# IC LM324

**LM324** is a 14pin IC consisting of four independent operational amplifiers (op-amps) compensated in a single package. Op-amps are high gain electronic voltage amplifier with differential input and, usually, a single-ended output. The output voltage is many times higher than the voltage difference between input terminals of an op-amp.

These op-amps are operated by a single power supply **LM324** and need for a dual supply is eliminated. They can be used as amplifiers, comparators, oscillators, rectifiers etc. The conventional op-amp applications can be more easily implemented with LM324.

Pin No | Function | Name |

1 | Output of 1 ^{st} comparator | Output 1 |

2 | Inverting input of 1 ^{st} comparator | Input 1- |

3 | Non-inverting input of 1 ^{st} comparator | Input 1+ |

4 | Supply voltage; 5V (up to 32V) | Vcc |

5 | Non-inverting input of 2 ^{nd} comparator | Input 2+ |

6 | Inverting input of 2 ^{nd} comparator | Input 2- |

7 | Output of 2 ^{nd} comparator | Output 2 |

8 | Output of 3 ^{rd} comparator | Output 3 |

9 | Inverting input of 3 ^{rd} comparator | Input 3- |

10 | Non-inverting input of 3 ^{rd} comparator | Input 3+ |

11 | Ground (0V) | Ground |

12 | Non-inverting input of 4 ^{th} comparator | Input 4+ |

13 | Inverting input of 4 ^{th} comparator | Input 4- |

14 | Output of 4 ^{th} comparator | Output 4 |

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