How to Read a Breadboard: A Beginner's Wiring Guide

A breadboard lets you build circuits with no soldering — just push components in. But those rows of holes confuse everyone at first. Here's the simple rule that unlocks it.

The two zones

• Power rails (the long lines marked + and − down the sides) — every hole in a rail is connected along its length. Use these for power and ground.
• The main grid (the middle) — holes are connected in short rows, across the gap. Each row of five is one connection point.

The golden rule

In the middle section, holes are joined in columns of five across the centre channel — not along the length. The channel down the middle splits the two halves, which is exactly what lets you straddle a chip across it.

Wiring your first circuit

1. Run power from your board to the + rail and ground to the − rail.
2. Place your component so its legs sit in different rows.
3. Use jumper wires to connect rows to the power rails and to your board's pins.

The #1 beginner mistake: putting both legs of a component in the same row — which shorts it out. Keep legs in separate rows and you're golden.

Every Compoden starter kit includes breadboards, jumper wires, and a guide that walks you through your first builds. Need just the parts? See Components. Wiring question mid-build? Ask VoltIQ.