LDRs or Light Dependent Resistors are very useful especially in light/dark sensor circuits. Normally the resistance of an LDR is very high, sometimes as high as 1000 000 ohms, but when they are ...

Pro tip: The recommended wire gauge for a 15-amp light circuit is 14 AWG, but if you're branching off a circuit with 12-gauge wire, use 12 AWG wire instead. Turn off the power This is Rule Number ...

Simple Light Sensor Circuit Features High Dynamic Range. Dec. 13, 2009. ... The photocell’s dark current is about 2 nA and its maximum output is about 60 µA at saturation level.