Eduqas GCSE Design and Technology · C600
Component 1
Revise: Electronic Systems, Inputs and OutputsA siren is appropriate when a loud security warning is needed, rather than a small project buzzer or timer bleep. Sounders have specified operating voltage and current requirements, such as 12 V and 100 mA, which the system must meet. A high-power siren usually needs a suitable transducer driver or relay arrangement rather than being connected directly to a sensing signal.