conexión fuente dual

Summary

This video demonstrates the process of connecting and polarizing operational amplifiers in an analog electronics lab. The presenter explains the setup of a dual power supply providing both positive and negative voltage, which is crucial for op-amps. Detailed instructions are given on connecting the power sources, verifying voltages with a multimeter, and setting up the op-amp (e.g., a 741 model). The steps include wiring the positive and negative terminals, checking voltage levels, and confirming proper operation of the circuit. The tutorial also highlights how to ensure correct polarization of the op-amp for successful functionality.

Takeaways

• 😀 The demonstration takes place in an analog electronics laboratory, focusing on how to set up a dual power supply for operational amplifiers.
• 😀 Some operational amplifiers require dual power supplies, meaning they need both positive and negative voltages, referenced to ground.
• 😀 The power supply needs to deliver voltages such as +5V, -5V, +12V, or -12V, depending on the requirements of the specific circuit.
• 😀 It is essential to correctly connect the wires, ensuring the positive and negative connections match with the corresponding voltages.
• 😀 The demonstration involves two power supply sources, and their positive and negative outputs are connected in series to generate a common ground.
• 😀 The common ground can be established by connecting the positive terminal of one source to the negative terminal of the other, forming a dual supply.
• 😀 The voltages of both sources are checked using a multimeter to ensure the correct output of +12V and -12V.
• 😀 A method of configuring the power supplies is explained, where adjusting one source (master) automatically adjusts the second source (slave).
• 😀 The operational amplifier used in the demonstration is the LM741, a popular op-amp with eight terminals.
• 😀 Polarization of the op-amp is achieved by correctly connecting the positive voltage to terminal 7 and the negative voltage to terminal 4.
• 😀 Finally, the voltage at the op-amp's terminals is measured to ensure proper polarization, with +12V at terminal 7 and -12V at terminal 4, confirming the correct setup.

Q & A

What is the main focus of the demonstration in the script?

The demonstration focuses on how to connect an operational amplifier to a dual power supply for proper polarization, using both positive and negative voltages referenced to ground.

Why do operational amplifiers require a dual power supply?

Operational amplifiers often require a dual power supply because they need both positive and negative voltages to function correctly, with the ground acting as the reference point for the signals.

What voltages are typically used for the dual power supply in this demonstration?

The voltages used for the dual power supply in this demonstration are +12V and -12V, but they can vary, with common values being +5V, -5V, or +15V, -15V.

How are the power supplies connected in this demonstration?

In the demonstration, the positive terminal of one power supply is connected to the negative terminal of the other, creating a common ground or reference point. This setup provides the dual voltages required for the operational amplifier.

What is the function of the multimeter in this demonstration?

The multimeter is used to verify the voltages being supplied by the power sources, ensuring that the correct +12V and -12V are being provided for the operational amplifier.

How does the adjustment of the power supply perilla (dial) affect the voltage output?

When the perilla (dial) is adjusted, both power supplies move simultaneously, which allows for easier control and ensures that the voltages stay balanced as +12V and -12V. This simplifies the process of setting up the dual power supply.

What is the purpose of the 'common' or 'ground' terminal in this setup?

The 'common' or 'ground' terminal serves as the reference point for the voltage measurements and connections. It allows the operational amplifier to correctly process the input and output signals relative to the ground.

What are the key steps to polarizing the operational amplifier in the setup?

The key steps include connecting the positive voltage to pin 7 and the negative voltage to pin 4 of the operational amplifier, with the common terminal being used for reference. Afterward, the voltages are verified using a multimeter to ensure proper polarization.

What role do the pins 4 and 7 on the operational amplifier play?

Pin 4 is connected to the negative voltage (ground reference), and pin 7 is connected to the positive voltage. These connections are essential for proper polarization and operation of the amplifier.

What happens if the voltage measurements are incorrect during the polarization process?

If the voltage measurements are incorrect, it indicates that the operational amplifier is not properly polarized, which may lead to malfunctioning of the circuit. It's crucial to verify the voltages with a multimeter to ensure proper operation.