Definition
A temporary arrangement of electronic components used to test a circuit design before it is built in its final form. Components are connected on a board with reusable contact points, allowing the design to be modified and verified without soldering.
Plain English
A test setup where electronic parts are connected loosely on a board so the circuit can be tried out and changed before building the real thing.
Context Anchor
Seen in aircraft electrical, radio, and electronics maintenance discussions when a circuit or device is being developed, tested, or demonstrated.
Derivation
Originally, early radio experimenters built test circuits on actual wooden bread boards from the kitchen, mounting components with screws and wires. The name stuck even after purpose-built boards replaced the kitchen variety.
Why Pilots Care
A breadboard setup is for testing or development. It should not be confused with finished, approved aircraft equipment ready for normal flight use.
Intuition Check
Do not read this as a kitchen board. In this context, a breadboard is a temporary test setup for a circuit, not a finished aircraft part meant to fly as-is.
Example Sentence 1
The avionics technician built the new transponder circuit on a breadboard to verify it worked before installing the final unit.
Example Sentence 2
Using a breadboard allowed the team to quickly change resistor values while testing the audio amplifier circuit.