Door Auto censor door bell
AUTO DOOR CENSOR DOOR BELL USING PHOTO DIODE IR SENSOR Description- This is very use full technique for auto door bell censor using photo diode . in this project very cheap cost materials we will use. This is very use full bell because when on door any person wants to knock but you busy this time than normal door bell click in your mind some one has on gate. but using this auto sensor you will not getting any disturbance during present some one door only u can use only beep light that is indicate you some one on door, If any thief like to listen to your presence in your , for that he will take their ear near to door and he can listen you your present in your room and he will wait up to your sleeping.... but when you will use this sensor door bell than you definitely got intelligent trick. if in case any thief will come to near door and wants to touch any of lock of door , your auto door sensor bell inform you any one has present at your door. as you can get alert without informing