How a Live TV Signal was sent from Moon ?

Live television was transmitted from the moon to 3 grounds stations, two in Australia and one in California. The signal was converted to a standard broadcast signal and then sent to Houston, via, satellite, landline or microwave antenna. These graphics show the path of the television feed.

Bottom line is, the video was transmitted to one of the large dishes that the DSN uses, and then re-broadcast to the world using standard worldwide broadcasting methods. Specifically, a format was used called slow scan, which according to Wikipedia:

The SSTV system used in NASA's early Apollo missions transferred ten frames per second with a resolution of 320 frame lines using less bandwidth than a normal TV transmission.

Electrical Wiring Design for your Homes and other places

Electrical Wiring

from figure you can see that how can you make wiring to your homes and other places same principle will work in all type of electrical wiring designs just you have to focus on the diagram as shown blow each part of diagram is showing its proper usage and you can read to make strong concepts about the electrical wiring for more leave your comment we  will reply you within a day http://roleofelectricalengineering.blogspot.com/p/books.html

How to Make Laptop Charger from solar Pane at home easily?

HOW TO make Solar Panel Based Laptop charger at home
today we are gonna to show you that how can you make a solar charger at home easily this is DIY and easy to make just follow steps
you need some things to make it at home
a battery
solar panel of required rating
charger controller
a USB port o connect with you device
Inverter
some switches (optional)
Procedure
first you need to put solar panel at desired place where you can get maximum output from the solar panel then connect charger controller with solar panel in order to control the charging of battery effectively then connect charger controller with the battery after get two connections from battery and connect them with inverter you may also connect output direct to your device from battery but charger is best option and connect all of these parts with wires and finally after the whole assembly your DIY project is ready for use.
for any difficulty post your question in comment box we will soon give you desired response.

Why in high voltage lines electric shock is experienced by Human while not by Birds?

There are many causes of power failures in an electricity network. Examples of these causes include faults at power stations, damage to electric transmission lines, substations or other parts of the distribution system, a short circuit, or the overloading of electricity mains

Most of us have experienced some form of electric "shock," where electricity causes our body to experience pain or trauma. If we are fortunate, the extent of that experience is limited to tingles or jolts of pain from static electricity buildup discharging through our bodies. When we are working around electric circuits capable of delivering high power to loads, electric shock becomes a much more serious issue, and pain is the least significant result of shock.

How to make small generator model at home easily ?

easy to make small generator at easily without any problem just follow these steps .
Required components
1) copper wire to make a coil
2) small magnets
3)a piece of wood to make supports
4)small shaft
5) LED
Procedure
make walls and stand to assemble generator easily make wholes to fil shaft in the frame then make a small coil with the copper wire  and fix magnets on the shaft and finally connect the LED with the coil now rotate the and you will see that LED is glowing .
Make it at home easily if you feel any difficulty comment your problem below this post you will soon receive our reply within few hours .  

How Refrigerator Works ? what is working Principle of refrigerator ?

Today we are gonna to show you how refrigerator works and what is the basic principle just read carefully this artical
we know that refrigerator contain a gas named as Tetrafluoroethane which starts from compressor . compressor compress it and it will become liquid and its temperature increases due to compression then it goes to outsider fan which reduces the temperature of this liquid and then transfer into internal part of Refrigerator where it expands which the help of nozzles and then remaining liquid goes to condenser and then go to the compressor a=in this way a cycle completes 

How to Control Home appliances through Ethernet or Wifi easily at Home.

How to control home appliances with an internet or WIFI easily just you need following things and have some knowledge about the electronic components
Mobile , Laptop , Desktop these devices amy used to control the appliances with wifi or ethernet
when you give command through these devices first of all your input goes to wifi router  request it to send signal to the desired devices then wifi send request to the ethernet connection then ethernet connection which is connect with operating device like aurduino as shown here then aurfuino will send command to the relay board which is connected with your appliances through wires and then relay will operate our home appliances .   

How can we know the working life of electronic/electrical components ? very interesting answer find here

We know that every thing has a particular life time period today we are showing you some components and there time period as you can see in above picture.
LED base on L70 has fifty thousands (50,000) hours and this duration shows the working time of LED when it is glowing . Electrolytic capacitor  we all are familar with electrolytic capacitor so its working life is 10,000 hours or we can say we can run it 1 ear without any rest . PI device it has very very greater then one lac hours or (100,000), similarly other semiconductors have greater then 100,000 and ceramic capacitors which is not provided by the manufacturers

How memory Card Works in your devices ? what is principle of operation?

Above picture shows the pin out of a memory card which we use in our digital devices. here is a short points about the concept of memory card.
Pin no 1- named as DATA2 but it sends data signal 1
pin no 2- named as DATA3 but it sends data signal 2
pin no 3- CMD I/O means sends commands for Input and output .
pin no 4- named as GND and supplies ground or negative voltage to this component.
pin no 5-named as VDD and supplies positive voltage to this component
pin no 6- Named as CLK and provides clock signal to card to execute the instruction to the card for output
pin no 7- named as GND and supplies negative voltage
pin no 8- Named as DATA0 and provides path for data signal 0
pin no 9- Named as DATA1 and provides path for the Data singal 1

how to calculate your electricity bill on your fingure tips? and list of appliances and energy consumed by them.

This chart represents the energy consumption in our homes by appliaces and this is limited list of home appliaces you can find more or if you need the rating of any thing just post the comment you will soon recieve a short meassage by our experts.
This chart shows the appliance name, the power rating in watts, the operating hours per day and last column contains the number of units that will be consumed by that appliance in the whole month from this chart you can easily calculte the electricity bill and you can compare with your orgional electricity bill which is provided by you electric suply company.