Light dependent resistor(LDR), also called as Cadmium Sulphide (CdS) cell or photoresistor is a resistor whose value depends upon the incident light intensity. In darkness, the resistance of LDR becomes high and in light, the resistance gets low. The resistance variation phenomenon of LDR has been taken as a base for making circuits of LDR Engineering.



My question is that can wee use anything instead of light dependent resistor (LDR) ??