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 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