A breadboard is used to build electronic circuits without soldering anything. The breadboard has various spring-loaded connecting strips and an electronic circuit is then constructed by plugging in electronic components into the breadboard. Additional connections can then be made with Breadboard Jumper Wires that also plugs into the breadboard.
The breadboard is configured in two blocks of 5 x 63 holes separated by a trench in the middle. The breadboard also has 4 horizontal rails two at the top and another two at the bottom. The blue rails are for the negative voltage (0V) and the red rails are for the positive voltage (+5V).
Underneath the holes are spring-loaded connectors that grab the components and wires when they are plugged into the breadboard. Each column of holes are also numbered from a to e for the bottom block and f to i for the second block. For column number 1 the holes a, b, c, d and e are connected on one side and holes f, g, h, i and j are connected on the other side. See the picture for clarification.
IC’s (PICAXE 18M2) and switches are plugged in over the trench with one set of legs connected to the upper block and other set of legs to the bottom block. This ensures that the IC pins are not shorted out and one can then construct a circuit very easily.
The picture below shows how the PICAXE IC is plugged in over the trench with the two resistors for the programming interface. The use of breadboard jumper wires to complete the circuit is also shown.