Depending upon the light level of your room, you might have to adjust the variable resistor to adjust sensitivity of the circuit. Remove LDR and insert a phototransistor, it works instantly. Remove LDR and insert a photodiode, it works instantly. When you block light falling on LDR, the LM358 switches on the LED. You can get more LM358 projects from the following links: You can try this project using 741 IC also. They can be utilized in a wide range of circuits such as voltage comparators, active filters and voltage-controlled oscillators (VCOs). These Op-Amps are frequently used to buffer or amplify signals. You just need to replace an LDR with phototransistor or photodiode, the circuit simply works. The LM358 is a low-power dual Op-Amp with two independent high-gain and frequency compensated operational amplifiers. ![]() ![]() This module can also be used for testing an LDR, a phototransistor and a photodiode. LM358 consists of two independent, high-gain, frequency-compensated operational amplifiers designed to operate from a single supply over a wide range of voltages. Description: LM358 is also one of the types of operational amplifier. IC LM358 Pinout, Equivalent, Applications & Other Info LM358 Datasheet(PDF) & Specifications - TI - FindIC armed forces.
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