A motion detector is an electrical device that utilizes a sensor to detect nearby motion. Such a device is often integrated as a component of a system that automatically performs a task or alerts a user of motion in an area. They form a vital component of security, automated lighting control, home control, energy efficiency, and other useful systems.
Laser DiODE& Chip
Driven by voltage, the doped p–n-transition allows for recombination of an electron with a hole. Due to the drop of the electron from a higher energy level to a lower one, radiation, in the form of an emitted photon is generated. This is spontaneous emission. Stimulated emission can be produced when the process is continued and further generates light with the same phase, coherence and wavelength.
MCU/ GPU/ NPU
A digital signal processor (DSP) is specialized for signal processing. Graphics processing units (GPUs) are processors designed primarily for realtime rendering of images. Other specialized units exist for video processing and machine vision. (See: Hardware acceleration.) Microcontrollers in embedded systems and peripheral devices. Systems on chip (SoCs) often integrate one or more microprocessor and microcontroller cores with other components such as radio modems, and are used in smartphones and tablet computers.