A breadboard is the fastest way to test an idea without soldering. No iron, no solder, no permanent decisions. Push a component in, connect it up, see if it works.
But a breadboard has limits. If you don't know them, you'll hit problems that have nothing to do with your circuit.
How it works inside
Under the holes are metal strips that electrically connect groups of holes together. In the centre block, rows are connected horizontally: five holes in a row are linked, but not across the centre gap. That gap is intentional — it fits exactly over the legs of a DIP IC, giving each leg its own row.
The long rows on the sides are the power rails. Note: on many breadboards these rails are split in the middle. It's easy to miss, but if your rail is interrupted halfway and you only connect power to one half, you'll spend a long time looking for a fault that isn't in your circuit. Check this with a multimeter before you start.
For wire bridges and component connections, jumper wires male-female 150 mm from Multicomp Pro are a practical starting point — colour-coded and versatile.
What breadboards are good for
Through-hole component prototypes, microcontroller projects, sensor connections, filters, voltage dividers, simple amplifiers. Anything where you want to test and modify quickly. Also ideal for learning: you can see exactly how components are connected without everything disappearing onto a PCB.
What breadboards are not good for
High current. The contacts in a standard breadboard are rated for around 1 A per contact — and that's the theoretical maximum. In practice, contact resistance increases as contacts age or aren't kept clean. Don't use a breadboard for motor current, LED strips at full power, or mains-related circuits.
SMD components don't fit either — unless you put them on an adapter breakout board.
Signals and interference
The faster the signal, the more sensitive a breadboard is to interference. Long jumper wires act as antennas. Parasitic capacitance between adjacent rows can affect filters. With audio, RF or high PWM frequencies, a breadboard quickly becomes a source of baffling behaviour.
Keep wiring as short as possible. Connect the power rails neatly. Place decoupling capacitors close to ICs. That solves most issues.
From test to permanent
Does it work stably on the breadboard? Time for the next step: perfboard for a hand-soldered prototype, or a custom PCB when the project is finalised. A breadboard is a test platform, not a finished product — even if it's been sitting in a drawer for months and "always worked like that".