*Automatic Light Sensor* bana ke dikhaya ja raha hai.
- *0-1 sec:* Pehle ek *LED* aur ek *Photo Cell* (LDR / IR Receiver) dikhaya.
- *2-6 sec:* Dono ko ek *9V Battery (POWER PLUS)* par solder kiya:
- LED ki ek taang Battery ke *+ (plus)* par
- Photo Cell ki ek taang Battery ke *- (minus)* par
- Aur beech me dono ki doosri taango ko aapas me jor diya
- *7-8 sec:* Jab mobile ki torch / roshni Photo Cell par daalte hain to *LED jal uthti hai*.
Ye asal me ek *Dark / Light Detector Circuit* hai. Jab Photo Cell par roshni parti hai to wo current ko guzarne deta hai aur LED ON ho jati hai. Isi trick se raat ko khud jalne wali light banayi jati hai.
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