Description: This versatile 741 operational amplifier module can be used for making a dark detector using an LDR, a photo transistor and a photo diode. The amplifier has been configured in inverting mode. It compares the change in voltage at pin 2 with the reference voltage at pin 3 and gives output at pin 6 accordingly.
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REQUIRED COMPONENTS:
- Resistors: 10k (2), 15k (2), 100k (1).
- IC: 741
- Variable resistor(preset/potentiometer): 1M (1).
- LED (1).
- LDR (1) or Photodiode (1) or Phototransistor (1).
- LED: Any color
- Mini breadboard
- Battery: 6V- 9V
- Wires
Project on mini breadbaord:
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Schematic:
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