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The circuit begins at the 9-volt battery.

Okay, so let’s recap datqsheet the circuit. Pin 3 is the Output Pin. It shorts this noise to ground and allows the pure DC signal into the regulator. In this article, we use a positive voltage regulator, which outputs 5V, the LM regulator.

MCCT Datasheet pdf – 3-Terminal 1A Positive Voltage Regulator – Fairchild Semiconductor

Sign up for Our Newsletter Name: Without ground, the circuit couldn’t be complete because the voltage wouldn’t have electric potential and the circuit wouldn’t have a return path. Now this DC voltage, clean and crisp, is ready to power whatever you want it to, in this case, the load is a resistor and 709ct LED. 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 daatasheet 5 volts, the output of the transformer datasheeet 10 volts is fed into the regulator input pin 1 so that the regulator can regulate it down to your wanted voltage 5 volts.


After it comes out of the regulator, the other capacitor, the 0. This capacitor is there again to filter out any noise or high-frequency ac signals that may be on the DC voltage line. Usually the only external components necessary are just capacitors, though heat sinks may also need to be added when heat dissipation is necessary. Keep in mind 77809ct the design of a voltage regulator depends on the voltage regulator being used and the intended use of a circuit.

If you don’t have all the parts, don’t feel bad. Therefore, it has a smoothing effect and even things out. A voltage regulator is a 3-terminal device.

CT Datasheet, PDF – Alldatasheet

In this article, we go over how to connect a voltage regulator to a circuit to get a specific DC output regulated voltage. 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.

That’s why it’s a good idea to get into hooking up a voltage regulator properly from the sart. This is the pin that gives out the regulated voltage, which, in this case, is 5 volts. Pin 1 is the Input Pin. Okay, now let’s build the circuit. We don’t want any ac noise ripple imposed on the DC line voltage. The Datasheet specifies which value of capacitors to use, so it’s a good idea to learn from the people who manufacturered the chip.


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 parallel to the ceramic capacitor. You can buy them at anytime and come back to this page and do the experiment anytime.

Depending on the voltage regulator in use, we can get a regulated positive or negative voltage, at whichever voltage we want. However, for experimental purposes and ease of getting parts, we will use a 9-volt battery as our input voltage.

How to Connect a Voltage Regulator in a Circuit

This capacitor is there to filter out any noise coming from the voltage source the battery. Datasheeet 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.

The output voltage of whatever voltage source you want to regulate down whether it’s a transformer, battery, etc. 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.

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. The second capacitor, the 0.