The picture illustrates the design of a light emitting diode flashlight and how it functions.
Overall, the flashlight consists of five key components, namely plastic case, slide switch, light bulb, metal spring and battery. Moreover, the flashlight relies on batteries and the movement of the switch to create light.
Looking at the picture in more detail, at the bottom of the light is a metal spring, whose top end is connected to the batteries while the top of batteries connect with the light bulb. Furthermore, all the inside parts of the device are covered by a plastic case for insulation. A slide switch is placed on the flashlight’s handle, and linked with the inside components through electrical circuit in order to control the light.
With regard to the operation of the device, when the switch of the flashlight is pushed into the on position, it connects the metal switch contacts together, so that the circuit is completed, which allows a flow of electricity powered by the batteries to the light bulb, turning the flashlight on. In contrast, the circuit is broken when the switch is moved to the off position, which leads the electricity line being separated. Consequently, the flashlight is turned off.