Light Dark Detector Alarm by IC 555

Today we come to see the circuit detects the light by have a voice warn. When meet the light or be become dark depend on using S1 ( follow the circuit ). For this my circuit uses the integrated circuit IC 555 be pillar equipment again. You can choose can use many the number be LM555 or NE555 or use the number instead of eat the low beam be IC 7555 all right. For that circuit when S1 stay in a position . And there is the light shines at LDR (Photoresistor) a loudspeaker will utter. When S1 stay in a position and have no the light at LDR loudspeaker utter also. This easy good circuit friends may have fun IC 555 detector light this please sir.

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