Light control-- motion sensor, photosensor

Introduction Light sensitive sound module play audio file in SD card when sensor trigger by person pass by . Sound module , voice module,musical module , for advertisement . Features 1. DC 5V power 2.Light sensor tirgger, when the light level change (for example someone pass by before the sensor) , it will trigger and play thevoicein the SD card for one time 3. Easy to update the audio file in the SD card 4. Drive 0.5W speaker 5.Existing program play one file only , play one file and stop . we can modity the program and make it trigger different sound each time. Apllications Suitable for advertisement , banks , hospital , graden , etc