Potentiometer Help? Answered

I am building a speaker out of two halmark music cards and i wanted to use a potentiometer to control the volume so i wouldn't have to do it on my ipod. I have build one before but did not use a potentiometer so i dont know how to wire it in. Other than the speaker im working on now and the speaker that I built before I have never built anything that involves electronics. What I need help with is what potentiometer I should get and how i should wire it into my project. Mostly I need to know how to wire it but if you could tell me what kind to get that would be great. I search high and low for about and hour but I could not find anything. I have included a diagram of all of the other speaker wiring. If you notice any problems with that also please tell me because i am sort of a noob at this. (I got a soldering iron two days ago) Thanks for the help.

Asked by DBMods 7 years ago  |  last reply 7 years ago

Automatic Potentiometer

Hi!  i need and automatic potentiometer it has to works max 5v i thouhgt about that and i can make it manually but it's to big and to weird  i want to ask you a form to make  it whit electronic components or a component ho can makes it i want to make a motor acelerates and desacelerates whith a soft curve and if its posible put the time of the cycle (example 40 seconds acelerat.... and .. desaceler...."cycle" or similar) Thanks Sorry for my bad english! Thanks! 

Posted by labalavermella 7 years ago  |  last reply 7 years ago


Hello everyone!  I currently have a project in development which is lacking only one step. I am making a DIY Electric skateboard powered by a Arduino UNO board. I have some leds in the back working fine, the esc and motor work when I adjust the delay to 1300 miliseconds.. But my problem is to control the esc and motor via de potenciometer. Right now my potenciometer only reads me the values from 0-1023 but nothing happens. I have a map in my code but nothing is moving when using the potentiometer. Can someone help me out to make the potenciometer work? Here is the link to the instructables page where I have all the materials I used and also the code! https://www.instructables.com/id/DIY-ARDUINO-SKATEBOARD/ Thanks in advance!!

Posted by MauroGB 1 year ago  |  last reply 1 year ago

Potentiometer for 20v??

Hello! I am trying to build a bench power supply from a laptop power supply and i need a potentiometer capable to handle 0-20v. I have tried many times with different potentiometers but they all start smoking and later starts burning :( i don't know that much about elektroniks circuits so be gentle :) Please help me!

Posted by WaNa_Cookie 4 years ago  |  last reply 4 years ago

Potentiometer help

Hello,I'm new here and pretty new to home audio/electronics projects so please bear with me here.I created my first clock amp a while ago using a Minty Amp kit, an Ikea alarm clock and some other bits and bobs. Here are some images:frontbackgutsI failed to take progress pics so couldn't create an instructable for the project but I plan to do that with my next one (I've had a lot of interest with people actually asking to have them made to order - which Mr Minty Amps, Bob Hickman, assures me is cool). Anyway, so I've ordered the parts to make another clock amp but decided to get some extra bits from Maplin.co.uk this time. In teh first amp I used a 250k guitar potentiometer for the volume but it's not sensitive enough and really only has three settings (full, quiet and silent). So, this time I ordered this 1k pot from Maplin. When the pot arrived it has a 50mm shaft which is too long for my project. I assume I can just trim the shaft down so long as I'm careful since it's only plastic. Is that right?Also, because it's not a guitar pot, the shaft is smooth and so the standard control knobs I have will not fit it. Does anyone know of a (cheap) type of control knob that will fit such a pot? I really don't want to have to glue a knob on there.Thanks for your help.

Posted by clockamps 10 years ago  |  last reply 10 years ago

Potentiometer Specs?

Hey, I just found a pot from some old electronic, and unsoldered it. The only numbers it has on it is B50k. So I know it's a 50k pot, but what about the other stuff? How can I know the max voltage, how can I know the max amount of amps it can handle before sizzling? Thanks!

Asked by HavocRC 5 years ago  |  last reply 5 years ago

Vintage Potentiometer to digital Potentiometer problems

I have modify a vintage wooded radio into a digital amp with bluetooth. It work great, but since I wanted to have the outside look I had no choices but to hack the 20k potentiometer on the digital amp (lepi 30$) to use the original Potentiometer.. the vintage one. I'm looking to find a way I can fix this Potentiometer so it would reach the 20k. The Potentiometer on the Lepi circuit board is a b20k for sure, but I don't know about the vintage one, there no info written on it. it's 2 questions for one thing, fix this volume so it won't blowout the speakers.   1- how to fix this ? I believe a resistor should do the job, but 'how much resistance needed? 2- if this is a resistor, well how do I solder it ? (6 wires, which one?) Any help would be greatly appreciated!

Asked by sebdub 5 years ago  |  last reply 4 years ago

Hollow shafted potentiometer?

Hi everyone,  I have a project I'm working on which has two halves that are connected using a potentiometer as the axis, resulting in the two being able to twist, changing the resistance of the potentiometer.  The problem I have is that the battery is in one half and the circuit is in the other half.  I have to somehow get the power to the circuit, but still have the pieces still be able to rotate.  I can't have the wires just sticking out of the side because it has to twist, and that would look horrible.  My first thought was to drill a small hole through the shaft of the potentiometer, so that I could run the wires through that, but when I tried to do that, it turned out to be a lot harder than I expected and I now have a busted potentiometer.  I would really like to avoid slip rings of any kind, as they would be exposed to the elements.  Does anyone have any ideas, or any advice on how to drill a nice hole through a steel rod lengthwise?  Ideally I would drill the hole, but if that's too difficult, I'll try whatever. Thanks ~Dudes

Posted by dudes 2 years ago  |  last reply 2 years ago

LED's, Resistors, and Potentiometers

I"m having some trouble with my LED and pot. My LED is a white 2.1v / 30mA My power source is 2 AAA batteries in series at 3v my pot says 500K on the back and three leads labeled 1, 2, 3 When my pot is at the off position, my LED is lit up perfect. but when I slightly turn the dial my LED starts to burn out and turns bright orange, and if I turn the dial further (Or let it sit for a minute) my LED turns bright red. I know that's ruining the LED... But what I'm dying to figure out is how do I know what resistors I would need to use with the pot, What's the math?

Posted by surlistyc 8 years ago  |  last reply 7 years ago

Dimming Leds and Potentiometers

Looking for a formula; I have a 24v 1.7 amp power supply ( http://www.allelectronics.com/make-a-store/item/PS-2417/24VDC-1.7A-POWER-SUPPLY/1.html ) to light 2 - 24v led strips ( http://www.allelectronics.com/make-a-store/item/LBR-24/24-WHITE-LED-LIGHT-STRIP-24VDC/1.html ). I want to be able to dim the led's from full power to completely off, but don't know how to calculate what size of potentiometer would give me the right ratio for dimming. IE, I don't want the LEDs to be completely off when the pot is only halfway turned. The urls are links to the exact products I purchased. Also, the power supply seems kind of large, and I still have to enclose it, so if anybody knows of a better and cheap path to get 24v that involves a little less potential for death, I'm all ears. Thanks!

Posted by bctour7 9 years ago  |  last reply 9 years ago

digital potentiometer pid?

Hello, i have digital potintiometer u/d fgive you 100 step for 10k ohm so 10k for 100 step, i use it as outpu of pid control that read the distance and set point of required distance and make p and i and d equation based on differance and summation i want to use that pid to altitude contol of helicopter ,the resistor that i change as output is connected to throttle when i increase to max(5k) it stop and min 1k it go ?max speed so  this work   code arduino **/ #include #include SoftwareSerial mySerial(52, 9,true); // RX, TX int f=0; char *buffer; byte x; char array[27]; int counter=0; unsigned char r; int p=0; int last; int error=0; int wew; int required ; int kpipo; int n; DigiPot pot(22,3,24); void setup() {    Serial.begin(9600);   mySerial.begin(9600); } void reading(){   mySerial.println(1); while (mySerial.available()) {    x= mySerial.readBytes(buffer,1);    if(*buffer==0x52){    x= mySerial.readBytes(buffer,1);    array[0]=*buffer;    x= mySerial.readBytes(buffer,1);    array[1]=*buffer;    x= mySerial.readBytes(buffer,1);    array[2]=*buffer;    } } delayMicroseconds(220); } void loop() {     if (f==0){   delay(600);}   f=1; reading();   int Final_inch=(array[0]-48)*100 + (array[1]-48)*10 +(array[2]-48) ;   float Final_cm=Final_inch*2.54;     Serial.print(Final_inch);   Serial.println(" Inch ");   //Serial.print(Final_cm);   //Serial.println(" cm "); required =29; error = required - Final_inch; //Serial.print(error); //Integral = Integral + Error; // accumulate the error integral //} //else { // Integral=0; // zero it if out of bounds //} kpipo=1; p =  (error * kpipo); // calc proportional term // I = //Integral*kI; // integral term //int D = (Last-Actual)*.1; // derivative term wew = (error/2) ;// scale Drive to be in the range 0-99 Serial.print(wew);//(wew) if (abs(wew)>400){    wew=0;} if ( wew >99) {  wew=99; } if (wew <-99) {  wew=-99; } n=abs(wew); if (wew < 0){ // Check which direction to go.     pot.increase(n);     delay(500);   } else { // depending on the sign of Error     pot.decrease(n);     delay(500); } last = Final_inch; // save current value for next time }

Asked by britich 5 years ago  |  last reply 5 years ago

3 pin potentiometer

I want to know if there is such a thing as a plastic connector where you can “plug in” a 3 prong potentiometer without having to solder them to wire. I am connection a 3 wire connection from my mc-60 power control board to a 5k potentiometer. It would be nice if there was some type plastic(or other) connector that you could plug in the potentiometer without having to solder the wire to the prongs. Thanks zetuskid

Asked by zetuskid 9 months ago  |  last reply 9 months ago

How to replace a potentiometer?

There is a potentiometer on my $500+ vintage guitar pedal that i recently broke off. Any suggestions to glueing it or figuring out a way to put it back on? The knob is the only part that is off and i still have the knob.

Asked by octopuscabbage 9 years ago  |  last reply 9 years ago

4 Potentiometers with Arduino? Answered

Hey, I'm not understanding something here.  If I hook up a pot (left 9v, middle A0, right GND), I get a varying voltage into pin A0 on Arduino. Then Arduino converts this into whatever. Well when I hooked up 4 potentiometers parallel to the same battery, and had them on pins A0-A3, none of the pots worked. Whenever I turned one pot, it would change the value for all the others (i was using serial monitor). How do I correctly hook up four pots to Arduino?

Asked by HavocRC 5 years ago  |  last reply 5 years ago

RGB Potentiometer help!

Hey guys and girls, I've got a question! I've got 3 voltage regulators set up in parallel, wired to output 3.27V @ an amperage that I don't know (for some reason I can't get a reading on my e-meter) Anyway, The outputs from those 3 regulators are going to 3 pots, which in turn go to a set of 3 LEDs, 9 in total (3R 3G and 3B). My problem is that those pots have a max resistance of 2k ohms, and that the LEDs aren't shutting off when the resistance is maxed out. Can you guys find a way to make the LEDs shut off, yet still go on at full blast when the Pots are open? Thanks, -Josh

Posted by T3h_Muffinator 11 years ago  |  last reply 10 years ago

(SOLVED) Mounting Slide Potentiometers

I need help for a project I am soon to begin work on ('ible coming soon). It will involve several switches and potentiometers mounted on a piece of hardboard. The switches and rotary potentiometers I have all have washers (or whatever you call the hexagonal things with screw-like threads on the inside) to secure them in place. The slide potentiometers don't. My question is this: How would I mount the slide potentiometers? Thanks in advance, ~H4ZZ

Posted by __DELETED__ 8 years ago  |  last reply 8 years ago

arduino control of digital potentiometer

Is it possible to use my new Ardy board to control a 1-wire potentiometer that will, in turn, control the pwm output for a high-power LED?The POT is here. The lights are REBELS @ 700mA.THe POT will be run in "non-parasitic" layout.

Posted by Tweac-it 10 years ago  |  last reply 6 years ago

How to solder potentiometer to speaker? Answered

Hi,the speaker for my alarm system is too loud, so i soldered this adjustable resistor (that i plucked out from my headset) on to the speaker. but somehow, the adjustable resistor only works as a resistor, i cant use it to control the volume.how can i solder it so that it works ?and btw potentiometer = adjustable resistor ?thanks

Asked by fujiapple 9 years ago  |  last reply 9 years ago

best price for trimming potentiometer

Elecsound can offer almost full range of lead type cermet Trimmer Potentiometers 3296 9mm Square Multi-Turn Trimmer Potentiometers 3006 Rectangular Multi-Turn Trimmer Potentiometers 3266 6mm Square Multi-Turn Trimmer Potentiometers 3269 6mm Square Multi-Turn Trimmer Potentiometers 3323 6mm Square Single-Turn Trimmer Potentiometers 3362 6mm Square Single-Turn Trimmer Potentiometers 3386 9mm Square Single-Turn Trimmer Potentiometers 3329 Round Single-Turn Trimmer Potentiometers For above items,we can have the competive price in the market,and fast delivery,if you need any of them,pls contact with us freely by email.mollie@elecsound.cn

Posted by elecsound33 12 years ago

treadmill potentiometer how to choose?

Asked by masti 8 years ago  |  last reply 8 years ago

how to replace a potentiometer by a photocell ? ?

In the diagram, two pins of the pot are connected to resistors on each side and the third (variable) to the power source. That makes three connections and the photocell has only two!?

Asked by marcia09 9 years ago  |  last reply 9 years ago

Where can I find a digital potentiometer?

I need a digital potentiometer for an upcoming arduino project. does anyone know where I could salvage one?

Asked by bravoechonovember1 1 year ago  |  last reply 1 year ago

No, that doesnt look right... Potentiometer Expert Needed!

Hi All! My brother and I are building an e-bike and we THINK we know how to attach a throttle, but it might blow up the battery... if worse comes to worse then we have a toggle button we can install but it's not really ideal. I've attached a circuit diagram below of how everything goes together, but this is my thinking; With nobody touching the throttle, in my circuit, wont i have a current flowing from the battery anode via the potentiometer straight back into the battery cathode? This results in a huge waste of energy doesnt it? And the battery would drain even when the bike is stored in a hallway overnight.  So, does anybody know if this circuit will work? i need it to take energy from the battery ONLY when active.

Posted by Tsimbilakis 3 years ago  |  last reply 3 years ago

How to determine what size Audio Potentiometer is needed? Answered

Second attempt to get this question to publish.....sigh... In a small project with approximately (1/4 watt) .25 watt audio output into an 8 ohm speaker, what size Audio (I assume non-linear for audio) Potentiometer should I purchase? I tried a 10k but either I got a Linear (from what I've read) or 10k is too large. When adjusting to volume, I get nothing for most of the turn and then I get all of the volume. I can adjust to the volume I need, but it's very oversenitive. I would like it to gradually adjust the volume. Thanks

Asked by keydogstony 7 years ago  |  last reply 7 years ago

How to use a potentiometer with this treadmill motor and speed controller?

Hi everyone I found this forum after doing a lot of searching on controlling the speed on a treadmill motor without using the big bulky digital display unit that sits on top of the treadmill. I bought a really nice Nordic Track for 10 dollars on Craigslist and I thought I would be able to figure out how to do this but apparently I was wrong. I have seen a lot of material regarding the MC-60 speed controller unit but nothing about the speed controller that came on the treadmill that I bought which was the MC-2100 Rev B. I will attach a couple of pictures of the board and specifically the wires coming from the display unit that go into the board. I have a 5k pot but I really dont know what to do with it and I am afraid to just start experimenting because I dont want to burn up the motor or the board. I would be happy to post any other pictures or add any other information that might be of help if anyone asks for it. Of course I would like to turn this little project into a lathe if I can ever get everything sorted out. btw the motor is a 2.25 hp cont duty. If the potentiometer wont work, I would love to hear about other ideas to be able to control the speed using this board and motor. Thanks everyone

Posted by wilsocn 7 years ago

Potentiometer knob collet work??

I have a 6.35mm smooth shaft Potentiometer and looking for a knob to go onto it. I've seen the set/grub screw type, i get how they work but worried about slipping. Also seen the collet type but not to sure how they clench down on the shaft. The shaft isn't threaded, as just a groove running along the top of it. Would it work like a conventional collet from say a dremmel tool?   

Posted by JonathanM221 1 year ago  |  last reply 1 year ago

Would this LED idea work?

Hello, I was thinking about this concept all day today, in which two potentiometers could vary the voltages to 2 of the 3 legs on a biocolored LED, thus being able to produce many different colors. I figure that I could hook up 3 volts, then (in parallel) hook up the two potentiometers to two of the leeds off the LED, the third being the ground. I'm not exactly an electronics guru, (and I hope that I had my vocabulary right in my explanation), but would this work? Also, where can I get some bicolor LED and potentiometers with knobs?

Posted by Jackhole 10 years ago  |  last reply 10 years ago

Help on getting a softpot?

Can I get one on the original creator's site or do I have to order a $20 one from another site? Please help!

Asked by ikestarm17 9 years ago

Potentiometer to control DC motor speed

I have a 12 volt fan in my RV. It has a 1.6 amp DC motor. Would a 2 watt, 350 ohm potentiometer be suitable to use as a variable speed control? If not, what potentiometer would I need?

Asked by gaugeguy 4 years ago  |  last reply 7 months ago

how can i set speeds with a potentiometer? Answered

Hi there, Im busy building a metronome to fit a machine im altering, (the board was totally fried and rusted through)  which also has a 6volt motor that spins in the front. I managed to find a potentiometer to control the speed of the motor and the metronome, but need to have set speeds on both of them. Is there anything that i can adapt to the potentiometers like a ratchet type system ? something maybe similar to a rotary switch that u click up and down? Im pretty new to all this, any help would be greatly appreciated. MGF

Asked by MrGreenFingers 7 years ago  |  last reply 7 years ago

How can i get reading from a potentiometer on a computer?

A Potentiometer, like the one in the picture I want to be able to get the reading of that on the computer...like numbers from 0 to 255(or whatever) Maybe through the serial post,if there is an instructable for this show me if not then tell me how

Asked by ReCreate 9 years ago  |  last reply 9 years ago

Is there a proper way to mount a potentiometer to a perforated circuit board?

I would like to attach my potentiometer directly to my perforated PCB, and I was wondering if there is a correct way to do this. I was thinking it has something to do with the tabs.  I know I can just solder wires to it, and then solder those to the board, but I would rather not have it hanging loose. My pot looks exactly like this: http://angela.com/images/products/detail/370430015798.jpg

Asked by erikp 7 years ago  |  last reply 7 years ago

What type of potentiometer should I use to limit two .25W speakers?

I need to limit the volume of two .25W speakers with a small potentiometer.  The speakers will be played and powered by a standard MP3 player.  I need to know which type of potentiometer to use (power rating etc...) thanks! James

Asked by goldenmole 8 years ago  |  last reply 8 years ago

how to make digital potentiometer as mechanical potentiometor using arduino?

 connection between digital pot x9c103p  INC - Arduino pin * U/D - Arduino pin 3 * VH  - 5V *VSS - GND *  VW  - Output: 150 Ohm resistor -> LED -> GND *  VL  - GND *  CS  - Arduino pin 4 *  VCC - 5V and the code i used #include DigiPot pot(2,3,4); void setup() {   Serial.begin(115200); } void loop() {   Serial.println("Starting");    for (int i=0; i<100; i++) {     Serial.print("Increasing, i = ");     Serial.println(i, DEC);     pot.increase(1);     delay(200);   }   for (int i=0; i<100; i++) {     Serial.print("Decreasing, i = ");     Serial.println(i, DEC);     pot.decrease(1);     delay(200);   } } what is error in that and how can i make sthing varry between 1k to 4k if i have digital potentiometer 10k

Asked by britich 5 years ago  |  last reply 5 years ago

How does one choose the right 100k potentiometer?

I am building a pickup winder... a simple machine that winds hair-thin copper wire around magnetic poles.I need to build a 12V DC geared electric motor speed controller. I bought the following...12V DC 1000RPM geared electric motorLCD punch digital counter with a magnetic proximity switch12V Double-Pole Double-Throw (DPDT) ON/OFF/ON toggle switchDC12V 2A Power Supply Adapter: AC100-240V to DC12V I know that a DC motor controller can be purchased for around $5-10, but since I am brand n00b to electronics, I want to take the opportunity to learn as much as I can by building everything (or as much as makes sense) myself. I found this Instrucable on building a DC motor speed controller. It seems simple enough, however, when I go to the Digi-Key website and look for 100k Ohm pots... there are a lot to choose from. I do not care about form factor. I have no size restraints or aesthetics. I just need a knob... that I can turn... that will allow me to set it to zero, switch the machine on and have the motor not turn at all... then slowly begin to spin as I turn the knob up to 10, and it is spinning at its top speed (1,000 rpm). This is the motor, this is the power supply, this is the counter, and this is the switch that I bought for this project. According to the instructable referenced above, I need: an IRF3205 mosfet, a 100k ohm potentiometer, and a heatsink. I do not yet have the vocabulary to even properly Google "How to tell which 100k ohm potentiometer works with a 12V DC motor..." Can someone please point me in the right direction?

Posted by Dolmetscher007 4 months ago  |  last reply 4 months ago

Potentiometer and motor isn't working properly

Hello, I'm fairly new to electronics and i am currently working on project involving an adjustable motor. basically the circuit is just a nine volt battery going through a potentiometer and into a 6-9 volt motor. however the motor only spins when the potentiometer is turned to max. the potentiometer is a 10k.

Posted by kanp1 2 years ago  |  last reply 2 years ago

Bench power supply potentiometer for 20v?

Hello! I am trying to build a bench power supply from a laptop power supply and i need a potentiometer capable to handle 0-20v. I have tried many times with different potentiometers but they all start smoking and later starts burning :( i don't know that much about elektroniks circuits so be gentle :) Please help me!

Asked by WaNa_Cookie 4 years ago  |  last reply 4 years ago

How to read values on preset potentiometer? Answered

Recently my multimeter died in a coilgun experiment. now i need to make some 555 circuits out of scraps. when i need some preset pot. i don't know their values. for e.g a preset pot has a reading of 103 on it(not a capacitor). How can i know its reading. is there anything like capacitor readings in it. 

Asked by ARJOON 8 years ago  |  last reply 2 years ago

Looking for a specific button/potentiometer ... can you help please ?

Hi. I'm looking for a button/potentiometer ... best described as AIR CON control in car. Where the middle is a button (on/off) - not rotating and it's just the round edge that is turning/rotating. Preferably continuous rotation, so there isn't any min /max for the rotation. Please,  can you advice the proper "English" name for this part. Or a link to few examples ? THANK YOU in advance. Z

Asked by zholy 4 years ago  |  last reply 4 years ago

Help with dc motor and potentiometer! Thanks

OK so my dad has this old turntable and I got him some cool records for Christmas and I tested them out and it sounded good but now the motor isn't working, its kinda temperamental. I know the motor works because i tested it separately with a 9V, i guess the wiring is just kinda old and faulty. Any way my idea is to put the motor on its own independent circuit and adjust its speed with a potentiometer. Its one of those small DC motors 12V. I was thinking about hooking it up to a battery pack and a pot to adjust the rpm, I could mount the knob on the face of the player and adjust it until the music sounds just right. Then i could make a mark for 33 rpm and 45 rpm so he can change records with just a twist of the knob. Or slow them down and speed them up just for fun lol. How can I wire all this? I did some googling and tried with a couple pots and motors I've harvested over the years but all the pots seem to smoke and sizzle with only a 9V battery. Do I need a different pot? Please help! thanks  

Posted by sticitodaman 7 years ago  |  last reply 7 years ago

Potentiometer not working after connected to wires

Hi, I'm fairly new to electronics and I'm trying to learn it with my Arduino. Recently I have been working on a project that involves 4 potentiometer(pot). I'm using one 1k pot and 3 10k pot. The pot is used to send signals to the analog inputs of the arduino. To test the pots I used a simple serial.println program that sends the value of the pot from 0 - 1023. When I connect the pot through its 3 pins directly to the breadboard, all of them work perfectly fine and gives me a stable value as I turn the pot. However, when I soldered three wires to them each, 2 of them work and 2 of them didnt. The 1k and one of the 10k pot didnt work. When I connected it through its wires, the values it gave kept jumping even when I'm not turning the knob and sometimes it will just stay one value when I'm turning it or not. Why is this happening? Did I overheat the pot when soldering? I took some new pots and tested them again through the pins directly and it worked perfectly fine. But when I soldered the wires to it, this time the 10k worked fine and the 1k didnt work. It gave the same problem as the ones before. Please help me with this problem. I have attached the pictures of the pots that didn't work. Please help me check if my soldering is anything wrong. I have checked online couldn't fine anyone experiencing the same problem. TQ! 

Posted by KhayhenS 3 years ago  |  last reply 3 years ago

Can a 500Kohm 2W audio taper pot replace a 500Kohm 1W audio taper pot?

I'm sourcing parts for a Theremin (http://www.therealcharleshobbs.com/keppingertubetheremin/) and the parts list calls for a 500K Ohm 1Watt Audio taper potentiometer. I cant find one rated at 1Watt, but I can find one rated at 2 Watts. Will the 2 Watt option be an acceptable replacement?

Asked by smkoberg 8 years ago  |  last reply 8 years ago

Does anybody know where to get a 315 mm ( -10mm) displacement sensor in the UK? Answered

A friend of mine is looking for a 315 mm displacement sensor (potentiometric). I've tried google but I can only find results over several hundred euro... On ebay I can only find very short potentiometers or expensive laser based sensors. Anybody know any alternative suppliers?

Asked by FoolishSage 6 years ago  |  last reply 6 years ago

rgb led and 1 analog input? Answered

Im trying to make an rgb led light up in different colors to based on the analog input, for instance a "potentiometer" or equivelent like the lm324 controlling the input causes the input to go higher the red turns on then green and then blue progressively, i have some code worked up but am willing to work from scratch again, im working with the lm324 op-amp and an arduino w/328

Asked by redd.the.cat 6 years ago  |  last reply 6 years ago

Which poteniometer for 8 ohm speaker into TEAC AG-980 Amp?

Hi there, I have this 65W amp hooked up to two pairs of JBL Control Ones (8 Ohm) and one Fenword 8 Ohm Speaker. This uses A/B/C/D with the amp's multi zone function. The Fenford is in our bathroom area (it's a small gym) and I want to attentuate the volume just for this speaker. Any idea which potentiometer I can solder onto the cable to damp the volume?

Asked by bowlerboy1973 1 year ago  |  last reply 1 year ago

linear input to control a rotating servo? Answered

Im trying to build a circuit in which an input uses linear motion to control a rotating servo. the servo rotates clockwise/counterclockwise, and the input should have 3 inputs. turning the servo clockwise, turning the servo counterclockwise, and a neutral option so the servo doesn't have to always move; the neutral would be between the to rotation inputs. The closest form of an input I've found so far is a sliding potentiometer since it is controlled by linear motion. If there's a better input that can have those 3 inputs i'd love to know.

Asked by explosive_bagels 7 years ago  |  last reply 7 years ago

Shop made bench power supply.

Hello I have an atx dual sata 550 watt power supply... I have seen a bunch of instructables on here that allow just a few different voltage selections.. I have also seen a few with potentiometers to allow it to be more adjustable (dial up or down the voltage). That is what i want, i dont want to be limited to just three different options. S my question to you is, what type of potentiometer do i need to buy for this? And will a regular autostore purchased dashboard voltage meter window work? Also, what type of fuse/or breaker should i use?. Do i even need one? I also head i need some kind of "switch" for this as well. I found circut diagrams, i found list of items needed, but most of the instructables ihave found arent very specific on the specs of these extra items needed... Any help or direction would greatly help. Im going out to radio shack today and would love to grab the items needed to finish this priject. Thanks all...

Posted by SlickSqueegie 6 years ago  |  last reply 6 years ago

Can I add a pot?

Hi. I have a metal detector and it can be quite loud when it finds a target. Unfortunately, there is no volume adjustment on it. I don't have a lot of experience wiring pots into circuits so I wanted to ask before I try something and damage my detector: Can I wire a pot inline with the speaker? And if so, would I ground it to the negative side of the battery pack or would I ground it elsewhere? Thanks in advance!

Posted by fosgate3 1 year ago  |  last reply 1 year ago

how do you make a pressure sensor that the harder you press the faster a motor turns?

I am looking for some help with creating something that the harder you press on an object the faster a motor turns. i am very new to electric stuff but i am a mechanical engineer. my application is kinda like a pressure sensor basically im trying to design a device that the harder some one presses on the "pressure sensor" the faster an array of dc vibrators rotate. so its transfering pressure into vibrations by increasing energy to the motors. any ideas?

Asked by mwaits 5 years ago  |  last reply 5 years ago