If you stop light falling on the light dependent resistor, then immediately the LM358 IC turns on the LED. In the following simple dark sensor circuit. The required components to build the following circuit is LDR, LM358 IC, 9V battery, resistors R1-330R, R2-1K, R3-10K, variable resistor VR1-10K, transistor Q1-C547. The dark sensor circuit using LDR and LM358 IC is shown below. But, you need to change a photo diode and the photo transistor in place of LDR. This dark sensor IC LM358 circuit is used to test a light dependent resistor, a photo diode and a photo transistor. The power supply voltage and differential i/p voltages are similarĪpplications of LM358 IC LM358 IC based Dark Sensor Circuit.

Common mode i/p voltage range comprises ground.

The supply current drain is very low, i.e., 500 μA.

Range of dual power supplies is from + or -1.5V to + or -16V.

Range of Single power supply is from 3V to 32V.

Range of wide power supplies includes single and dual power supplies.

It consists of two op-amps internally and frequency compensated for unity gain.

LM358 IC Pin Configuration Features of LM358 IC

Pin-1 and pin-8 are o/p of the comparator.

Lm358 pinout download