The diagram illustrates the operation and the structure of an LED flashlight.
Overall, a flashlight involves five main components which are batteries, slide switch, metal swich contacts and spring and flow of current.
The first layer of the flashlight is a plastic case covering all the components inside. There is a small light bulb placed on the top which emits light when the flashlight is triggered. On the left side of the flash is where the slide switch is installed next to the metal swich contact. When the flash turns on, the switch is pushed upward to connect to the circuit, thereby triggering the light. Meanwhile, the flash stops working when the switch is off, making the circuit broken and unable to deliver electricity. Inside the flash, there are two batteries which are also the main power source. A metal spring is placed on the bottom in order to let the current flow transmit the electricity.
