Potentiometer pin diagram

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# Potentiometer pin diagram

Welcome, Guest. Please login or register. Did you miss your activation email? Home Help Login Register. Strategy Poster2 Posts: Total likes: 45 Strategy. I'm somewhat a n00b on building but not as much any more. Something I'm really frustrated by in both the stompbox and synth DIY project universe is that I can't identify the pot pin numbering convention used from project to project- if there is any. Probably there's an answer to this buried in FAQs or books somewhere, and I'm sure that the answer is more complicated or I'm asking the question the wrong way or something.

But: is there a convention and if a project is unclearly diagrammed how can I save myself the trouble? Resoldering my wiring, Strategy. Figure the output is the wiper is the middle lug for a volume control. You want it to connect to ground when it's all the way down, turn the pot CCW and see which pin connects to it, put that one to ground.

That leaves 1 pin left, since the ground, and output are taken, the last pin left is the input lug. For gain knob it migth be backwardskinda need to understand what makes gain rise, often it's a VR [adjustable Again, hook to the wiper, turn the pot which way you want max to be [in the case of ground connection being highest gain, it'd be the potlug which provides 0.

Electrical Engineering Stack Exchange is a question and answer site for electronics and electrical engineering professionals, students, and enthusiasts. It only takes a minute to sign up. I know how to connect potentiometer, but to be honest I don't know why. I would really like to understand what I'm doing.

From what I have read the input voltage and the ground should be connected extreme terminals and the output to the middle one. Now few questions: 1 What would happen if ground was switched with the output? Can't I just use two of them?

So basically potentiometer is something like this. Few thoughts about potentiometer: 1 The total resistance of R1 and R2 is constant but we can split it as we want. Edit Basically what I'm asking in question one and thought 3 is whether following circuit is correct if I want to measure voltage in analog input? In general nothing, a resistor has no polarity. However, it depends on how you intend to use it connecting only two or all three terminals to essentially have two dependent resistors.

The input signal would be connected to ground through the top resistor and the wiper, and no signal would get to the output. If you want the output signal voltage the voltage on the wiper to vary between the voltages on the other two terminals, you must use all three, but if all you want is a rheostatyou can use one terminal and the wiper. Sign up to join this community. The best answers are voted up and rise to the top.

Home Questions Tags Users Unanswered. Connecting a potentiometer Ask Question. Asked 5 years, 9 months ago. Active 5 years, 9 months ago. Viewed 39k times. Edit So basically potentiometer is something like this. Please correct me if I misunderstood the concept. Tomek Tarczynski. Tomek Tarczynski Tomek Tarczynski 1 1 gold badge 2 2 silver badges 6 6 bronze badges.

## Rotary Potentiometer

Author Topic: 6 pin potentiometer wiring? Read times. I got a 6 pin potentiometer out of a Logitech subwoofer. Is there a way to wire it up to LED? If there is, how? Your question is quite confusing.

You really need to post a nice clear photo of the pot. There are a lot of different types of LEDS,from the normal ones which we use for indicator lights on Electronic equipment,to the high power ones used for lighting. From your previous postings,I think you mean the latter types. In that case,I would say that the current handling ability of ordinary pots of this kind won't be enough.

I would strongly suggest Shane you start reading up on your theory. You obviously are passionate about electronics but you have been asking a lot of questions have don't have many details and seem more like whims than actual project ideas.

Start out with a specific project and work out how to achieve it, even if it's just making circuits using the diagrams in the datasheet for IC's. If you have an end aim it will be easier for you to ask questions and for others to answer them. What Simon said!

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Ditto, but How many good tutorials have you run into that cover pots like this? Now, then Quote from: nop on July 07,am. That link, like my last post, was more of an "overview", rather than a tutorial. It's like the Make series with Colin? He does a good job telling you what these components arebut very little on how they should be used.

I also found it surprising that an audio site explained the different tapering of pots, but failed to mention the "loudness tap", as I did. The reason, I feel, that EEVblog has rocketed up the charts is that Dave goes the extra mile - er, kilometer - to explain the why s of things. Why you should buy a good meter kabang! Why you shouldn't call Microchip engineers "dickheads". I also realized we didn't answer the main question of how to wire a pot to an LED.

PWM is the preferred method nowadays. I think most of this is beyond the scope of a mere tutorial, and requires some actual understanding of basic electronics. It's hard to explain what a pot does in an audio or LED circuit without knowing about voltage dividers, source impedance and opamps.

A general purpose electronics book aimed at beginners like Practical Electronics for Inventors would probably be the best place to start. Both require some understanding of electronics beyond 'paint by the numbers'.The humble potentiometer or pot, as it is more commonly known is a simple electro-mechanical transducer.

It converts rotary or linear motion from the operator into a change of resistance, and this change is or can be used to control anything from the volume of a hi-fi system to the direction of a huge container ship. The pot as we know it was originally known as a rheostat or reostat in some texts - essentially a variable wirewound resistor. The array of different types is now quite astonishing, and it can be very difficult for the beginner in particular to work out which type is suitable for a given task.

The fact that quite a few different pot types can all be used for the same task makes the job that much harder - freedom of choice is at best confusing when you don't know what the choices actually are, or why you should make them. This article is not about to cover every aspect of pots, but is an introduction to the subject.

For anyone wanting to know more, visit manufacturers' web sites, and have a look at the specifications and available types. The very first variable resistors were either a block of carbon or some other resistive material with a sliding contact, or a box full of carbon granules, with a threaded screw to compress the granules.

More compression leads to lower resistance, and vice versa. These are rare in modern equipment, so we shall limit ourselves to the more common types. In general, it probably happens because the author is unaware of how to embed the characters or doesn't know what character set they should be using.

For manufactured products, it's probably because the stamping press simply doesn't have the character available. So, you must always note the context when a symbol is used, as it can and does change depending on the subject matter.

It is worthwhile to have a look at a few of the common pot types that are available. Figure 1 shows an array of conventional pots - both PCB and panel mounting. Figure 1 - Some Examples of Pots. Note that these are not to scale, although the relative sizes are passably close. Apart from the different body shapes and sizes, there are also many 'standard' mounting hole and shaft sizes.

Probably the most common of all is the one in the centre of the picture. A panel mount, 25 millimetre 1" diameter pot. These pots have been with us - almost unchanged - for 50 years or more. The remainder show a few of the many variations available.

Metric pots are also available in 16mm round and 25mm round formats. Most rotary pots have degrees of rotation from one extreme to the other. There are some other rotary types with only degrees or so, and some specialty types may have less than that again. First, we need to continue with the examination of the basic types and you thought the above small sample was enough. Well, as they say Knobs Before we look at other pot types, a quick sample of knobs.

Yes, I know that everyone has seen knobs, but a dissertation on pots would be less than complete if I didn't include the 'user interface'. Figure 2 - Some Examples of Knobs. Of these, only one deserves special mention - the one on the left. This is a multi turn vernier readout analogue in this case for a standard pot. Typically used with precision wirewound or conductive plastic pots, these used to be common on equipment where very accurate and repeatable settings were required.

They are expensive, but in their day were almost indispensable.A potentiometer is a three- terminal resistor with a sliding or rotating contact that forms an adjustable voltage divider.

The measuring instrument called a potentiometer is essentially a voltage divider used for measuring electric potential voltage ; the component is an implementation of the same principle, hence its name.

Potentiometers are commonly used to control electrical devices such as volume controls on audio equipment. Potentiometers operated by a mechanism can be used as position transducersfor example, in a joystick. Potentiometers are rarely used to directly control significant power more than a wattsince the power dissipated in the potentiometer would be comparable to the power in the controlled load.

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There are a number of terms in the electronics industry used to describe certain types of potentiometers:. Potentiometers consist of a resistive elementa sliding contact wiper that moves along the element, making good electrical contact with one part of it, electrical terminals at each end of the element, a mechanism that moves the wiper from one end to the other, and a housing containing the element and wiper.

See drawing. Many inexpensive potentiometers are constructed with a resistive element B formed into an arc of a circle usually a little less than a full turn and a wiper C sliding on this element when rotated, making electrical contact. The resistive element can be flat or angled. Each end of the resistive element is connected to a terminal E, G on the case. The wiper is connected to a third terminal Fusually between the other two. On panel potentiometers, the wiper is usually the center terminal of three.

For single-turn potentiometers, this wiper typically travels just under one revolution around the contact. The only point of ingress for contamination is the narrow space between the shaft and the housing it rotates in. Another type is the linear slider potentiometer, which has a wiper which slides along a linear element instead of rotating.

Contamination can potentially enter anywhere along the slot the slider moves in, making effective sealing more difficult and compromising long-term reliability. An advantage of the slider potentiometer is that the slider position gives a visual indication of its setting. While the setting of a rotary potentiometer can be seen by the position of a marking on the knob, an array of sliders can give a visual impression of, for example, the effect of a multi-band equalizer hence the term "graphic equalizer".

The resistive element of inexpensive potentiometers is often made of graphite. Conductive track potentiometers use conductive polymer resistor pastes that contain hard-wearing resins and polymers, solvents, and lubricant, in addition to the carbon that provides the conductive properties.

Multiturn potentiometers are also operated by rotating a shaft, but by several turns rather than less than a full turn. Some multiturn potentiometers have a linear resistive element with a sliding contact moved by a lead screw; others have a helical resistive element and a wiper that turns through 10, 20, or more complete revolutions, moving along the helix as it rotates.

Multiturn potentiometers, both user-accessible and preset, allow finer adjustments; rotation through the same angle changes the setting by typically a tenth as much as for a simple rotary potentiometer. A string potentiometer is a multi-turn potentiometer operated by an attached reel of wire turning against a spring, enabling it to convert linear position to a variable resistance.

User-accessible rotary potentiometers can be fitted with a switch which operates usually at the anti-clockwise extreme of rotation.

### Potentiometer

Before digital electronics became the norm such a component was used to allow radio and television receivers and other equipment to be switched on at minimum volume with an audible click, then the volume increased, by turning a knob. Multiple resistance elements can be ganged together with their sliding contacts on the same shaft, for example, in stereo audio amplifiers for volume control.

In other applications, such as domestic light dimmersthe normal usage pattern is best satisfied if the potentiometer remains set at its current position, so the switch is operated by a push action, alternately on and off, by axial presses of the knob.

Others are enclosed within the equipment and are intended to be adjusted to calibrate equipment during manufacture or repair, and not otherwise touched. They are usually physically much smaller than user-accessible potentiometers, and may need to be operated by a screwdriver rather than having a knob.The potentiometer is a handy little component that you really should know how to use.

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Check out the wiring examples at the end to see it in action. It is like the resistor. Between the two side pins of the potentiometer there is a strip of resistive material. For example as carbon.

This material creates resistance. We call the middle pin the wiper. It is connected somewhere on the strip between the two ends.

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You can move the point where the wiper connects to the carbon strip by turning the shaft of the potentiometer. When you move the wiper to the left side, the resistance between the middle pin and the left pin decreases. And the resistance between the middle pin and the right pin increases. When you buy a potentiometer, you have to choose a value. For example k.

This value is the resistance between the two end pins. As explained above, the two pins on the side connect to the ends of a carbon strip. The middle one connects somewhere between the ends of this strip. Keep that in mind, and have a look at the following three examples on how to wire a potentiometer. If you need a simple resistor that you can change the resistance of, you only need two pins: the middle pin and one of the side pins. The above image shows a simple circuit to dim an LED.

Turn the shaft of the potentiometer one direction and the resistance increases. Turn it the other direction and the resistance decreases. This way of connecting is actually equal to connecting only two pins. Connecting the third pin to the middle pin does not affect the resistance at all.

Some people prefer it this way. This example uses all three pins of the potentiometer to create a simple way of adjusting the volume of an amplifier. The more you turn the shaft, the more you decrease the volume.

Go back to read about all the basic electronic components. Really interested in electronics and enjoy the mail you send me. Like to expand my knowledge as much as possible.

Look forward to the next mail. Thanks David. Thank u so much my dear mr.

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Nydal dahl for inspiring me as far as electronics is concerns and to be honest u are a blessing to the world from GOD.By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service. Electrical Engineering Stack Exchange is a question and answer site for electronics and electrical engineering professionals, students, and enthusiasts.

It only takes a minute to sign up. I am trying to repair a very expensive manlift joystick. I had great luck soldering in a new potentiometer on a different machine and getting it back to work, but this other machine has a potentiometer that I have not seen before.

It has 4 pins total, three like a normal rotary potentiometer and then a fourth across from the other three pins. Clarostat has been purchased by Honeywell, so I am having a hard time finding any catalogs or datasheets for this guy. Can anyone point me in the right direction or advise what the fourth pin may be for? Would replacing with a standard three pin pot be a possibility?

TT Electronics seems to sell a product similar to the part sported in your photo datasheet. There are two possibilities for the 4th connection. The first is that it is a center-tap on the element. This might allow them to control the output at the neutral position of the joystick better. The second and less likely one is that it's a ground connection.

A quick test with an ohmmeter should settle the matter. Here is a picture of a center-tapped 10K pot. It would measure 5K from either end of the element to the opposite center-tap pin. The wiper would short to the center tap when in the center of rotation. Four-terminal potentiometers were common at one stage on hi-fi volume controls to give automatic "loudness" control - see What's a potentiometer with four terminals in this schematic?

My guess is that it's a linear pot and that the centre-tap is used to provide a definite GND or reference to assist with a deadzone in the centre of the pot. This would be intended to prevent creep when the joystick is centred. I found a Clarostat brochure on Stephen Engineering and they seem to be handling the product now. They don't have any four terminal pots listed.

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Viewed 8k times. It has another number stamped "B " Clarostat has been purchased by Honeywell, so I am having a hard time finding any catalogs or datasheets for this guy. Trey D Trey D 33 1 1 silver badge 4 4 bronze badges. Linear-taper extended-life 10K pot with a center tap and whatever shaft and bushing length spec there is- I guess 6. All that stuff was customizable if you bought a reasonable quantity.