摘要：Phone Auto Lighting is a circuit that functions in darkness, when the telephonerang a voice we will need time to locate the phone because of the circumstancessurrounding the dark. Lighting circuit is very simple automated telephone usingonly IC MMV (Mono stable multi vibrator), sensor, LDR, opt coupler, and arelay to interface to the lamp lighting. This circuit uses an external powersupply, but due to the relatively small power consumption so batteries can beused as a resource. This system will work when there's a ringing telephone andlamp lighting is inadequate. Lighting will light a few seconds and thenautomatically turns off. Delay lights time can be adjusted according to the needsof users. This system also features a button to force longer burning lamps afterso many seconds when the light is the first time since the telephone ran.
