Breadboard

Part images

What it is

A solderless breadboard is a reusable prototyping board. The holes are not all separate: hidden metal strips connect groups of holes so parts and wires can share the same electrical node.

How students use it

Students use it as the workbench for almost every first circuit. Put the Pico beside or across the breadboard, add parts into the rows, and use jumper wires to connect power, ground, and signals without soldering.

Pins and power

Breadboard holes are grouped internally; the exact row/rail pattern depends on the board.

Passive part. It carries whatever low-voltage rails and signals you wire into it.

On a common solderless breadboard, each five-hole row on either side of the center gap is connected internally. The long side rails are usually used for power and ground, but some rails are split in the middle. Always verify rail continuity before trusting a long rail.

Voltage and safety

The breadboard does not make a circuit safer by itself. Pico GPIO still needs 3.3V-safe signals.

Power off before moving wires. Keep metal legs from touching across rows by accident.

Common mistakes

Forgetting the center gap, using a split power rail as if it were continuous, putting both legs of a component in the same connected row, and trusting wire colors instead of tracing the actual path.