The breadboard, your workbench
A plastic block of holes that lets you try a circuit without soldering.
A breadboard is a rectangle covered in tiny holes. Each hole has a metal clip inside that grabs whatever you push in. Pull a wire out, push it somewhere else, no permanent damage.
How the holes are connected
The two long red and blue strips along the side are power rails. Every hole in the red strip is joined to every other hole in that strip — same for the blue. That gives you easy + and − rails along the whole board.
In the middle area, holes are connected in short vertical columns of five. That means a part with two legs in the same column is automatically wired together — no jumper needed. But the trench down the middle splits the columns in half so a chip can straddle it.
Now you understand…
- Breadboards let you try circuits without soldering anything.
- Long red/blue rails = + and −.
- Middle columns connect 5 holes in a vertical strip.
- The trench down the middle is for chips like the 555.
You know the workbench. Now learn the two ways to wire parts on it.