Smart Safety Helmet: Safe Way Is The Best Way

While people tend to follow the rule of wearing a helmet, it can still lead to various issues since there is no set parameter on how tight a helmet should be worn. Hence, these students have put a sensor with a switch that helps detect if the helmet is worn loosely. The smart helmet uses a normally open switch to enable the buzzer. When a momentary switch is not actuated, it's in a ?normal? state. Depending on how the button is constructed, its normal state can be either an open circuit or a short circuit. When a button is open until actuated, it's said to be a normally open switch.

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