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Usually the only external components necessary are just capacitors, though heat sinks may also need to be added when heat dissipation is necessary. This capacitor is there to filter out any noise coming from the voltage source the battery.

In this case, we are using a LM, which outputs 5 volts. Pin 1 is the Input Pin.

MIK CT (Микрон) – Стабилизатор положительного напряжения (5, 8, 12, 15 В) (корпус TO)

It shorts the AC signal of the voltage signal which is noise on the voltage signal to ground and only the DC portion of the signal goes into the regulator. This capacitor charges up with voltage when the circuit has excess spikes in current and discharges to supply voltage when the circuit is low on current.

This capacitor is there again to filter out any noise or high-frequency ac signals that may be datashest the DC voltage line. We don’t want any ac noise ripple imposed on the DC line voltage. Remember, the input voltage has to be larger than the voltage that the regulator regulates out. The voltage regulator works best and will be most efficient when a clean DC signal is fed into it.

How to Connect a Voltage Regulator in a Circuit

Keep in mind that the design of a voltage regulator depends on the voltage regulator being used and the intended use of a circuit. Okay, so let’s recap on the circuit.


It hooks up to the ground in our circuit. So for instance, if you have 10 volts coming from a transformer that you want regulated down to 5 volts, the output of the transformer the 10 volts is fed into the regulator input pin 1 so that the regulator can regulate it down to your wanted voltage 5 volts. If you don’t have all the parts, don’t ratasheet bad. A voltage regulator is a 3-terminal device.

Always consult the Manufacturer’s Datasheet for the voltage regulator in use for a circuit to see how to hook it up with the necessary required external components. The circuit begins at the 9-volt battery. The regulator regulates this voltage down to 5 volts. For now, you can just follow along.

This produces a voltage 7809cy 9 volts. Let’s view the complete circuit now and explanations will ensue. This electrolytic capacitor acts as a smoothing capacitor, when load resistance changes cause abrupt voltage spikes and drops, in a circuit. In this article, we use a positive voltage regulator, which outputs 5V, the LM regulator. At the end of this experiment, when our circuit is hooked up, we’re going to read out the voltage with a multimeter and it should give out close to 5 volts.

But if you’re going to have a varying load, a potentiometer, for instance, on the output, it is well advised to add an electrolytic capacitor in 7089ct to the ceramic capacitor. When the load of a circuit is stable and unchanging, as in the example above, it is usually not necessary to add a large electrolytic capacitor on the output to act as a smoothing capacitor.

Also, design changes when dealing with the intended use of the circuit. The LM78XX voltage regulators are a popular kind for regulating and outputting positive voltage, while the LM79XX are a popular series of regulators for negative voltage.


Pin 2 is Ground. However, for experimental purposes and ease of getting parts, we will use a 9-volt battery as our input voltage. You can buy them at anytime and come back to this page and do the experiment anytime. More dataaheet be on this for more advanced projects, but this page is a good start for those starting off in connecting voltage regulators for basic circuits. In this article, we go over how to connect a voltage regulator to a circuit to get a specific DC output regulated voltage.


The second capacitor, the 0.

The voltage regulator should always be fed as smooth of a DC signal as possible which gives the best regulated output so it can regulate it down to its specified voltage. It shorts this noise to ground and allows the datashest DC datashee into the regulator. The capacitor, in essence, acts as a bypass capacitor. The Datasheet specifies which value of capacitors to use, so it’s a good idea to learn from the people who manufacturered the chip.

The output voltage of whatever daatasheet source you want to regulate down whether it’s a transformer, battery, etc. Essentially, it acts as a load balancer.

Pin 3 is the Output Pin. Before we can hook up the circuit, let’s first go over the pinout diagram of the voltage regulator, which is vital for hooking up the circuit. That’s why it’s a good idea 7809ch get into hooking up a voltage regulator properly from the sart.

The first capacitor, the ceramic 0. Depending on the voltage regulator in use, we can get a regulated positive or negative voltage, at whichever voltage we 77809ct. For a circuit like this, where we’re lighting an LED, it isn’t exactly crucial to have a pure DC signal, but in other applications, such as when outputting voltage to power a logic chip, which needs a precise voltage fed into it in order to give the correct logic output, it is crucial.