Does the A741 support 12V single supply operation?

You say that whether the A741 can work with a single 12V power supply depends on your specific circuit. If used as a proportional amplifier, the op amp is not suitable for working in a single power supply, because of the structure of its input stage and output stage, the input signal must be 1 ·2V higher than the ground potential when it is powered by a single power supply, that is, when the op amp works in a single power supply, it cannot amplify the AC signal without distortion. If you want to amplify the AC signal without distortion in the case of a single power supply, you must bias its inverting input at half of the power supply voltage, which is more troublesome for the circuit.

If the op amp is used in a voltage comparator, it can operate from a single 12V supply.

By the way, the A741 is a bipolar op amp produced by the American company Fairchild in the 70s of the last century, and now this op amp is arguably the worst performing op amp on the planet (the A709 and A722 produced by the company in the 60s are now long discontinued), and even African electronics enthusiasts are reluctant to use it. It is recommended that you use the commonly used single-supply low-power dual op amp LM358 instead of A741, which can work on a single power supply. It's not inferior to the A741 in every performance metric (there's also an A747 with two A741s in it).

It's not a question of whether the op amp can support a single power supply, but whether the performance of the op amp can meet your needs under the working conditions of a single power supply?

Under the condition of single power supply, the input voltage range and output voltage range of UA741 will be limited to the power supply voltage range: usually 2V less than the 7-pin voltage and 2V higher than the 4-pin voltage.

For example, if you use 0 12 V for power supply, then the input voltage must vary between 2 10 V and the output voltage must not exceed the 2 10 V range. can accept this condition, even if it is "support"; If you want 0V input, or if you want to output 0V (or even negative voltage), then you can't support it.

1. Make the voltage and current in the opposite direction. As shown in the figure below, the positive and negative poles of the DC 12V power supply are reversed, if your load is a device that requires -12V voltage, you only need to connect the ground terminal of the Xunbo load to the positive terminal of the above power supply, and the other end is connected to the negative level of the above power supply.

2. Connect two DC 12V batteries in series, and treat the two batteries as a whole power supply, connect the positive pole of battery 2 with the negative pole of battery 1, and if the negative pole of battery 2 is set to 0V to the ground, then the output voltage of this whole power supply is +24V. When the negative pole of battery 1 and the positive pole of battery 2 are set to 0V to the ground, then the whole power supply has two output voltages, the output of battery 1 is +12V, and the output of battery 2 is -12V.

Summary. You have been waiting for a long time The input is 220V, and the voltage of 12V is output after passing through the transformer, and 12V is output through the transformer. Basically, every electrical appliance contains a transformer or a related power supply, through which each unit of the circuit can get a suitable working voltage, so that the circuit can work normally.

You've been waiting for a long time The input is 220V, and the voltage of 12V is output after passing through the transformer, and 12V is output through the transformer. Basically, every kind of electrical repentance device contains a transformer or a related power supply, through which each unit of the circuit can get a suitable working voltage, so that the circuit can work normally. <>

What is the problem with the output or 220v.

Use the Suishi of Xunzhao multimeter to measure the impedance resistance value of the primary and secondary windings, the high resistance value is the primary 220 volt winding, and the low resistance value is the secondary winding 12V. However, it can also be visually inspected, if the primary and secondary stages are separated up and down, the winding with more windings is 220V winding, and if there are fewer winding coils, it is 12V winding.

I also used one to test the normal power supply on another machine, and the replacement machine was only connected to the power supply live wire, and the output became 220, which was confusing.

If the voltage is low, the transformer capacity is small and the load is too large; The second is that the power supply itself does not reach the nominal 220 volts; The solution is to add a few turns of coils; If the load of Youbi is DC, use the full-wave rectification god to increase the filter capacitor, and the rolling answer is really not good, and it can also be connected to double the pressure rectification.

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What does -12v mean on the power supply.

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Hello dear <>

This means that the multi-channel output is 12V. The multiple power supply channels are not completely independent, in the power supply ** they are all led by a 12V channel with high current power supply capacity, but each cable has its own overcurrent protection circuit. The current limit group is marked on the power supply** device, so that users can notice and avoid connecting too many high-current loads to one power supply group.

In the beginning, power supplies with a "+12V multi-power channel" function mostly implied that they could deliver more than 20A on the +12V power channel, and were seen as a characteristic of a good power supply.

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-12V on the power supply is minus 12V on the supply voltage.

It is the socket that supplies power to the graphics card, and plugs the PCIe 6pin or 8pin power supply cable into the power strip.

The 8-pin power cord generally appears in the form of 6+2 in the power supply, which has the advantage that it can be used for both 6-pin graphics cards and 8-pin high-end graphics cards.

It means that you need to find a 6-pin and an 8-pin power supply in the case power supply to connect to the graphics card to power the graphics card, and both must be connected, otherwise the graphics card will not be able to supply power. In addition, if there is no 6-pin or 8-pin power supply, as long as there are enough 4D interfaces, two 4D interfaces can be converted to a 6-pin or 8-pin interface through a 4D adapter cable.

The power supply on ten 12V is to tell you that this is a working power supply with a voltage of 12 volts and a positive pole!

Summary. Hello, output 12v and +12v are not universal. Although they have the same numerical value, they have different electrode polarities.

In a circuit, the positive and negative polarity of the voltage is important because they determine the direction of the current flow and how the circuit works. +12V means that the positive pole of the voltage is 12V, and the negative pole is 0V; 12V, on the other hand, does not have a clear positive or negative polarity. Confusing +12V and 12V may result in circuit failure or equipment damage.

In the design and use of the circuit, the positive and negative polarity of the voltage should be clearly marked and used in strict accordance with the requirements. <>

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Can <> output 12V and +12V be universal.

Hello, output 12v and +12v are not universal. Although they have the same numerical value, they have different electrode polarities. In a circuit, the positive and negative polarity of the voltage is important because they determine the direction of the current flow and how the circuit works.

+12V means that the positive pole of the voltage is 12V, and the negative pole is 0V; 12V, on the other hand, does not have a clear positive or negative polarity. Confusing +12V and 12V may result in circuit failure or equipment damage. In the circuit design and use or combing, the positive and negative polarity of the voltage should be clearly marked and used in strict accordance with the requirements.

Shirt Lu [fresh finger first flower] kiss, <>

Hello, output 12v and +12v are not universal. Although they have the same numerical value, they have different electrode polarities. In a circuit, the positive and negative polarity of the voltage is important because they determine the direction of the current flow and how the circuit works.

12V means that the positive pole of the voltage is 12V, and the negative pole is 0V; 12V, on the other hand, does not have a clear positive or negative polarity. Therefore, if +12V and 12V are used confusingly, it may cause circuit failure or equipment damage. In the design and use of the circuit, the positive and negative polarity of the voltage should be clearly marked and used in strict accordance with the requirements.

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