| Keyword | Definition |
|---|---|
| battery | a power source for an electrical circuit |
| breadboard | a component with a grid of holes which let you connect components together without needing to solder them |
| buzzer | an output device which makes a beeping noise when part of an electrical circuit |
| hardware | physical components like input sensors or output devices |
| moisture sensor | input device which uses the way water conducts electricity to measure how wet or dry soil is |
| motor | output device which can make something spin round and round |
| resistor | an electrical component which restricts the flow of electricity around a circuit |
| servo | output device which can spin round to point in any direction |
| speaker | an output device which can turn electronic signals into sounds, music or speech |
| transistor | an electronic component which can work as an amplifier or digital switch |
