Breadboards in Prototyping

NOTE: This is the first blog post in a series of blog posts on how to build electronic circuits. If you're at all interested then please subscribe to the RSS feed.

What is a solderless breadboard and why would you want one? Solderless breadboards, or just breadboards for short, are handy little boards that make prototyping significantly easier. You can insert most electronic components as well as add wire to connect these various components. Often you will want to make a more permanent version later (generally called a Printed Circuit Board or PCB), but sometimes you want your project to be easily modifiable or maybe your breadboard is just the right size for your project. Either way breadboards make wiring up, testing, fixing, retesting, and using your very own circuits easy and convenient. > So basically a breadboard is used to make up temporary circuits for testing or to try out an idea. No soldering is required so it is easy to change connections and replace components. Parts will not be damaged so they will be available to re-use afterwards.

Most electronic components in electronic circuits can be interconnected by inserting their leads or terminals into the holes and then making connections through wires where appropriate. The breadboard has strips of metal underneath the board and connect the holes on the top of the board. The metal strips are laid out as shown below. Note that the top and bottom rows of holes are connected horizontally and split in the middle while the remaining holes are connected vertically.

Note how all holes in the selected row are connected together, so the holes in the selected column. The set of connected holes can be called a node:

To interconnect the selected row (node A) and column (node B) a cable going from any hole in the row to any hole in the column is needed:

Now the selected column (node B) and row (node A) are interconnected: