ElectronicsQUICK REFERENCE
Breadboard
Know which holes connect before troubleshooting your circuit.
01Internal connections
- Terminal strips
- A–E in one numbered row connect together; F–J in that row form a separate group.
- Center gap
- No connection across the trench. Place DIP ICs across it.
- Power rails
- Long +/− side strips often connect vertically; many are split halfway.
02Before power
- Continuity
- With power OFF, meter-test rail segments and uncertain connections.
- Bridge rails
- Connect split segments deliberately; opposite-side rails are not automatically linked.
- Label voltage
- Mark 3.3 V, 5 V and GND clearly when multiple rails are used.
03Common mistakes
- Shorted component
- Both leads in the same connected five-hole group bypass the component.
- Wrong row
- A jumper one row away leaves a circuit open.
- Motor current
- Use proper terminals/wires for high current; breadboards are for low-power prototypes.