The battery-powered device detects movement in front of the window using radar technology and begins to flash visibly through ...

Abstract: Sensors are used in the dc metro system for monitoring. Still, there is a problem of high costs using cable and battery power supply, while achieving self-powered technology through ambient ...

Abstract: A particularly handy electronic circuit for an audio engineer found in every sound recording studio and can also improve the visual appearance of any audio device if added to the front panel ...