LM358N Dual Operational Amplifier, ± 1.5V to ± 16V, DIP, 8-pin

Description

Tutorial: How to Use the LM358N Operational Amplifier

The LM358N is a dual operational amplifier in DIP (Dual Inline Package) format used for various types of electronic applications, such as signal filtering, audio signal amplification, or use as a comparator. It is ideal for both beginners and experts.

What you need

• Arduino
• Breadboard
• Jumper wires
• Power supply

Steps

1. Install the LM358N component on the breadboard, ensuring that the pins are correctly aligned with the breadboard holes.
2. Connect the power supply to the Vcc and GND terminals of the LM358N. Check the datasheet for supported power supply range (from ± 1.5V to ± 16V).
3. Connect the input signal to the non-inverting (+) pin of the LM358N.
4. Connect the reference signal to the inverting (-) pin of the LM358N.
5. Connect the output of the operational amplifier to a digital thermometer or other devices for data reading.
6. If necessary, add bypass capacitors between Vcc and GND near the LM358N component to reduce interference.
7. Write the Arduino sketch to acquire signals from the LM358N and display them on the serial monitor or a display.
8. Test the circuit with various input levels to verify that the operational amplifier is functioning correctly.

Example code

/*Sketch Arduino per testare LM358N*/
void setup() {
  Serial.begin(9600);
}

void loop() {
  int val = analogRead(A0); // Leggi il segnale dall'LM358N collegato a A0
  Serial.println(val);
}

Mini project

Create a simple alarm system using the LM358N as a comparator to detect the presence of people or objects in the field of view of a sensor.

Common mistakes

• Incorrect power supply
• Input signal connected to the wrong pin
• Missing bypass capacitors

Recommended accessories

• Arduino Uno R3
• Large breadboard
• Colored jumper wires
• Variable power supply

Frequently asked questions

What is the minimum and maximum voltage for the LM358N?
Check the component datasheet.

How can I use the LM358N as a comparator?
Connect the input signals to the inverting (-) and non-inverting (+) pins, then connect the output to an LED or a relay.