, then the coin and then the aluminium foil chunk.

Repeat the 7th step till the paper cylinder is filled, at last u must have copper coin.

After all the assembly your result should look like this

U can check the battery voltage by an multimeter, my project output was about 1.5volt

Hope u have like this, if any doubt please comment.
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Folder lock in windows

Hi! guys i am going to show how to lock Folder.
We can use this trick for privacy in our system.
Without using a folder lock software

The trick for the folder lock is very easy, just go through the steps below:

• First of all select a folder you want to lock.
• Now right click on the drive and select >>New>>Text Document.(Notepad will Open)
• Now paste the below code {first code in red}in that text document, 

Suppose you want to lock the folder "Demo" in I drive. Thus, u can observe in the code below you can see the word Demo which is nothing but the folder name and then replace the name of ur folder here.

Step1

• ren Demo Demo.{21EC2020-3AEA-1069-A2DD-08002B30309D} 
• Now save this text file as lock.bat (or Rename it)
• you should save this text fie in the same drive in which your folder is.

 Step2

• Now, again open the notepad.
• Type.
  ren Demo.{21EC2020-3AEA-1069-A2DD-08002B30309D} Demo 
• Save this text file as open.bat in the same drive.

1. Now whenever you double click the file "lock.bat" your folder Demo will become control panel. And nobody can view your folder.

1. Now to get your folder back just double click "open.bat", and you will get your folder back.

click here to know how to Backup Registry
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Backing Up the Registry and Registry restore

If you’re planning on messing with your Windows Registry, it’s probably a good idea to backup it first!
I will show you how to backup registry

Click Start /Run and type in “regedit” (no quotes). (If you’re in Windows Vista or 7, just type it into the search box.)
Next, click the File menu, then ” Export“.

Select a location from the resulting box and give your backup registry a name. Something like:
Regbackup 10-21-2010.

Just a quick note: 

• By default, Windows backs up the registry when you shut down your machine. The above is probably best used for those (like myself) who like to tinker with registry settings.
• Now, how to restore the registry you just backed up… 
• First, if Windows gets an error when loading your registry, it will automatically revert to its backup, so it should never give you any kind of trouble loading.
• OK, but what do you do if you’ve been playing around in your registry and have *really* messed stuff up?
• Don't worry, "Registry restore" is the solution"
• Click the Registry menu (in the Registry Editor) and select Import Registry . Then just point the computer to your back up file. And it is done.

If any problem please comment.

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Resistor Series and Parallel calculations

RESISTOR (Ω)

           Resistor is the most commonly used in electronic devices. The main function of resistors is to oppose the flow of current. Both current AC and DC are equally opposed.  Resistors also provide a desired voltage drop.

Resistor color code calculation trick click here

SYMBOL :  

 

The unit of resistor is ohm (Ω).  The larger value of the resistor is in kilo ohms (KΩ) and In mega ohms (MΩ)

                Ohms                     =              1                             

                Kilo Ohms             =              10 ³         = 10×10×10                         = 1000 ohms

                Mega Ohms          =              10 ⁶         = 10×10×10×10×10×10     = 1000000 ohms

               

                1000 ohms            =              1 kilo ohms

                1000 kilo ohms    =              1 mega ohms

TYPE OF RESISTORS

Fixed Resistors & Variable Resistors

A) Fixed Resistor

a) Carbon Resistor            

           The value of these resistor is represented by the color code printed on it.  They are available in different wattage (Power) from 1/4 watt, 1/2 watt, 1watt and 2 watt.  They are used in all electronic devices.  The values of resistors are from ohm to mega ohms.

b) Wire wound Resistors

           The value of these resistors along with wattage is printed on the body of the resistors. They are available in different colors like Red, white, green, black, brown, violet, etc.  They are used in high voltage power supply.  They are also called as low value high wattage resistance. They are available wattages from 2.5w, 5w, 10e, 20w and 40w etc. 

2) Variable Resistors

                These resistors are also called as Potentio-meter or (POT).  They are used in radio, T.V. Tape-Recorders as a volume control or Tone Control. Sometimes these controls are attached with on/off Switch to control power.

Resistor's value is determined by the color code on them, to know How to calculate the resistor value click here

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Decoding Resistor Color Codes

Resistor: What actually did you mean by the resistor? (Resistor are the electronics component which are used to resist the flow of current or voltage in an electrical circuits.)
They are used in every electronics circuit.

So every resistor has its own value, printed in the form of color on it. Every color indicate one value and we have to decode it. In this post i am going to show you how to decode the resistor color code.

The image given below is of resistor, u can note the color on it.

This color are nothing but its resistance, this color will help to calculate the resistance.


Figure 1

Resistor

Table 1 Resistor Color Coding

                         

Color	1st Digit	2nd Digit	Multiplier	Tolerance
Black	0	0	1	+20%
Brown	1	1	10	+1%
Red	2	2	100	+2%
Orange	3	3	1,000	+3%
Yellow	4	4	10,000	+4%
Green	5	5	100,000	n/a
Blue	6	6	1,000,000	n/a
Violet	7	7	10,000,000	n/a
Gray	8	8	100,000,000	n/a
White	9	9	n/a	n/a
Gold			0.1	+5%
Silver			0.01	+10%

Referring to Table 1 and Figure 1, 

                Red represents 2 and Blue stands for 6, so the significant digits of a resistor with a Red-Blue-Green-Gold band scheme are 26. The third band indicates the multiplier, in this example that band is Green, so the value is 100,000. Multiply 26 by 100,000 and you get 2600000 ohms. You express values over 1000 ohms as 1 K-ohms and 1000 K-ohms as 1 M-ohms, so you say that the above resistor has a value of 2.6M-ohm.

And at last the Gold color indicate tolerance rate (for example, +5-percent tolerance means the resistor value may vary plus or minus 5 percent from the stated value).

Convertion Table:

1] 1 Mega ohms = 1000 Kilo ohms.

2] 1 Kilo ohms   = 1000 Ohms.

Any doubt about this topic, please post a comment.
And don't forget to follow the blog to keep in touch.


KNOW MORE ABOUT RESISTOR

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Ohm's Law

Let's say that you’re wiring a circuit. You know the amount of current that the component can withstand without blowing up and how much voltage the power source applies. So you have to come up with an amount of resistance that keeps the current below the blowing-up level.

In the early 1800s, George Ohm published an equation called Ohm’s Law that allows you to make this calculation. Ohm’s Law states that the voltage equals to the current multiplied by resistance, or in standard mathematical notation,
V = I x R

So, here’s how you calculate current: current equals Voltage divided by Resistance, or
I = V / R

You can also rearrange Ohm’s Law so that you can calculate Resistance if you know voltage and current. So, resistance equals voltage divided by current, or
R = V / I



Now, take a specific example using a circuit with a 12-volt battery and a light bulb (basically, a big flashlight). Before installing the battery, you measure the resistance of the circuit with a multimeter and find that it’s 9
ohms. Here’s the formula to calculate the current:
I = V / R
  = 12volts / 9 ohms
  =1.3 amps

If you find that your light is too bright? A lower current reduces the brightness of the light, so just add a resistor to lower the current. Originally, we had 9 ohms; adding a 5-ohm resistor to the circuit makes the total resistance 14 ohms. In this case, the formula for current is
I = V / R
  = 12volts / 14 ohms
  =0.9 amps

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Rectifier

Rectifier is a electrical device which is used to convert AC(Alternating current) current source to DC(Direct current) current source.
In this post i will give you some details about rectifier

You can see the picture of an Rectifier, it is one of its kind.

This is the internal diagram of Rectifier about where to connect the Input(AC) and the Output(DC).

But actually every device is made of some parts, Similarly Rectifier is also made up of Diodes.

In the diagram the silver strip on the diode indicate the cathode end of the diode.
Rectifier also has it other name as Bridge Rectifier,etc
So in order to make this Rectifier we need at least 4 Diode (let's take 1n4007).
Now we have to arrange it in a manner shown in the picture.

Above you can see the diode arrange in some manner and there are 2 AC input with 2 DC output.
Now here the whole diagram is nothing but an rectifier.
So there is an suggestion for the readers that don't waste your money buying an Rectifier just make it at home using some undamaged diode from scrap.

If still you don't understand how to connect it i will show you an example,

In this picture our main supply is connected to the Transformer which drop the voltage level and then it is connected to the Rectifier which gives out DC source, (which is pure DC but it has to be converted into pure source by using filters,etc) but still it can be used as a DC source.

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Light Emitting Diode(LED's)

LED's are the Light Emitting Diode, they are available in different types and with various color such as Red, Green, Blue, White, etc.

 And the other good thing about them is they are easily available in any electrical shop nowadays at a cheap rates (they will cost you approximately 2 rupees per LED)

They work on DC source of 3 volts at there maximum power. They have very long life and are very efficient.



LED's mainly has two point for the connection i.e Cathode and Anode

If you are confused about how to identify which one is cathode and which is anode, then don't worry i will be giving you some cool tips.

In the above figure you can see a single LED having two different sized leg's.
Yes! this is the trick, the shorter leg is the Cathode (-) and the longer leg is the Anode(+).

Sometimes you may get a damaged or a used LED's, there it can be a difficult job to identify the cathode and anode. For that purpose there is an another trick i.e you have to look into LED to identify cathode and the anode. Study the picture below carefully to understand LED.

While viewing into the LED you will see a smaller lead and the bigger lead.
The smaller lead resembles the Anode and the bigger lead resembles the cathode.
Sometimes while using color LED, it is difficult to see inside the LED, there is a flat surface at the base of the LED resembling Cathode. You can see that in the picture naming (cathode index flat).

And if you connect this LED to two 1.5 volt batteries it will glow as in the above figure.
Resistor in connected in series with the LED in order to avoid high voltage from damaging the LED.
Value of the LED depend upon the brightness we need.

To know more about how LED's are colorful click here

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