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To make a circuit device that can ensure that an accident and emergency bay is always lit.  

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To make a circuit device that can ensure that an accident and emergency bay is always lit. For this device that I am about to make I will need the following components: A power supply A light sensor An inverter A transducer driver A bulb This is what each of the components does 1. Power supply is the most important in this circuit because without the powered the circuit won't work. 2. Light sensor is the sensor that can detect light. 3. An inverter is the unit that does the opposite job of he whole circuit itself. For example if there is no one using the emergency room it will automatically send an electrical signal to switch of. But if someone enters the room it will also automatically switch on. 4. A transducer driver gives extra power so that the bulb can light very well. 5. Bulb works like so... an electrical current flows through the wire in the bulb so...

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