Potentiometers - Basic Introduction

This electronics video tutorial provides a basic introduction into potentiometers which are variable resistors. These devices have application in voltage divider circuits, volume control in speakers and brightness control for light bulbs and LED circuits.

What Is a Diode?

Full-Wave Bridge Rectifiers:

Voltage Multiplier Circuit:

Light Emitting Diodes:

Power Dissipation In LEDs & Diodes:

LED Resistor Value:

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LED Dimmer Circuit:

Thermistors - Temperature Sensors:

Zener Diodes:

Voltage Regulators - Zener Diodes:

Zener Diode Solar Cell:

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Power Zener Diodes - Voltage Regulation:

12V LED Battery Level Indicator:

Reverse Polarity Circuit Protection:

High Voltage Surge Protection Circuit:

AC DC Polarity Tester Circuit:

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DC to AC Reverse Polarity Circuit:

Varactor Diodes - Voltage Capacitors:

Final Exams and Video Playlists:

Full-Length Videos and Worksheets:
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[mikebaker]

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[markhosea]

Thanks! The drawing was very useful in helping me understand how the cylindrical potentiometer works

[lelenovo]

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[daruscole]

Also, does he go over the difference between these and the other one, the rheostat?

[successthruknowledge]

A very thorough explanation however the last example was difficult for me to visualize. I think that it would be nice if he created a real world physical example using the potentiometer in the same way as did a real world example with capacitors and diodes. Anyway great explanation.

[RosieDaCherrie]

Ooh, nice to know how the inner mechanisms of controllers work. Neat video!

[yuvaltal]

Multiplication of total resistance by the V in will give us the V out? Can you explain this further more please? Thank you!

[michaelspurlock]

Does a potentiometer only do series circuits or can you parallel circuits with them too?

[baerster]

I have a question about why a potentiometer used as a volume control needs to have three lugs. It seems that in an audio circuit, the first lug goes to the input signal, the middle lug (wiper) is the output (coming out from the pot) and the third lug goes to ground. I assume this means that the balance of the current (the current that does not go out the wiper) goes to ground, unless the wiper is all the way at the "max volume" end and in that case all current goes out the wiper. Is that correct? What would happen if there was no connection to ground, and the current could go only out the wiper but not down the rest of the track and out to ground?

[Anarchsis]

So which would I use to control the output from an air blower on a coffee roaster? Or temperature into the roast chamber? I’m a simple man please answer in simple terms. I think they’re both the voltage one, but I’m probably wrong.

[amirulasyraf]

What is the difference application between the two arrangement of the circuits? (one by using all 3 pins of the potentiometer and another only uses two pin). It seems to me that both have the same function of varying the resistance. Or is there any other thing I missed?

[s_imoke]

can you make a tutorial for audio distortion circuit ?

[.Abdulrahmannn]

If the circuit is connected from point A to C, I think the resistance should be the same no matter what you do to the nab. is that true?