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Sunday, May 9, 2010

How breadboard can connect electronics components?

A breadboard is a construction base for a electronics circuit or a prototype design.Now bread board is commonly used to refer solder less breadboard and plug board.It does not require soldering, so it is reusable for a long period. Due to this specification, now a days a variety of electronics systems may be prototyped by using breadboards, from small hobby circuits to complete central processing units. So familiarize with breadboard is important for all electronics hobbyist.
we consider the father of modern breadboard as Ronald J Portugal of EI instruments who design the now common, classic, usually white, plastic solder less breadboard in 1971.

A modern solder less breadboard consist of a perforated block of plastic with numerous tin plated phosphor bronze or nickel silver alloy spring clips under the perforations. The spacing between the lead pitch is typically
2.54mm. ICs in DIP package can be inserted to the adjacent holes in center line of block. Connecting wires and other components leads can be inserted in to the free remaining holes to complete the circuit. Typically power ratings of spring clips are 1 ampere at 5 volts and 0.333 at 15 volts.

Inside the breadboard
Now solder less breadboard is manufactured by various electronics tool makers. But normally all of them follow the same method and same specification. In the breadboard, we can see two type of areas, called strips. The strips consist of  interconnected electrical terminals. The two type strips in the solder less breadboard are
  • Bus strips
  • Terminal strips

Bus strip
They are used to connect supply voltage for the circuit in the bread board. A bus strip in a breadboard usually contain two columns, one for supply voltage and one for ground connection. Typically the column intended for
supply voltage is colored with red and column for ground is colored as green,blue or black. In some bread board all terminals in a column are electrically connected. Otherwise One column is divided in two groups.
The consecutive terminals in a group is connected electrically and the next group is electrically disconnected with the first group. This design decrease the crosstalk effect on power supply bus.

Some breadboard contain separate bus and terminal strips. Others just provide block which contain both bus and terminal strips. The first is more useful one. In this type of breadboard, we can extend the size by clipping more strips together.

Terminal strips
        The terminal strip is the main area used to hold all electronics components in a breadboard. In the middle of terminal strip of a breadboard, one typically see a notch running in parallel to the long side. The notch in the terminal strips perform some functions in a breadboard. The notch is mainly used to indicate the center of terminal strips and it provide some cooling in to the DIP package ICs .
  DIP ic in a bread board
Typically we can find five holes in a row at left and right side of notch. The two sides are electrically disconnected and five holes in a row in each side are electrically connected to others. Also the rows in each side are not connected. The five columns on the left of notch are commonly marked as A, B, C, D and E and five columns in right of notch is marked as F, G, H, I and J.

Connecting wires
One of the most important component in a electronic circuit connected in a breadboard is  connecting wires. We cant imagine a breadboard without some connecting wires.Connecting wires for breadboard can be obtained in the form of ready to use jump wires and manually manufactured connecting wires. Ready to use jump wires can be get in various quality. But it coast is an important for a hobbyist. So try to use single strip connecting wires as jump wires.

 Inside the Bus strip
What you can feel about the above figure? It is the inner view of a bus strip in a solder less breadboard.

Last view about solder less breadboard
Now i upload a figure to end all doubts about breadboard. After the last view you are ready to connect a circuit in a breadboard. So we can end this theory.
Now what is your concept about solder less breadboard. Just look the below  one and stop it.
From this drawing, you can finish this searching...
How we can connect circuits in  Breadboard
 Now you have much knowledge about solder less breadboard. Try to read the above details with keep your breadboard in your hand. Now you can see Bus strip and Terminal strip in your breadboard.

How i split a VCC from a solder less breadboard?.
It is interesting, just connect your supply in to two holes of different column of bus strip area. Then take power from holes in the same column. Now you split power from bus strip area. Also splitting of signal is possible in terminal strip area. For this purpose, you must connect supply line or signal line in any two different rows of terminal strip area. Then take output from the same rows. It is simple...

Now i shows  some good quality circuits that is powered using solder less breadboard. Just keep in mind that your circuits output is always depend with its assembling. So to get output in minimum time, improve your breadboard practice..

 Problems associated with solder less breadboard
Due to stray capacitance, high inductance of some connections and relatively high resistance, solder less breadboard is limited to operate at low frequencies, usually less than 10 MHz.
Also solder less breadboard have some voltage and current limitation. It has a certain power ratings.
Also breadboard is not a way to connect surface mount technology devices.
Complex circuits can become unmanageable in solder less breadboard due to large amount of wiring.


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