Hook up voltage regulator

Hello! I'm working on making a battery solution for a device which doesn't support it by default. I'm replacing the original outlet+adapter.
Table of contents

Follow the regulator manual's mounting instructions for the proper positioning of the mount. Some recommend a vertical mount while others require horizontal positioning. Attach the regulator to the mount. Screw or bolt the four corners of the regulator to the mount. Typically, this requires four screws or bolts and four washers and nuts.

Alternator/Regulator troubleshooting

Do not over tighten the bolts or you will damage the regulator housing, particularly if the housing is plastic. Connect the positive battery cable wire -- usually red -- to the regulator. Connect the generator or alternator wire to the regulator. Connect the field wire -- field coil wire -- to the field terminal on the regulator.

An "F" or "FIE" indicates the field terminal. Polarize the generator or alternator through the regulator.

Touch one end of the jumper wire to the battery terminal on the regulator. In order for the regulator to output 5 volts, the voltage entering has to be at least 2 volts higher, so it has to be at least 7 volts. However, for experimental purposes and ease of getting parts, we will use a 9-volt battery as our input voltage. Pin 2 is Ground.

It hooks up to the ground in our circuit. 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.

Pin 3 is the Output Pin. This is the pin that gives out the regulated voltage, which, in this case, is 5 volts. 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. If you don't have all the parts, just follow along.

external voltage regulator?

You can buy them at anytime and come back to this page and do the experiment. Let's view the complete circuit now and explanations will ensue. The first capacitor, the 0. This capacitor is there to filter out any noise coming from the voltage source the battery.

The voltage regulator works best and will be most efficient when a clean DC signal is fed into it. We don't want any ac noise ripple imposed on the DC line voltage. The capacitor, in essence, acts as a bypass capacitor. 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. The second 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.

How to Connect an Adjustable Voltage Regulator

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 start. Okay, so let's recap on the circuit. The circuit begins at the 9-volt battery. This produces a voltage of 9 volts. The first capacitor, the ceramic 0.

It shorts this noise to ground and allows the pure DC signal into the regulator. The regulator regulates this voltage down to 5 volts.


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