As the amount of light falling on the LDR changes so the resistance changes due to which we get variable voltage. The LDR and 10k resistor make a voltage divider circuit. The LDR “Light Dependent Resistor” is connected in series with a 10 kilo Ohm resistor. In the above circuit, the LM741 Operational Amplifier is used as the voltage comparator. If you study in detail about the amplifiers you will come to know that any Operational Amplifier can be used as the voltage comparator, but it is not necessary that any comparator can be used as the Operational Amplifier. LM741 Op Amp as the voltage comparator “complete designing explanation:Īs explained in very detail, LM741 is basically an Operational Amplifier but it can also be used as the Voltage comparator. LM741 Operational amplifier datasheet Specs Absolute Maximum Ratings LM741 Op amp IC Pinout / Pin configurationĪs you can see in the picture above, the LM741 IC has a total of 8 Pins which are clearly labeled. In this tutorial, I will explain in very detail how the LM741 Operational Amplifier can be used as the voltage comparator.
Lm741 operational amplifier Applications.Ĭomparator is the most important in circuits where two signals voltage to be compared.
LM741 Operational Amplifier, Description:.
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