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. 10) Power up and test the circuit using a 9V DC. 9) Connect the +ve pin of the battery with pin 8 of the ICs and -ve with pin 4 of the IC. 8) After that, solder the -ve terminal of the 5V buzzer with pin 4 of the IC and +ve with pin 7 of the IC.
Remove LDR and insert a photodiode, it works instantly. 7) Now connect a 470 Ohm resistor with the +ve pin of the LEDs and pin 1, 7, and 1 of the LM358 ICs. 8D Datasheet : DUAL OPERATIONAL AMPLIFIER, 4558D PDF Download Japan. When you block light falling on LDR, the LM358 switches on the LED. A circuit calls for lm358 low power dual operational amp, but I only have 4558. You can get more LM358 projects from the following links: You can try this project using 741 IC also. You just need to replace an LDR with phototransistor or photodiode, the circuit simply works. 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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